./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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/hard2_valuebound2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:21:13,366 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:21:13,419 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:21:13,426 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:21:13,426 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:21:13,447 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:21:13,447 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:21:13,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:21:13,447 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:21:13,448 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:21:13,449 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:21:13,449 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:21:13,449 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:21:13,449 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:21:13,449 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:21:13,449 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:21:13,449 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:21:13,449 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:21:13,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:21:13,449 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:21:13,450 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:21:13,450 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:21:13,450 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:21:13,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:21:13,451 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:21:13,451 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:21:13,451 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:21:13,451 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:21:13,451 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 -> 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 [2025-03-16 18:21:13,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:21:13,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:21:13,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:21:13,646 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:21:13,647 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:21:13,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2025-03-16 18:21:14,738 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1970beb/39b0470440b9437e8cf53b0e49f50f72/FLAGe40126d72 [2025-03-16 18:21:14,969 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:21:14,970 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2025-03-16 18:21:14,976 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1970beb/39b0470440b9437e8cf53b0e49f50f72/FLAGe40126d72 [2025-03-16 18:21:15,305 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1970beb/39b0470440b9437e8cf53b0e49f50f72 [2025-03-16 18:21:15,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:21:15,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:21:15,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:21:15,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:21:15,311 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:21:15,312 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,312 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46904ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15, skipping insertion in model container [2025-03-16 18:21:15,312 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,321 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:21:15,397 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/hard2_valuebound2.c[526,539] [2025-03-16 18:21:15,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:21:15,410 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:21:15,418 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/hard2_valuebound2.c[526,539] [2025-03-16 18:21:15,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:21:15,430 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:21:15,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15 WrapperNode [2025-03-16 18:21:15,431 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:21:15,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:21:15,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:21:15,432 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:21:15,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,438 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,447 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2025-03-16 18:21:15,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:21:15,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:21:15,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:21:15,448 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:21:15,452 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,453 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,460 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2025-03-16 18:21:15,460 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,460 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,461 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,462 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,462 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,462 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,463 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:21:15,464 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:21:15,464 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:21:15,464 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:21:15,464 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (1/1) ... [2025-03-16 18:21:15,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:21:15,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:15,484 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) [2025-03-16 18:21:15,486 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 [2025-03-16 18:21:15,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:21:15,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:21:15,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 18:21:15,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:21:15,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:21:15,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 18:21:15,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 18:21:15,542 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:21:15,543 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:21:15,658 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-16 18:21:15,658 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:21:15,664 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:21:15,665 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:21:15,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:21:15 BoogieIcfgContainer [2025-03-16 18:21:15,666 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:21:15,668 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:21:15,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:21:15,671 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:21:15,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:21:15" (1/3) ... [2025-03-16 18:21:15,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b869c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:21:15, skipping insertion in model container [2025-03-16 18:21:15,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:21:15" (2/3) ... [2025-03-16 18:21:15,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b869c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:21:15, skipping insertion in model container [2025-03-16 18:21:15,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:21:15" (3/3) ... [2025-03-16 18:21:15,674 INFO L128 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2025-03-16 18:21:15,685 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:21:15,686 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hard2_valuebound2.c that has 2 procedures, 22 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 18:21:15,718 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:21:15,725 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;@2b1fe928, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:21:15,725 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:21:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 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) [2025-03-16 18:21:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 18:21:15,730 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:15,731 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:15,731 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:15,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1301550854, now seen corresponding path program 1 times [2025-03-16 18:21:15,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:15,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894878157] [2025-03-16 18:21:15,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:15,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 18:21:15,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 18:21:15,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:15,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:21:15,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:15,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894878157] [2025-03-16 