./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/hard-ll_unwindbound20.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 a3d3bea00f90884a75828a52041ade76894eb11b308d280406ab40770bedb299 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:09:33,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:09:33,206 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:09:33,209 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:09:33,209 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:09:33,221 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:09:33,221 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:09:33,221 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:09:33,222 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:09:33,222 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:09:33,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:09:33,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:09:33,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:09:33,222 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:09:33,222 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:09:33,222 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:09:33,222 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:09:33,222 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:09:33,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:09:33,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:09:33,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:09:33,222 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:09:33,223 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:09:33,223 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:09:33,223 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> a3d3bea00f90884a75828a52041ade76894eb11b308d280406ab40770bedb299 [2025-03-08 05:09:33,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:09:33,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:09:33,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:09:33,448 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:09:33,448 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:09:33,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c [2025-03-08 05:09:34,594 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd60f0a9e/1ec3ce2a62d74200abd5f48a0637d5f6/FLAG39412abfa [2025-03-08 05:09:34,783 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:09:34,783 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c [2025-03-08 05:09:34,808 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd60f0a9e/1ec3ce2a62d74200abd5f48a0637d5f6/FLAG39412abfa [2025-03-08 05:09:35,156 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd60f0a9e/1ec3ce2a62d74200abd5f48a0637d5f6 [2025-03-08 05:09:35,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:09:35,159 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:09:35,160 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:09:35,161 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:09:35,165 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:09:35,165 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,167 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47818d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35, skipping insertion in model container [2025-03-08 05:09:35,167 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,176 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:09:35,272 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/hard-ll_unwindbound20.c[538,551] [2025-03-08 05:09:35,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:09:35,294 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:09:35,303 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/hard-ll_unwindbound20.c[538,551] [2025-03-08 05:09:35,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:09:35,320 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:09:35,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35 WrapperNode [2025-03-08 05:09:35,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:09:35,322 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:09:35,322 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:09:35,322 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:09:35,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,330 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,345 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2025-03-08 05:09:35,346 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:09:35,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:09:35,347 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:09:35,347 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:09:35,352 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,353 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,367 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]. [2025-03-08 05:09:35,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,369 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,371 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,371 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,372 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,373 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:09:35,374 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:09:35,375 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:09:35,375 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:09:35,376 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (1/1) ... [2025-03-08 05:09:35,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:09:35,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:35,399 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) [2025-03-08 05:09:35,402 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 [2025-03-08 05:09:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:09:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:09:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:09:35,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:09:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-08 05:09:35,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-08 05:09:35,467 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:09:35,469 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:09:35,625 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-08 05:09:35,625 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:09:35,634 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:09:35,634 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:09:35,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:09:35 BoogieIcfgContainer [2025-03-08 05:09:35,634 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:09:35,636 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:09:35,636 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:09:35,640 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:09:35,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:09:35" (1/3) ... [2025-03-08 05:09:35,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42be691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:09:35, skipping insertion in model container [2025-03-08 05:09:35,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:09:35" (2/3) ... [2025-03-08 05:09:35,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42be691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:09:35, skipping insertion in model container [2025-03-08 05:09:35,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:09:35" (3/3) ... [2025-03-08 05:09:35,643 INFO L128 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound20.c [2025-03-08 05:09:35,656 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:09:35,659 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hard-ll_unwindbound20.c that has 2 procedures, 28 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 05:09:35,702 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:09:35,712 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;@6d13ff75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:09:35,712 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:09:35,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 05:09:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 05:09:35,722 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:35,722 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:35,723 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:35,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:35,728 INFO L85 PathProgramCache]: Analyzing trace with hash -841661746, now seen corresponding path program 1 times [2025-03-08 05:09:35,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:35,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499919941] [2025-03-08 05:09:35,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:35,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:35,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 05:09:35,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 05:09:35,798 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:35,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:09:35,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:35,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499919941] [2025-03-08 05:09:35,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499919941] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:09:35,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:09:35,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 05:09:35,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227306079] [2025-03-08 05:09:35,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:09:35,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 05:09:35,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:35,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 05:09:35,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:09:35,850 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 05:09:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:35,868 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2025-03-08 05:09:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 05:09:35,870 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-08 05:09:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:35,874 INFO L225 Difference]: With dead ends: 53 [2025-03-08 05:09:35,874 INFO L226 Difference]: Without dead ends: 24 [2025-03-08 05:09:35,877 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:09:35,880 INFO L435 NwaCegarLoop]: 38 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, 38 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 [2025-03-08 05:09:35,881 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:09:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-08 05:09:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-03-08 05:09:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 05:09:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2025-03-08 05:09:35,905 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2025-03-08 05:09:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:35,905 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2025-03-08 05:09:35,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 05:09:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2025-03-08 05:09:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 05:09:35,906 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:35,906 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:35,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:09:35,906 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:35,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash 901148589, now seen corresponding path program 1 times [2025-03-08 05:09:35,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:35,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708283202] [2025-03-08 05:09:35,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:35,912 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 05:09:35,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 05:09:35,922 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:35,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:09:36,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708283202] [2025-03-08 05:09:36,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708283202] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:09:36,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:09:36,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:09:36,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967200282] [2025-03-08 05:09:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:09:36,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:09:36,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:36,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:09:36,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:09:36,053 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 05:09:36,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:36,104 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2025-03-08 05:09:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:09:36,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-08 05:09:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:36,105 INFO L225 Difference]: With dead ends: 38 [2025-03-08 05:09:36,105 INFO L226 Difference]: Without dead ends: 36 [2025-03-08 05:09:36,106 