18:21:15,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894878157] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:15,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:15,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 18:21:15,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543110589] [2025-03-16 18:21:15,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:15,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 18:21:15,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:15,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 18:21:15,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:21:15,837 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2025-03-16 18:21:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:15,847 INFO L93 Difference]: Finished difference Result 42 states and 72 transitions. [2025-03-16 18:21:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 18:21:15,848 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2025-03-16 18:21:15,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:15,851 INFO L225 Difference]: With dead ends: 42 [2025-03-16 18:21:15,851 INFO L226 Difference]: Without dead ends: 19 [2025-03-16 18:21:15,853 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 [2025-03-16 18:21:15,854 INFO L435 NwaCegarLoop]: 30 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, 30 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 [2025-03-16 18:21:15,855 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-16 18:21:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-16 18:21:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2025-03-16 18:21:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2025-03-16 18:21:15,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 7 [2025-03-16 18:21:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:15,874 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2025-03-16 18:21:15,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2025-03-16 18:21:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2025-03-16 18:21:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 18:21:15,874 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:15,874 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:15,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 18:21:15,875 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:15,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:15,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1330180005, now seen corresponding path program 1 times [2025-03-16 18:21:15,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:15,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077571981] [2025-03-16 18:21:15,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:15,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:15,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 18:21:15,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 18:21:15,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:15,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:21:16,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:16,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077571981] [2025-03-16 18:21:16,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077571981] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:16,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:16,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:21:16,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433092] [2025-03-16 18:21:16,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:16,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:16,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:16,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:16,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:21:16,003 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2025-03-16 18:21:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:16,053 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2025-03-16 18:21:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2025-03-16 18:21:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:16,055 INFO L225 Difference]: With dead ends: 31 [2025-03-16 18:21:16,055 INFO L226 Difference]: Without dead ends: 29 [2025-03-16 18:21:16,055 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 [2025-03-16 18:21:16,057 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 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 [2025-03-16 18:21:16,057 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-16 18:21:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2025-03-16 18:21:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2025-03-16 18:21:16,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2025-03-16 18:21:16,064 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 7 [2025-03-16 18:21:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:16,064 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2025-03-16 18:21:16,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2025-03-16 18:21:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2025-03-16 18:21:16,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 18:21:16,064 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:16,064 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:16,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 18:21:16,065 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:16,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:16,065 INFO L85 PathProgramCache]: Analyzing trace with hash 733792983, now seen corresponding path program 1 times [2025-03-16 18:21:16,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:16,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818704033] [2025-03-16 18:21:16,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:16,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:16,071 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 18:21:16,078 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 18:21:16,078 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:16,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:21:16,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:16,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818704033] [2025-03-16 18:21:16,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818704033] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:16,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:16,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:21:16,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146084860] [2025-03-16 18:21:16,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:16,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:16,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:16,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:16,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:21:16,153 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-03-16 18:21:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:16,204 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-03-16 18:21:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:16,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2025-03-16 18:21:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:16,205 INFO L225 Difference]: With dead ends: 35 [2025-03-16 18:21:16,205 INFO L226 Difference]: Without dead ends: 33 [2025-03-16 18:21:16,206 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 [2025-03-16 18:21:16,206 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 76 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 [2025-03-16 18:21:16,206 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 76 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-16 18:21:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2025-03-16 18:21:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2025-03-16 18:21:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2025-03-16 18:21:16,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 12 [2025-03-16 18:21:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:16,211 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2025-03-16 18:21:16,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-03-16 18:21:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2025-03-16 18:21:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 18:21:16,211 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:16,211 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:16,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 18:21:16,211 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:16,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash 699336485, now seen corresponding path program 1 times [2025-03-16 18:21:16,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:16,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320094564] [2025-03-16 18:21:16,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:16,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 18:21:16,231 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 18:21:16,231 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:16,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:16,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883378872] [2025-03-16 18:21:16,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:16,235 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) [2025-03-16 18:21:16,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:21:16,258 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 18:21:16,269 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 18:21:16,269 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:16,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:16,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:21:16,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:21:16,356 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:21:16,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:16,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320094564] [2025-03-16 18:21:16,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:16,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883378872] [2025-03-16 18:21:16,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883378872] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:16,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:16,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:21:16,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068952917] [2025-03-16 18:21:16,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:16,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:16,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:16,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:16,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:21:16,357 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-03-16 18:21:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:16,415 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2025-03-16 18:21:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 17 [2025-03-16 18:21:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:16,416 INFO L225 Difference]: With dead ends: 50 [2025-03-16 18:21:16,416 INFO L226 Difference]: Without dead ends: 38 [2025-03-16 18:21:16,416 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:21:16,417 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:16,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 77 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-16 18:21:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-03-16 18:21:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-16 18:21:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2025-03-16 18:21:16,428 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2025-03-16 18:21:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:16,428 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2025-03-16 18:21:16,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-03-16 18:21:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2025-03-16 18:21:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 18:21:16,429 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:16,429 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:16,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 18:21:16,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:16,630 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:16,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:16,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1540930980, now seen corresponding path program 1 times [2025-03-16 18:21:16,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:16,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409268164] [2025-03-16 18:21:16,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:16,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:16,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 18:21:16,643 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 18:21:16,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:16,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526680053] [2025-03-16 18:21:16,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:16,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:16,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:16,646 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) [2025-03-16 18:21:16,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:21:16,668 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 18:21:16,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 18:21:16,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:16,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:16,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:21:16,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 18:21:16,727 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:21:16,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:16,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409268164] [2025-03-16 18:21:16,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:16,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526680053] [2025-03-16 18:21:16,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526680053] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:16,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:16,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:21:16,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986832973] [2025-03-16 18:21:16,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:16,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:16,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:16,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:16,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:21:16,729 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (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) [2025-03-16 18:21:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:16,781 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2025-03-16 18:21:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (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 23 [2025-03-16 18:21:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:16,781 INFO L225 Difference]: With dead ends: 50 [2025-03-16 18:21:16,782 INFO L226 Difference]: Without dead ends: 48 [2025-03-16 18:21:16,782 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:21:16,782 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:16,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:16,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-16 18:21:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2025-03-16 18:21:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 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) [2025-03-16 18:21:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2025-03-16 18:21:16,787 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 23 [2025-03-16 18:21:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:16,788 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2025-03-16 18:21:16,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (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) [2025-03-16 18:21:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2025-03-16 18:21:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 18:21:16,788 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:16,788 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:16,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:16,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:16,989 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:16,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2124795744, now seen corresponding path program 1 times [2025-03-16 18:21:16,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:16,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429098297] [2025-03-16 18:21:16,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:16,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:16,993 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 18:21:17,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 18:21:17,000 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:17,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:17,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649125597] [2025-03-16 18:21:17,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:17,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:17,003 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) [2025-03-16 18:21:17,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:21:17,033 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 18:21:17,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 18:21:17,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:17,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:17,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 18:21:17,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-16 18:21:17,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-03-16 18:21:17,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:17,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429098297] [2025-03-16 18:21:17,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:17,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649125597] [2025-03-16 18:21:17,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649125597] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 18:21:17,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:21:17,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-03-16 18:21:17,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840508737] [2025-03-16 18:21:17,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:17,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:17,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:17,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:17,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:21:17,184 