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:09:36,106 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:36,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 104 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:09:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-08 05:09:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2025-03-08 05:09:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 05:09:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2025-03-08 05:09:36,113 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2025-03-08 05:09:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:36,113 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2025-03-08 05:09:36,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 05:09:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2025-03-08 05:09:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 05:09:36,115 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:36,115 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:36,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:09:36,116 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:36,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:36,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1774160750, now seen corresponding path program 1 times [2025-03-08 05:09:36,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:36,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928226217] [2025-03-08 05:09:36,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:36,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:36,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 05:09:36,129 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 05:09:36,129 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:36,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:09:36,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:36,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928226217] [2025-03-08 05:09:36,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928226217] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:09:36,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:09:36,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 05:09:36,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058435566] [2025-03-08 05:09:36,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:09:36,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 05:09:36,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:36,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 05:09:36,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 05:09:36,185 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 05:09:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:36,198 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2025-03-08 05:09:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 05:09:36,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-08 05:09:36,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:36,199 INFO L225 Difference]: With dead ends: 44 [2025-03-08 05:09:36,199 INFO L226 Difference]: Without dead ends: 30 [2025-03-08 05:09:36,199 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 05:09:36,199 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:36,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:09:36,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-08 05:09:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-08 05:09:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 05:09:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2025-03-08 05:09:36,204 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2025-03-08 05:09:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:36,204 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2025-03-08 05:09:36,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 05:09:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2025-03-08 05:09:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 05:09:36,205 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:36,205 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:36,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 05:09:36,205 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:36,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1142350440, now seen corresponding path program 1 times [2025-03-08 05:09:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:36,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924783944] [2025-03-08 05:09:36,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:36,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:36,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 05:09:36,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 05:09:36,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:36,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:09:36,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:36,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924783944] [2025-03-08 05:09:36,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924783944] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:09:36,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:09:36,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:09:36,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234632057] [2025-03-08 05:09:36,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:09:36,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:09:36,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:36,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:09:36,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:09:36,291 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:09:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:36,362 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2025-03-08 05:09:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:09:36,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-03-08 05:09:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:36,363 INFO L225 Difference]: With dead ends: 44 [2025-03-08 05:09:36,364 INFO L226 Difference]: Without dead ends: 42 [2025-03-08 05:09:36,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:09:36,365 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:36,367 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:09:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-08 05:09:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2025-03-08 05:09:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 05:09:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2025-03-08 05:09:36,376 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2025-03-08 05:09:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:36,376 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2025-03-08 05:09:36,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:09:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2025-03-08 05:09:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-08 05:09:36,377 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:36,377 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:36,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 05:09:36,377 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:36,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash 205542093, now seen corresponding path program 1 times [2025-03-08 05:09:36,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:36,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539255185] [2025-03-08 05:09:36,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:36,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:36,383 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 05:09:36,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 05:09:36,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:36,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:09:36,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990624900] [2025-03-08 05:09:36,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:36,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:36,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:36,401 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) [2025-03-08 05:09:36,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:09:36,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 05:09:36,447 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 05:09:36,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:36,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:36,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:09:36,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:09:36,536 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:09:36,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:36,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539255185] [2025-03-08 05:09:36,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:09:36,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990624900] [2025-03-08 05:09:36,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990624900] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:09:36,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:09:36,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:09:36,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939680959] [2025-03-08 05:09:36,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:09:36,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:09:36,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:36,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:09:36,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:09:36,539 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:09:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:36,594 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2025-03-08 05:09:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:09:36,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2025-03-08 05:09:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:36,595 INFO L225 Difference]: With dead ends: 63 [2025-03-08 05:09:36,595 INFO L226 Difference]: Without dead ends: 48 [2025-03-08 05:09:36,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:09:36,596 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:36,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 105 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:09:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-08 05:09:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-03-08 05:09:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-08 05:09:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2025-03-08 05:09:36,602 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 20 [2025-03-08 05:09:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:36,602 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2025-03-08 05:09:36,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:09:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2025-03-08 05:09:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 05:09:36,605 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:36,605 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:36,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:09:36,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:36,806 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:36,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:36,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1822786374, now seen corresponding path program 1 times [2025-03-08 05:09:36,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:36,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193169110] [2025-03-08 05:09:36,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:36,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:36,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 05:09:36,817 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 05:09:36,817 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:36,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:09:36,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273561749] [2025-03-08 05:09:36,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:36,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:36,820 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) [2025-03-08 05:09:36,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:09:36,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 05:09:36,857 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 05:09:36,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:36,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:36,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 05:09:36,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:09:36,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:09:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:09:37,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:37,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193169110] [2025-03-08 05:09:37,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:09:37,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273561749] [2025-03-08 05:09:37,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273561749] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:09:37,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:09:37,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2025-03-08 05:09:37,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449846860] [2025-03-08 