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (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) [2025-03-16 18:21:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:17,417 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2025-03-16 18:21:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:17,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (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 33 [2025-03-16 18:21:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:17,419 INFO L225 Difference]: With dead ends: 56 [2025-03-16 18:21:17,419 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 18:21:17,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:21:17,420 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:17,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 71 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:21:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 18:21:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2025-03-16 18:21:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-16 18:21:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2025-03-16 18:21:17,429 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 33 [2025-03-16 18:21:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:17,429 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2025-03-16 18:21:17,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (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) [2025-03-16 18:21:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2025-03-16 18:21:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 18:21:17,430 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:17,430 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] [2025-03-16 18:21:17,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:17,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:17,634 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:17,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:17,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1439013148, now seen corresponding path program 1 times [2025-03-16 18:21:17,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:17,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762700569] [2025-03-16 18:21:17,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:17,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-16 18:21:17,645 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 18:21:17,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:17,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-16 18:21:17,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:17,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762700569] [2025-03-16 18:21:17,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762700569] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:17,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:21:17,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:21:17,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809502521] [2025-03-16 18:21:17,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:17,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:21:17,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:17,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:21:17,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:21:17,737 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (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) [2025-03-16 18:21:17,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:17,774 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2025-03-16 18:21:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:21:17,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (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 39 [2025-03-16 18:21:17,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:17,776 INFO L225 Difference]: With dead ends: 61 [2025-03-16 18:21:17,776 INFO L226 Difference]: Without dead ends: 50 [2025-03-16 18:21:17,776 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 [2025-03-16 18:21:17,776 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:17,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:21:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-16 18:21:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-03-16 18:21:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 18:21:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2025-03-16 18:21:17,786 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 39 [2025-03-16 18:21:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:17,787 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2025-03-16 18:21:17,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (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) [2025-03-16 18:21:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2025-03-16 18:21:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 18:21:17,789 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:17,789 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:17,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-16 18:21:17,789 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:17,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2029649450, now seen corresponding path program 1 times [2025-03-16 18:21:17,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:17,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235088508] [2025-03-16 18:21:17,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:17,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:17,798 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 18:21:17,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 18:21:17,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:17,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:17,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043967307] [2025-03-16 18:21:17,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:17,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:17,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:17,825 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) [2025-03-16 18:21:17,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:21:17,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 18:21:17,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 18:21:17,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:17,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:17,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-16 18:21:17,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-16 18:21:18,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-16 18:21:18,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:18,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235088508] [2025-03-16 18:21:18,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:18,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043967307] [2025-03-16 18:21:18,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043967307] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:18,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:21:18,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2025-03-16 18:21:18,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283999349] [2025-03-16 18:21:18,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:18,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 18:21:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:18,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 18:21:18,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2025-03-16 18:21:18,843 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-16 18:21:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:19,276 INFO L93 Difference]: Finished difference Result 115 states and 160 transitions. [2025-03-16 18:21:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 18:21:19,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 51 [2025-03-16 18:21:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:19,278 INFO L225 Difference]: With dead ends: 115 [2025-03-16 18:21:19,278 INFO L226 Difference]: Without dead ends: 94 [2025-03-16 18:21:19,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2025-03-16 18:21:19,279 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:19,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 148 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:21:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-03-16 18:21:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2025-03-16 18:21:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.28) internal successors, (64), 55 states have internal predecessors, (64), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2025-03-16 18:21:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2025-03-16 18:21:19,294 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 51 [2025-03-16 18:21:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:19,294 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2025-03-16 18:21:19,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-16 18:21:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2025-03-16 18:21:19,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 18:21:19,295 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:19,295 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:19,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 18:21:19,500 