05:09:37,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:09:37,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 05:09:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:37,119 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 05:09:37,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:09:37,121 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:09:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:37,218 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2025-03-08 05:09:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:09:37,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2025-03-08 05:09:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:37,220 INFO L225 Difference]: With dead ends: 66 [2025-03-08 05:09:37,220 INFO L226 Difference]: Without dead ends: 63 [2025-03-08 05:09:37,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:09:37,220 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:37,220 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 116 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:09:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-08 05:09:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2025-03-08 05:09:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 39 states have internal predecessors, (47), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-08 05:09:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2025-03-08 05:09:37,232 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 28 [2025-03-08 05:09:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:37,232 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2025-03-08 05:09:37,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:09:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2025-03-08 05:09:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 05:09:37,233 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:37,233 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:37,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 05:09:37,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-08 05:09:37,434 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:37,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash 182754622, now seen corresponding path program 1 times [2025-03-08 05:09:37,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:37,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598521245] [2025-03-08 05:09:37,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:37,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:37,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 05:09:37,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 05:09:37,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:37,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:09:37,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598521245] [2025-03-08 05:09:37,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598521245] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:09:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048671794] [2025-03-08 05:09:37,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:37,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:37,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:37,552 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) [2025-03-08 05:09:37,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:09:37,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 05:09:37,588 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 05:09:37,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:37,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:37,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 05:09:37,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-08 05:09:37,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:09:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:09:37,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048671794] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:09:37,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:09:37,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2025-03-08 05:09:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863193028] [2025-03-08 05:09:37,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:09:37,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 05:09:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:37,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 05:09:37,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:09:37,660 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-08 05:09:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:37,749 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2025-03-08 05:09:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:09:37,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 35 [2025-03-08 05:09:37,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:37,750 INFO L225 Difference]: With dead ends: 157 [2025-03-08 05:09:37,750 INFO L226 Difference]: Without dead ends: 132 [2025-03-08 05:09:37,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:09:37,751 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:37,751 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 119 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:09:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-03-08 05:09:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2025-03-08 05:09:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 85 states have internal predecessors, (97), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-08 05:09:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2025-03-08 05:09:37,773 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 35 [2025-03-08 05:09:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:37,773 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2025-03-08 05:09:37,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-08 05:09:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2025-03-08 05:09:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-08 05:09:37,774 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:37,774 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:37,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 05:09:37,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:37,974 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:37,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash 345705026, now seen corresponding path program 1 times [2025-03-08 05:09:37,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:37,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308798408] [2025-03-08 05:09:37,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:37,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:37,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 05:09:37,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 05:09:37,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:37,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:09:37,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972155052] [2025-03-08 05:09:37,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:37,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:37,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:37,994 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) [2025-03-08 05:09:37,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:09:38,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 05:09:38,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 05:09:38,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:38,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:38,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 05:09:38,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 05:09:38,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:09:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-08 05:09:38,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308798408] [2025-03-08 05:09:38,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:09:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972155052] [2025-03-08 05:09:38,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972155052] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 05:09:38,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:09:38,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-03-08 05:09:38,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963213331] [2025-03-08 05:09:38,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:09:38,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:09:38,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:38,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:09:38,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-08 05:09:38,191 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 05:09:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:38,264 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2025-03-08 05:09:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:09:38,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2025-03-08 05:09:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:38,267 INFO L225 Difference]: With dead ends: 148 [2025-03-08 05:09:38,268 INFO L226 Difference]: Without dead ends: 142 [2025-03-08 05:09:38,268 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:09:38,269 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:38,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:09:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-03-08 05:09:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2025-03-08 05:09:38,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 92 states have internal predecessors, (103), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2025-03-08 05:09:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 157 transitions. [2025-03-08 05:09:38,306 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 157 transitions. Word has length 38 [2025-03-08 05:09:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:38,307 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 157 transitions. [2025-03-08 05:09:38,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 05:09:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 157 transitions. [2025-03-08 05:09:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 05:09:38,307 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:38,307 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:38,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 05:09:38,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:38,509 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:38,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:38,509 INFO L85 PathProgramCache]: Analyzing trace with hash 62896557, now seen corresponding path program 1 times [2025-03-08 05:09:38,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:38,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634096323] [2025-03-08 05:09:38,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:38,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:38,513 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 05:09:38,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 05:09:38,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:38,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-08 05:09:38,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:38,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634096323] [2025-03-08 05:09:38,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634096323] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:09:38,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:09:38,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:09:38,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939550089] [2025-03-08 05:09:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:09:38,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:09:38,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:38,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:09:38,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:09:38,610 INFO L87 Difference]: Start difference. First operand 134 states and 157 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-08 05:09:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:38,653 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2025-03-08 05:09:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:09:38,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2025-03-08 05:09:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:38,654 INFO L225 Difference]: With dead ends: 139 [2025-03-08 05:09:38,655 INFO L226 Difference]: Without dead ends: 120 [2025-03-08 05:09:38,655 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:09:38,655 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 118 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 [2025-03-08 05:09:38,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 118 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:09:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-03-08 05:09:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2025-03-08 05:09:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 82 states have internal predecessors, (93), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2025-03-08 05:09:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2025-03-08 05:09:38,671 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 44 [2025-03-08 05:09:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:38,671 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2025-03-08 05:09:38,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-08 05:09:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2025-03-08 05:09:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 05:09:38,674 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:38,674 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:38,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 05:09:38,675 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:38,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:38,676 INFO L85 PathProgramCache]: Analyzing trace with hash 898461349, now seen corresponding path program 1 times [2025-03-08 05:09:38,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:38,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872027534] [2025-03-08 05:09:38,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:38,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:38,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 05:09:38,683 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 05:09:38,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:38,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 05:09:38,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:38,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872027534] [2025-03-08 05:09:38,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872027534] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:09:38,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391144629] [2025-03-08 05:09:38,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:38,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:38,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:38,749 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) [2025-03-08 05:09:38,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:09:38,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 05:09:38,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 05:09:38,785 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:38,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:38,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:09:38,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-08 05:09:38,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:09:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 05:09:38,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391144629] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:09:38,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:09:38,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-03-08 05:09:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000207192] [2025-03-08 05:09:38,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:09:38,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 05:09:38,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:38,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 05:09:38,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:09:38,913 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2025-03-08 05:09:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:39,059 INFO L93 Difference]: Finished difference Result 243 states and 296 transitions. [2025-03-08 05:09:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:09:39,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 51 [2025-03-08 05:09:39,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:39,061 INFO L225 Difference]: With dead ends: 243 [2025-03-08 05:09:39,061 INFO L226 Difference]: Without dead ends: 222 [2025-03-08 05:09:39,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:09:39,062 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 80 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:39,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 183 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:09:39,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2025-03-08 05:09:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2025-03-08 05:09:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 149 states have internal predecessors, (167), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2025-03-08 05:09:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 261 transitions. [2025-03-08 05:09:39,084 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 261 transitions. Word has length 51 [2025-03-08 05:09:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:39,085 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 261 transitions. [2025-03-08 05:09:39,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2025-03-08 05:09:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 261 transitions. [2025-03-08 05:09:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-08 05:09:39,086 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:39,086 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:39,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 05:09:39,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 05:09:39,286 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:39,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:39,287 INFO L85 PathProgramCache]: Analyzing trace with hash -387521360, now seen corresponding path program 1 times [2025-03-08 05:09:39,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:39,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490727482] [2025-03-08 05:09:39,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:39,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:39,292 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-08 05:09:39,311 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-08 05:09:39,311 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:39,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:09:39,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387850980] [2025-03-08 05:09:39,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:39,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:39,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:39,314 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) [2025-03-08 05:09:39,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:09:39,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-08 05:09:39,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-08 05:09:39,362 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:39,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:39,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 05:09:39,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-03-08 05:09:39,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:09:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-03-08 05:09:41,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:41,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490727482] [2025-03-08 05:09:41,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:09:41,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387850980] [2025-03-08 05:09:41,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387850980] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:09:41,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:09:41,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2025-03-08 05:09:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416051863] [2025-03-08 05:09:41,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:09:41,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:09:41,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:41,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:09:41,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:09:41,660 INFO L87 Difference]: Start difference. First operand 215 states and 261 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-08 05:09:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:42,483 INFO L93 Difference]: Finished difference Result 379 states and 486 transitions. [2025-03-08 05:09:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 05:09:42,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2025-03-08 05:09:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:42,486 INFO L225 Difference]: With dead ends: 379 [2025-03-08 05:09:42,487 INFO L226 Difference]: Without dead ends: 303 [2025-03-08 05:09:42,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:09:42,489 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 102 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:42,489 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 419 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 05:09:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2025-03-08 05:09:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 265. [2025-03-08 05:09:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 178 states have (on average 1.202247191011236) internal successors, (214), 187 states have internal predecessors, (214), 55 states have call successors, (55), 31 states have call predecessors, (55), 31 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2025-03-08 05:09:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 321 transitions. [2025-03-08 05:09:42,520 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 321 transitions. Word has length 60 [2025-03-08 05:09:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:42,520 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 321 transitions. [2025-03-08 05:09:42,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-08 05:09:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 321 transitions. [2025-03-08 05:09:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-08 05:09:42,522 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:42,522 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:42,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 05:09:42,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:42,727 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:42,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash -289430514, now seen corresponding path program 1 times [2025-03-08 05:09:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:42,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093995123] [2025-03-08 05:09:42,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:42,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:42,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-08 05:09:42,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-08 05:09:42,751 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:42,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:09:42,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319912510] [2025-03-08 05:09:42,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:42,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:42,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:42,755 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) [2025-03-08 05:09:42,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:09:42,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-08 05:09:42,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-08 05:09:42,795 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:42,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:42,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 05:09:42,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-08 05:09:43,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:09:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-08 05:09:43,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:43,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093995123] [2025-03-08 05:09:43,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:09:43,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319912510] [2025-03-08 05:09:43,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319912510] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:09:43,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:09:43,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2025-03-08 05:09:43,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247156230] [2025-03-08 05:09:43,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:09:43,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 05:09:43,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:43,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 05:09:43,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:09:43,624 INFO L87 Difference]: Start difference. First operand 265 states and 321 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2025-03-08 05:09:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:44,120 INFO L93 Difference]: Finished difference Result 389 states and 483 transitions. [2025-03-08 05:09:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:09:44,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 71 [2025-03-08 05:09:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:44,123 INFO L225 Difference]: With dead ends: 389 [2025-03-08 05:09:44,125 INFO L226 Difference]: Without dead ends: 320 [2025-03-08 05:09:44,126 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2025-03-08 05:09:44,126 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 71 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:44,126 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 389 