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 [2025-03-16 18:21:19,500 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:19,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:19,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1070930246, now seen corresponding path program 1 times [2025-03-16 18:21:19,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:19,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153318089] [2025-03-16 18:21:19,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:19,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:19,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 18:21:19,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 18:21:19,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:19,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:19,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412657769] [2025-03-16 18:21:19,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:19,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:19,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:19,537 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) [2025-03-16 18:21:19,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 18:21:19,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 18:21:19,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 18:21:19,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:19,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:19,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-16 18:21:19,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-03-16 18:21:19,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-03-16 18:21:20,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:20,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153318089] [2025-03-16 18:21:20,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:20,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412657769] [2025-03-16 18:21:20,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412657769] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:20,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:21:20,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2025-03-16 18:21:20,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611170698] [2025-03-16 18:21:20,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:20,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 18:21:20,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:20,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 18:21:20,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-16 18:21:20,180 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2025-03-16 18:21:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:20,549 INFO L93 Difference]: Finished difference Result 141 states and 194 transitions. [2025-03-16 18:21:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 18:21:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 62 [2025-03-16 18:21:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:20,551 INFO L225 Difference]: With dead ends: 141 [2025-03-16 18:21:20,551 INFO L226 Difference]: Without dead ends: 114 [2025-03-16 18:21:20,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2025-03-16 18:21:20,552 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:20,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:21:20,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-03-16 18:21:20,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2025-03-16 18:21:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 50 states have (on average 1.22) internal successors, (61), 55 states have internal predecessors, (61), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2025-03-16 18:21:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2025-03-16 18:21:20,567 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 62 [2025-03-16 18:21:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:20,568 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2025-03-16 18:21:20,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2025-03-16 18:21:20,568 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2025-03-16 18:21:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-16 18:21:20,569 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:20,569 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:20,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:20,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:20,770 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:20,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1148385514, now seen corresponding path program 1 times [2025-03-16 18:21:20,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:20,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743043461] [2025-03-16 18:21:20,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:20,774 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-16 18:21:20,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 18:21:20,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:20,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-16 18:21:21,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:21,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743043461] [2025-03-16 18:21:21,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743043461] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:21:21,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448145323] [2025-03-16 18:21:21,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:21,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:21,020 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) [2025-03-16 18:21:21,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 18:21:21,042 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-16 18:21:21,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 18:21:21,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:21,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:21,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 18:21:21,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-16 18:21:21,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-16 18:21:21,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448145323] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:21,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:21:21,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-16 18:21:21,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107591155] [2025-03-16 18:21:21,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:21,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 18:21:21,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:21,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 18:21:21,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2025-03-16 18:21:21,395 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2025-03-16 18:21:21,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:21,518 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2025-03-16 18:21:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:21:21,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) Word has length 67 [2025-03-16 18:21:21,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:21,520 INFO L225 Difference]: With dead ends: 109 [2025-03-16 18:21:21,520 INFO L226 Difference]: Without dead ends: 83 [2025-03-16 18:21:21,520 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-03-16 18:21:21,520 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:21,520 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 162 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:21:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-16 18:21:21,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-03-16 18:21:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-16 18:21:21,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2025-03-16 18:21:21,537 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 67 [2025-03-16 18:21:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:21,538 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2025-03-16 18:21:21,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2025-03-16 18:21:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2025-03-16 18:21:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-16 18:21:21,539 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:21,540 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:21,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:21,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:21,744 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:21,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1657828488, now seen corresponding path program 2 times [2025-03-16 18:21:21,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:21,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102782977] [2025-03-16 18:21:21,744 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:21:21,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:21,750 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-16 18:21:21,768 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 18:21:21,768 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:21:21,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2025-03-16 18:21:22,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:22,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102782977] [2025-03-16 