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:09:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2025-03-08 05:09:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 271. [2025-03-08 05:09:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 183 states have (on average 1.2021857923497268) internal successors, (220), 188 states have internal predecessors, (220), 56 states have call successors, (56), 32 states have call predecessors, (56), 31 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2025-03-08 05:09:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 329 transitions. [2025-03-08 05:09:44,167 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 329 transitions. Word has length 71 [2025-03-08 05:09:44,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:44,167 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 329 transitions. [2025-03-08 05:09:44,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2025-03-08 05:09:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 329 transitions. [2025-03-08 05:09:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-08 05:09:44,168 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:44,168 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:44,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 05:09:44,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:44,368 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:44,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:44,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1903297253, now seen corresponding path program 2 times [2025-03-08 05:09:44,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:44,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332857584] [2025-03-08 05:09:44,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:09:44,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:44,374 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-03-08 05:09:44,381 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-03-08 05:09:44,382 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:09:44,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-08 05:09:44,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:44,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332857584] [2025-03-08 05:09:44,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332857584] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:09:44,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393319804] [2025-03-08 05:09:44,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:09:44,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:44,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:44,527 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) [2025-03-08 05:09:44,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:09:44,550 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-03-08 05:09:44,567 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-03-08 05:09:44,567 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:09:44,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:44,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:09:44,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-08 05:09:44,599 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:09:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-08 05:09:44,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393319804] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:09:44,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:09:44,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2025-03-08 05:09:44,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294625884] [2025-03-08 05:09:44,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:09:44,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:09:44,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:44,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:09:44,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:09:44,684 INFO L87 Difference]: Start difference. First operand 271 states and 329 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-08 05:09:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:44,740 INFO L93 Difference]: Finished difference Result 309 states and 376 transitions. [2025-03-08 05:09:44,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 05:09:44,741 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), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 74 [2025-03-08 05:09:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:44,742 INFO L225 Difference]: With dead ends: 309 [2025-03-08 05:09:44,742 INFO L226 Difference]: Without dead ends: 256 [2025-03-08 05:09:44,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:09:44,743 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:44,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:09:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2025-03-08 05:09:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 248. [2025-03-08 05:09:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 169 states have (on average 1.183431952662722) internal successors, (200), 172 states have internal predecessors, (200), 49 states have call successors, (49), 30 states have call predecessors, (49), 29 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2025-03-08 05:09:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 296 transitions. [2025-03-08 05:09:44,768 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 296 transitions. Word has length 74 [2025-03-08 05:09:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:44,768 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 296 transitions. [2025-03-08 05:09:44,768 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), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-08 05:09:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 296 transitions. [2025-03-08 05:09:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-08 05:09:44,769 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:44,769 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:44,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 05:09:44,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 05:09:44,973 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:44,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:44,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1586165993, now seen corresponding path program 1 times [2025-03-08 05:09:44,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:44,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73064787] [2025-03-08 05:09:44,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:44,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-03-08 05:09:44,982 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-03-08 05:09:44,982 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:44,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-08 05:09:45,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:45,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73064787] [2025-03-08 05:09:45,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73064787] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:09:45,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071892848] [2025-03-08 05:09:45,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:45,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:45,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:45,179 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) [2025-03-08 05:09:45,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:09:45,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-03-08 05:09:45,219 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-03-08 05:09:45,219 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:45,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:45,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 05:09:45,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-08 05:09:45,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:09:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-08 05:09:45,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071892848] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:09:45,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:09:45,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2025-03-08 05:09:45,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331901183] [2025-03-08 05:09:45,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:09:45,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:09:45,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:45,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:09:45,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:09:45,754 INFO L87 Difference]: Start difference. First operand 248 states and 296 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2025-03-08 05:09:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:45,973 INFO L93 Difference]: Finished difference Result 264 states and 319 transitions. [2025-03-08 05:09:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:09:45,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 76 [2025-03-08 05:09:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:45,975 INFO L225 Difference]: With dead ends: 264 [2025-03-08 05:09:45,975 INFO L226 Difference]: Without dead ends: 239 [2025-03-08 05:09:45,975 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:09:45,976 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:45,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 342 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:09:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2025-03-08 05:09:46,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 229. [2025-03-08 05:09:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 156 states have (on average 1.1923076923076923) internal successors, (186), 159 states have internal predecessors, (186), 45 states have call successors, (45), 28 states have call predecessors, (45), 27 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2025-03-08 05:09:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2025-03-08 05:09:46,018 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 76 [2025-03-08 05:09:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:46,018 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2025-03-08 05:09:46,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2025-03-08 05:09:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2025-03-08 05:09:46,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-03-08 05:09:46,019 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:46,019 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:46,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 05:09:46,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 05:09:46,219 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:46,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:46,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1809434793, now seen corresponding path program 1 times [2025-03-08 05:09:46,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:46,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821648833] [2025-03-08 05:09:46,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:46,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:46,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-03-08 05:09:46,227 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-03-08 05:09:46,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:46,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-03-08 05:09:46,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:09:46,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821648833] [2025-03-08 05:09:46,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821648833] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:09:46,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441935456] [2025-03-08 05:09:46,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:09:46,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:46,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:46,282 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) [2025-03-08 05:09:46,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:09:46,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-03-08 05:09:46,319 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-03-08 05:09:46,319 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:09:46,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:46,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 05:09:46,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-03-08 05:09:46,352 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:09:46,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441935456] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:09:46,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:09:46,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2025-03-08 05:09:46,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658584159] [2025-03-08 05:09:46,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:09:46,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:09:46,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:09:46,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:09:46,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:09:46,355 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-08 05:09:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:09:46,416 INFO L93 Difference]: Finished difference Result 250 states and 300 transitions. [2025-03-08 05:09:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:09:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 80 [2025-03-08 05:09:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:09:46,418 INFO L225 Difference]: With dead ends: 250 [2025-03-08 05:09:46,418 INFO L226 Difference]: Without dead ends: 230 [2025-03-08 05:09:46,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:09:46,418 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 12 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:09:46,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 131 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:09:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2025-03-08 05:09:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2025-03-08 05:09:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 152 states have (on average 1.1578947368421053) internal successors, (176), 154 states have internal predecessors, (176), 43 states have call successors, (43), 26 states have call predecessors, (43), 26 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2025-03-08 05:09:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2025-03-08 05:09:46,451 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 80 [2025-03-08 05:09:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:09:46,451 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2025-03-08 05:09:46,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-08 05:09:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2025-03-08 05:09:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-08 05:09:46,452 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:09:46,452 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:09:46,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 05:09:46,652 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,SelfDestructingSolverStorable14 [2025-03-08 05:09:46,652 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:09:46,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:09:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1631031142, now seen corresponding path program 3 times [2025-03-08 05:09:46,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:09:46,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777499349] [2025-03-08 05:09:46,653 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:09:46,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:09:46,658 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 8 equivalence classes. [2025-03-08 05:09:46,688 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 92 of 92 statements. [2025-03-08 05:09:46,689 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-08 05:09:46,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:09:46,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697642109] [2025-03-08 05:09:46,690 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:09:46,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:09:46,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:09:46,692 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) [2025-03-08 05:09:46,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:09:46,718 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 8 equivalence classes. [2025-03-08 05:09:46,737 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 64 of 92 statements. [2025-03-08 05:09:46,737 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:09:46,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:09:46,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-08 05:09:46,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:09:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2025-03-08 05:09:47,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:10:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2025-03-08 05:10:02,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:10:02,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777499349] [2025-03-08 05:10:02,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:10:02,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697642109] [2025-03-08 05:10:02,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697642109] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:10:02,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:10:02,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2025-03-08 05:10:02,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626068517] [2025-03-08 05:10:02,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:10:02,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:10:02,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:10:02,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:10:02,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:10:02,142 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2025-03-08 05:10:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:10:10,380 INFO L93 Difference]: Finished difference Result 296 states and 378 transitions. [2025-03-08 05:10:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 05:10:10,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 92 [2025-03-08 05:10:10,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:10:10,382 INFO L225 Difference]: With dead ends: 296 [2025-03-08 05:10:10,382 INFO L226 Difference]: Without dead ends: 272 [2025-03-08 05:10:10,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2025-03-08 05:10:10,382 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 89 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 128 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:10:10,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 487 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 456 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2025-03-08 05:10:10,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2025-03-08 05:10:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 250. [2025-03-08 05:10:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 168 states have (on average 1.1845238095238095) internal successors, (199), 175 states have internal predecessors, (199), 54 states have call successors, (54), 27 states have call predecessors, (54), 27 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2025-03-08 05:10:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 306 transitions. [2025-03-08 05:10:10,418 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 306 transitions. Word has length 92 [2025-03-08 05:10:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:10:10,419 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 306 transitions. [2025-03-08 05:10:10,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2025-03-08 05:10:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 306 transitions. [2025-03-08 05:10:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-08 05:10:10,419 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:10:10,419 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:10:10,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 05:10:10,624 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,SelfDestructingSolverStorable15 [2025-03-08 05:10:10,624 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:10:10,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:10:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash 617808032, now seen corresponding path program 1 times [2025-03-08 05:10:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:10:10,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943625680] [2025-03-08 05:10:10,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:10:10,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:10:10,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-08 05:10:10,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-08 05:10:10,635 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:10:10,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2025-03-08 05:10:10,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:10:10,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943625680] [2025-03-08 05:10:10,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943625680] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:10:10,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055259319] [2025-03-08 05:10:10,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:10:10,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:10,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:10:10,739 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) [2025-03-08 05:10:10,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:10:10,768 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-08 05:10:10,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-08 05:10:10,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:10:10,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:10,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 05:10:10,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:10:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-08 05:10:10,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:10:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2025-03-08 05:10:10,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055259319] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:10:10,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:10:10,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2025-03-08 05:10:10,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156848148] [2025-03-08 05:10:10,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:10:10,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 05:10:10,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:10:10,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 05:10:10,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:10:10,955 INFO L87 Difference]: Start difference. First operand 250 states and 306 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2025-03-08 05:10:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:10:11,251 INFO L93 Difference]: Finished difference Result 632 states and 806 transitions. [2025-03-08 05:10:11,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 05:10:11,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 98 [2025-03-08 05:10:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:10:11,254 INFO L225 Difference]: With dead ends: 632 [2025-03-08 05:10:11,254 INFO L226 Difference]: Without dead ends: 537 [2025-03-08 05:10:11,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:10:11,255 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 150 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:10:11,255 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 241 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:10:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2025-03-08 05:10:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 516. [2025-03-08 05:10:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 337 states have (on average 1.2166172106824926) internal successors, (410), 361 states have internal predecessors, (410), 120 states have call successors, (120), 58 states have call predecessors, (120), 58 states have return successors, (115), 96 states have call predecessors, (115), 115 states have call successors, (115) [2025-03-08 05:10:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 645 transitions. [2025-03-08 05:10:11,349 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 645 transitions. Word has length 98 [2025-03-08 05:10:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:10:11,349 INFO L471 AbstractCegarLoop]: Abstraction has 516 states and 645 transitions. [2025-03-08 05:10:11,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2025-03-08 05:10:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 645 transitions. [2025-03-08 05:10:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-03-08 05:10:11,351 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:10:11,351 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:10:11,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 05:10:11,551 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,SelfDestructingSolverStorable16 [2025-03-08 05:10:11,552 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:10:11,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:10:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash -278240796, now seen corresponding path program 2 times [2025-03-08 05:10:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:10:11,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270289497] [2025-03-08 05:10:11,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:10:11,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:10:11,558 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 103 statements into 2 equivalence classes. [2025-03-08 05:10:11,589 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 103 of 103 statements. [2025-03-08 05:10:11,591 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:10:11,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:10:11,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586430102] [2025-03-08 05:10:11,592 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:10:11,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:11,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:10:11,594 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) [2025-03-08 05:10:11,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:10:11,625 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 103 statements into 2 equivalence classes. [2025-03-08 05:10:11,657 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 103 of 103 statements. [2025-03-08 05:10:11,657 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:10:11,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:11,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-08 05:10:11,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:10:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 67 proven. 