18:21:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102782977] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:21:22,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278881961] [2025-03-16 18:21:22,040 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:21:22,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:22,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:22,042 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) [2025-03-16 18:21:22,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 18:21:22,064 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-16 18:21:22,083 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 18:21:22,083 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:21:22,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:22,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 18:21:22,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2025-03-16 18:21:22,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2025-03-16 18:21:22,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278881961] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:22,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:21:22,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2025-03-16 18:21:22,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162375593] [2025-03-16 18:21:22,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:22,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 18:21:22,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:22,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 18:21:22,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2025-03-16 18:21:22,735 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2025-03-16 18:21:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:22,987 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2025-03-16 18:21:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 18:21:22,987 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) Word has length 79 [2025-03-16 18:21:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:22,988 INFO L225 Difference]: With dead ends: 143 [2025-03-16 18:21:22,988 INFO L226 Difference]: Without dead ends: 87 [2025-03-16 18:21:22,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2025-03-16 18:21:22,989 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:22,989 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 215 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:21:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-16 18:21:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2025-03-16 18:21:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.0625) internal successors, (51), 51 states have internal predecessors, (51), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-16 18:21:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2025-03-16 18:21:23,004 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 79 [2025-03-16 18:21:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:23,004 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2025-03-16 18:21:23,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2025-03-16 18:21:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2025-03-16 18:21:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-16 18:21:23,005 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:23,005 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:23,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 18:21:23,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:23,206 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:23,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:23,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1283829111, now seen corresponding path program 1 times [2025-03-16 18:21:23,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:23,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372133115] [2025-03-16 18:21:23,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:23,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:23,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-16 18:21:23,225 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 18:21:23,226 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:23,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 35 proven. 8 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2025-03-16 18:21:23,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:23,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372133115] [2025-03-16 18:21:23,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372133115] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:21:23,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375561228] [2025-03-16 18:21:23,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:23,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:23,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:23,336 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) [2025-03-16 18:21:23,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 18:21:23,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-16 18:21:23,378 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 18:21:23,378 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:23,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:23,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 18:21:23,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2025-03-16 18:21:23,453 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:21:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375561228] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:21:23,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:21:23,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2025-03-16 18:21:23,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729121369] [2025-03-16 18:21:23,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:21:23,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:21:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:23,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:21:23,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:21:23,454 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-16 18:21:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:23,536 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2025-03-16 18:21:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:21:23,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2025-03-16 18:21:23,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:23,537 INFO L225 Difference]: With dead ends: 101 [2025-03-16 18:21:23,537 INFO L226 Difference]: Without dead ends: 70 [2025-03-16 18:21:23,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:21:23,538 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 3 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:23,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 113 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:21:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-16 18:21:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2025-03-16 18:21:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-16 18:21:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2025-03-16 18:21:23,549 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 79 [2025-03-16 18:21:23,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:23,550 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2025-03-16 18:21:23,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-16 18:21:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2025-03-16 18:21:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-16 18:21:23,551 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:23,551 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:23,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:23,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 18:21:23,752 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:23,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash -342489677, now seen corresponding path program 2 times [2025-03-16 18:21:23,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:23,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608148690] [2025-03-16 18:21:23,755 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:21:23,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:23,759 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-16 18:21:23,771 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-16 18:21:23,775 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:21:23,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:23,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414351930] [2025-03-16 18:21:23,776 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:21:23,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:23,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:23,778 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) [2025-03-16 18:21:23,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 18:21:23,803 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-16 18:21:23,821 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-16 18:21:23,822 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:21:23,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:23,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-16 18:21:23,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 48 proven. 39 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2025-03-16 18:21:24,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 48 proven. 