75 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2025-03-08 05:10:12,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:10:12,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:10:12,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270289497] [2025-03-08 05:10:12,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:10:12,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586430102] [2025-03-08 05:10:12,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586430102] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:10:12,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:10:12,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-08 05:10:12,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623015516] [2025-03-08 05:10:12,778 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:10:12,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 05:10:12,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:10:12,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 05:10:12,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:10:12,779 INFO L87 Difference]: Start difference. First operand 516 states and 645 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2025-03-08 05:10:13,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:10:13,232 INFO L93 Difference]: Finished difference Result 604 states and 752 transitions. [2025-03-08 05:10:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:10:13,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2025-03-08 05:10:13,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:10:13,235 INFO L225 Difference]: With dead ends: 604 [2025-03-08 05:10:13,235 INFO L226 Difference]: Without dead ends: 526 [2025-03-08 05:10:13,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:10:13,236 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:10:13,236 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 528 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:10:13,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2025-03-08 05:10:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 514. [2025-03-08 05:10:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 338 states have (on average 1.2011834319526626) internal successors, (406), 359 states have internal predecessors, (406), 115 states have call successors, (115), 60 states have call predecessors, (115), 60 states have return successors, (111), 94 states have call predecessors, (111), 111 states have call successors, (111) [2025-03-08 05:10:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 632 transitions. [2025-03-08 05:10:13,326 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 632 transitions. Word has length 103 [2025-03-08 05:10:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:10:13,326 INFO L471 AbstractCegarLoop]: Abstraction has 514 states and 632 transitions. [2025-03-08 05:10:13,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2025-03-08 05:10:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 632 transitions. [2025-03-08 05:10:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-03-08 05:10:13,327 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:10:13,327 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:10:13,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 05:10:13,532 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,SelfDestructingSolverStorable17 [2025-03-08 05:10:13,532 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:10:13,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:10:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1275313149, now seen corresponding path program 1 times [2025-03-08 05:10:13,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:10:13,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882540542] [2025-03-08 05:10:13,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:10:13,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:10:13,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 103 statements into 1 equivalence classes. [2025-03-08 05:10:13,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 103 of 103 statements. [2025-03-08 05:10:13,554 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:10:13,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:10:13,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009933551] [2025-03-08 05:10:13,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:10:13,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:13,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:10:13,559 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) [2025-03-08 05:10:13,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:10:13,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 103 statements into 1 equivalence classes. [2025-03-08 05:10:13,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 103 of 103 statements. [2025-03-08 05:10:13,607 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:10:13,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:13,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-08 05:10:13,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:10:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 58 proven. 84 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2025-03-08 05:10:14,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:10:15,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:10:15,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882540542] [2025-03-08 05:10:15,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:10:15,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009933551] [2025-03-08 05:10:15,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009933551] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:10:15,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:10:15,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-08 05:10:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855126624] [2025-03-08 05:10:15,695 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:10:15,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 05:10:15,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:10:15,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 05:10:15,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:10:15,696 INFO L87 Difference]: Start difference. First operand 514 states and 632 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2025-03-08 05:10:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:10:16,098 INFO L93 Difference]: Finished difference Result 522 states and 640 transitions. [2025-03-08 05:10:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:10:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2025-03-08 05:10:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:10:16,101 INFO L225 Difference]: With dead ends: 522 [2025-03-08 05:10:16,101 INFO L226 Difference]: Without dead ends: 520 [2025-03-08 05:10:16,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:10:16,102 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:10:16,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 433 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:10:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2025-03-08 05:10:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 512. [2025-03-08 05:10:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 337 states have (on average 1.2017804154302671) internal successors, (405), 359 states have internal predecessors, (405), 114 states have call successors, (114), 60 states have call predecessors, (114), 60 states have return successors, (110), 92 states have call predecessors, (110), 110 states have call successors, (110) [2025-03-08 05:10:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 629 transitions. [2025-03-08 05:10:16,172 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 629 transitions. Word has length 103 [2025-03-08 05:10:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:10:16,172 INFO L471 AbstractCegarLoop]: Abstraction has 512 states and 629 transitions. [2025-03-08 05:10:16,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2025-03-08 05:10:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 629 transitions. [2025-03-08 05:10:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2025-03-08 05:10:16,173 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:10:16,173 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:10:16,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 05:10:16,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:16,373 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:10:16,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:10:16,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1814396673, now seen corresponding path program 2 times [2025-03-08 05:10:16,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:10:16,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502740808] [2025-03-08 05:10:16,374 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:10:16,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:10:16,377 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-08 05:10:16,384 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-08 05:10:16,385 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:10:16,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-03-08 05:10:16,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:10:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502740808] [2025-03-08 05:10:16,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502740808] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:10:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349348443] [2025-03-08 05:10:16,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:10:16,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:16,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:10:16,674 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) [2025-03-08 05:10:16,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:10:16,699 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-08 05:10:16,721 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-08 05:10:16,721 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:10:16,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:16,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 05:10:16,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:10:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2025-03-08 05:10:17,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:10:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2025-03-08 05:10:17,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349348443] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:10:17,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:10:17,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 26 [2025-03-08 05:10:17,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605952715] [2025-03-08 05:10:17,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:10:17,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 05:10:17,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:10:17,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 05:10:17,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:10:17,714 INFO L87 Difference]: Start difference. First operand 512 states and 629 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2025-03-08 05:10:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:10:18,120 INFO L93 Difference]: Finished difference Result 539 states and 669 transitions. [2025-03-08 05:10:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:10:18,120 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) Word has length 108 [2025-03-08 05:10:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:10:18,122 INFO L225 Difference]: With dead ends: 539 [2025-03-08 05:10:18,122 INFO L226 Difference]: Without dead ends: 483 [2025-03-08 05:10:18,123 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:10:18,123 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 34 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:10:18,123 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 337 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:10:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2025-03-08 05:10:18,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 468. [2025-03-08 05:10:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 306 states have (on average 1.2156862745098038) internal successors, (372), 327 states have internal predecessors, (372), 107 states have call successors, (107), 54 states have call predecessors, (107), 54 states have return successors, (103), 86 states have call predecessors, (103), 103 states have call successors, (103) [2025-03-08 05:10:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 582 transitions. [2025-03-08 05:10:18,206 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 582 transitions. Word has length 108 [2025-03-08 05:10:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:10:18,208 INFO L471 AbstractCegarLoop]: Abstraction has 468 states and 582 transitions. [2025-03-08 05:10:18,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2025-03-08 05:10:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 582 transitions. [2025-03-08 05:10:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-03-08 05:10:18,210 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:10:18,211 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:10:18,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 05:10:18,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:18,413 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:10:18,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:10:18,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1472266516, now seen corresponding path program 1 times [2025-03-08 05:10:18,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:10:18,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257714154] [2025-03-08 05:10:18,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:10:18,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:10:18,417 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-03-08 05:10:18,423 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-03-08 05:10:18,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:10:18,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-03-08 05:10:18,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:10:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257714154] [2025-03-08 05:10:18,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257714154] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:10:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858507983] [2025-03-08 05:10:18,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:10:18,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:18,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:10:18,542 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) [2025-03-08 05:10:18,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:10:18,566 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-03-08 05:10:18,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-03-08 05:10:18,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:10:18,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:18,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 05:10:18,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:10:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-03-08 05:10:18,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:10:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-03-08 05:10:18,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858507983] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:10:18,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:10:18,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2025-03-08 05:10:18,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246444415] [2025-03-08 05:10:18,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:10:18,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:10:18,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:10:18,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:10:18,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:10:18,814 INFO L87 Difference]: Start difference. First operand 468 states and 582 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2025-03-08 05:10:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:10:19,212 INFO L93 Difference]: Finished difference Result 842 states and 1077 transitions. [2025-03-08 05:10:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 05:10:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) Word has length 110 [2025-03-08 05:10:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:10:19,217 INFO L225 Difference]: With dead ends: 842 [2025-03-08 05:10:19,217 INFO L226 Difference]: Without dead ends: 796 [2025-03-08 05:10:19,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:10:19,218 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 216 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:10:19,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 222 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:10:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2025-03-08 05:10:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 781. [2025-03-08 05:10:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 519 states have (on average 1.163776493256262) internal successors, (604), 551 states have internal predecessors, (604), 182 states have call successors, (182), 79 states have call predecessors, (182), 79 states have return successors, (174), 150 states have call predecessors, (174), 174 states have call successors, (174) [2025-03-08 05:10:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 960 transitions. [2025-03-08 05:10:19,349 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 960 transitions. Word has length 110 [2025-03-08 05:10:19,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:10:19,350 INFO L471 AbstractCegarLoop]: Abstraction has 781 states and 960 transitions. [2025-03-08 05:10:19,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2025-03-08 05:10:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 960 transitions. [2025-03-08 05:10:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-03-08 05:10:19,352 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:10:19,352 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:10:19,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 05:10:19,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:19,553 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:10:19,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:10:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1996723121, now seen corresponding path program 3 times [2025-03-08 05:10:19,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:10:19,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629289451] [2025-03-08 05:10:19,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:10:19,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:10:19,558 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 121 statements into 10 equivalence classes. [2025-03-08 05:10:19,574 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 103 of 121 statements. [2025-03-08 05:10:19,574 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 05:10:19,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 54 proven. 34 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2025-03-08 05:10:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:10:19,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629289451] [2025-03-08 05:10:19,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629289451] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:10:19,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370063717] [2025-03-08 05:10:19,674 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:10:19,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:19,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:10:19,676 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) [2025-03-08 05:10:19,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 05:10:19,703 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 121 statements into 10 equivalence classes. [2025-03-08 05:10:19,718 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 69 of 121 statements. [2025-03-08 05:10:19,718 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:10:19,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:19,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 05:10:19,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:10:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 148 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2025-03-08 05:10:19,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:10:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2025-03-08 05:10:19,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370063717] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:10:19,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:10:19,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 20 [2025-03-08 05:10:19,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606079992] [2025-03-08 05:10:19,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:10:19,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 05:10:19,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:10:19,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 05:10:19,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:10:19,971 INFO L87 Difference]: Start difference. First operand 781 states and 960 transitions. Second operand has 20 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 12 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-08 05:10:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:10:20,828 INFO L93 Difference]: Finished difference Result 955 states and 1152 transitions. [2025-03-08 05:10:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 05:10:20,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 12 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) Word has length 121 [2025-03-08 05:10:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:10:20,831 INFO L225 Difference]: With dead ends: 955 [2025-03-08 05:10:20,831 INFO L226 Difference]: Without dead ends: 900 [2025-03-08 05:10:20,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2025-03-08 05:10:20,833 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 95 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:10:20,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 428 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:10:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2025-03-08 05:10:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 863. [2025-03-08 05:10:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 587 states have (on average 1.1345826235093697) internal successors, (666), 602 states have internal predecessors, (666), 176 states have call successors, (176), 99 states have call predecessors, (176), 99 states have return successors, (169), 161 states have call predecessors, (169), 169 states have call successors, (169) [2025-03-08 05:10:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1011 transitions. [2025-03-08 05:10:20,971 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1011 transitions. Word has length 121 [2025-03-08 05:10:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:10:20,971 INFO L471 AbstractCegarLoop]: Abstraction has 863 states and 1011 transitions. [2025-03-08 05:10:20,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 12 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-08 05:10:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1011 transitions. [2025-03-08 05:10:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-03-08 05:10:20,972 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:10:20,972 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:10:20,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 05:10:21,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:21,172 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:10:21,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:10:21,173 INFO L85 PathProgramCache]: Analyzing trace with hash 951961348, now seen corresponding path program 4 times [2025-03-08 05:10:21,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:10:21,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438878372] [2025-03-08 05:10:21,173 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:10:21,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:10:21,179 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 124 statements into 2 equivalence classes. [2025-03-08 05:10:21,200 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-08 05:10:21,200 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:10:21,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:10:21,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961633316] [2025-03-08 05:10:21,202 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:10:21,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:10:21,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:10:21,205 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) [2025-03-08 05:10:21,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 05:10:21,233 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 124 statements into 2 equivalence classes. [2025-03-08 05:10:21,266 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-08 05:10:21,266 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:10:21,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:10:21,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-03-08 05:10:21,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:10:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 62 proven. 88 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2025-03-08 05:10:21,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:10:51,051 WARN L286 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 392 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)