39 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2025-03-16 18:21:33,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608148690] [2025-03-16 18:21:33,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414351930] [2025-03-16 18:21:33,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414351930] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:33,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:21:33,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2025-03-16 18:21:33,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577805750] [2025-03-16 18:21:33,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:33,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-16 18:21:33,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:33,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-16 18:21:33,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2025-03-16 18:21:33,844 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2025-03-16 18:21:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:34,030 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2025-03-16 18:21:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 18:21:34,031 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) Word has length 84 [2025-03-16 18:21:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:34,031 INFO L225 Difference]: With dead ends: 80 [2025-03-16 18:21:34,031 INFO L226 Difference]: Without dead ends: 78 [2025-03-16 18:21:34,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2025-03-16 18:21:34,032 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:34,032 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 192 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:21:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-16 18:21:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-03-16 18:21:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 17 states have call successors, (17), 12 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-16 18:21:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2025-03-16 18:21:34,042 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 84 [2025-03-16 18:21:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:34,042 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2025-03-16 18:21:34,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2025-03-16 18:21:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2025-03-16 18:21:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-03-16 18:21:34,043 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:34,043 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:34,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:34,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 18:21:34,243 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:34,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1485193523, now seen corresponding path program 1 times [2025-03-16 18:21:34,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:34,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832101861] [2025-03-16 18:21:34,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:34,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:34,247 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 90 statements into 1 equivalence classes. [2025-03-16 18:21:34,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 90 of 90 statements. [2025-03-16 18:21:34,261 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:34,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:21:34,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479096716] [2025-03-16 18:21:34,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:34,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:34,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:34,265 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) [2025-03-16 18:21:34,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 18:21:34,292 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 90 statements into 1 equivalence classes. [2025-03-16 18:21:34,313 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 90 of 90 statements. [2025-03-16 18:21:34,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:34,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:34,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-16 18:21:34,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 29 proven. 65 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2025-03-16 18:21:34,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 29 proven. 65 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2025-03-16 18:21:35,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832101861] [2025-03-16 18:21:35,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:21:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479096716] [2025-03-16 18:21:35,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479096716] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:35,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:21:35,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2025-03-16 18:21:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668130044] [2025-03-16 18:21:35,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:35,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 18:21:35,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:35,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 18:21:35,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2025-03-16 18:21:35,126 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 25 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 14 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2025-03-16 18:21:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:35,298 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2025-03-16 18:21:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 18:21:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 14 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) Word has length 90 [2025-03-16 18:21:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:35,300 INFO L225 Difference]: With dead ends: 84 [2025-03-16 18:21:35,300 INFO L226 Difference]: Without dead ends: 80 [2025-03-16 18:21:35,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2025-03-16 18:21:35,301 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:35,301 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 190 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:21:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-16 18:21:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2025-03-16 18:21:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.0) internal successors, (50), 50 states have internal predecessors, (50), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-16 18:21:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2025-03-16 18:21:35,311 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 90 [2025-03-16 18:21:35,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:35,311 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2025-03-16 18:21:35,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 14 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2025-03-16 18:21:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2025-03-16 18:21:35,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-16 18:21:35,312 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:21:35,312 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:35,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 18:21:35,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-16 18:21:35,512 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:21:35,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:21:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1964455095, now seen corresponding path program 1 times [2025-03-16 18:21:35,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:21:35,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029298537] [2025-03-16 18:21:35,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:35,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:21:35,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 95 statements into 1 equivalence classes. [2025-03-16 18:21:35,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 95 of 95 statements. [2025-03-16 18:21:35,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:35,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-03-16 18:21:35,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:21:35,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029298537] [2025-03-16 18:21:35,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029298537] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:21:35,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048761034] [2025-03-16 18:21:35,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:21:35,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:21:35,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:21:35,770 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) [2025-03-16 18:21:35,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 18:21:35,806 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 95 statements into 1 equivalence classes. [2025-03-16 18:21:35,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 95 of 95 statements. [2025-03-16 18:21:35,826 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:21:35,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:21:35,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-16 18:21:35,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:21:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 31 proven. 68 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2025-03-16 18:21:36,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:21:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 31 proven. 68 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2025-03-16 18:21:37,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048761034] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:21:37,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:21:37,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 29 [2025-03-16 18:21:37,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679340362] [2025-03-16 18:21:37,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:21:37,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-16 18:21:37,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:21:37,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-16 18:21:37,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2025-03-16 18:21:37,192 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 29 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 16 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 16 states have call successors, (47) [2025-03-16 18:21:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:21:37,462 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2025-03-16 18:21:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 18:21:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 16 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 16 states have call successors, (47) Word has length 95 [2025-03-16 18:21:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:21:37,463 INFO L225 Difference]: With dead ends: 80 [2025-03-16 18:21:37,463 INFO L226 Difference]: Without dead ends: 0 [2025-03-16 18:21:37,464 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 18:21:37,464 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:21:37,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 281 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:21:37,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-16 18:21:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-16 18:21:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:21:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-16 18:21:37,465 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 95 [2025-03-16 18:21:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:21:37,465 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-16 18:21:37,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 16 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 16 states have call successors, (47) [2025-03-16 18:21:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-16 18:21:37,465 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-16 18:21:37,468 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 18:21:37,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 18:21:37,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-16 18:21:37,671 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:21:37,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-16 18:21:38,019 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 18:21:38,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 06:21:38 BoogieIcfgContainer [2025-03-16 18:21:38,029 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 18:21:38,029 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 18:21:38,029 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 18:21:38,030 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 18:21:38,030 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:21:15" (3/4) ... [2025-03-16 18:21:38,031 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-16 18:21:38,035 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-03-16 18:21:38,038 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2025-03-16 18:21:38,038 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2025-03-16 18:21:38,038 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-16 18:21:38,039 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-16 18:21:38,039 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-16 18:21:38,094 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-16 18:21:38,095 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-16 18:21:38,095 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 18:21:38,095 INFO L158 Benchmark]: Toolchain (without parser) took 22787.54ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 109.7MB in the beginning and 305.9MB in the end (delta: -196.2MB). Peak memory consumption was 195.8MB. Max. memory is 16.1GB. [2025-03-16 18:21:38,095 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory was 126.0MB in the beginning and 125.6MB in the end (delta: 307.6kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:21:38,095 INFO L158 Benchmark]: CACSL2BoogieTranslator took 122.46ms. Allocated memory is still 142.6MB. Free memory was 109.7MB in the beginning and 97.7MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:21:38,096 INFO L158 Benchmark]: Boogie Procedure Inliner took 15.50ms. Allocated memory is still 142.6MB. Free memory was 97.7MB in the beginning and 96.5MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:21:38,096 INFO L158 Benchmark]: Boogie Preprocessor took 15.75ms. Allocated memory is still 142.6MB. Free memory was 96.5MB in the beginning and 95.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:21:38,096 INFO L158 Benchmark]: IcfgBuilder took 202.37ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 83.4MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:21:38,096 INFO L158 Benchmark]: TraceAbstraction took 22360.93ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 83.4MB in the beginning and 120.4MB in the end (delta: -37.0MB). Peak memory consumption was 162.2MB. Max. memory is 16.1GB. [2025-03-16 18:21:38,096 INFO L158 Benchmark]: Witness Printer took 65.27ms. Allocated memory is still 343.9MB. Free memory was 120.4MB in the beginning and 305.9MB in the end (delta: -185.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:21:38,097 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory was 126.0MB in the beginning and 125.6MB in the end (delta: 307.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 122.46ms. Allocated memory is still 142.6MB. Free memory was 109.7MB in the beginning and 97.7MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 15.50ms. Allocated memory is still 142.6MB. Free memory was 97.7MB in the beginning and 96.5MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.75ms. Allocated memory is still 142.6MB. Free memory was 96.5MB in the beginning and 95.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 202.37ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 83.4MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 22360.93ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 83.4MB in the beginning and 120.4MB in the end (delta: -37.0MB). Peak memory consumption was 162.2MB. Max. memory is 16.1GB. * Witness Printer took 65.27ms. Allocated memory is still 343.9MB. Free memory was 120.4MB in the beginning and 305.9MB in the end (delta: -185.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 41 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 22.0s, OverallIterations: 15, TraceHistogramMax: 17, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 165 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 124 mSDsluCounter, 1931 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1559 mSDsCounter, 264 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2122 IncrementalHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 264 mSolverCounterUnsat, 372 mSDtfsCounter, 2122 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1302 GetRequests, 1111 SyntacticMatches, 6 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=8, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 44 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 1425 NumberOfCodeBlocks, 1425 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1599 ConstructedInterpolants, 0 QuantifiedInterpolants, 15347 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1884 ConjunctsInSsa, 275 ConjunctsInUnsatCore, 27 InterpolantComputations, 8 PerfectInterpolantSequences, 6217/6783 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Location Invariant Derived location invariant: (((((((((2 == p) && (q == 0)) && (A <= 2)) && (A == r)) && (1 <= r)) && (B == 1)) && (2 == d)) || (((((((d == 1) && (p == 1)) && (q == 0)) && (A <= 2)) && (A == r)) && (B == 1)) && (0 <= A))) || ((((((p == 4) && (q == 0)) && (A == r)) && (d == 4)) && (2 == r)) && (B == 1))) - InvariantResult [Line: 22]: Location Invariant Derived location invariant: ((((((((((d == 1) && (p == 1)) && (q == 1)) && (((long long) r + 1) == A)) && (B == 1)) || (((((d == 1) && (p == 1)) && (q == 0)) && (A == r)) && (B == 1))) || (((((2 == p) && (q == 0)) && (A == r)) && (B == 1)) && (2 == d))) || ((((((2 == A) && (2 == p)) && (r == 0)) && (2 == q)) && (B == 1)) && (2 == d))) || ((((((d == 1) && (p == 1)) && (2 == A)) && (r == 0)) && (2 == q)) && (B == 1))) || ((((((p == 4) && (2 == A)) && (q == 0)) && (d == 4)) && (2 == r)) && (B == 1))) RESULT: Ultimate proved your program to be correct! [2025-03-16 18:21:38,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE