./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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/array-examples/sorting_selectionsort_ground-1.i -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 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 08:58:54,314 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 08:58:54,372 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 08:58:54,377 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 08:58:54,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 08:58:54,399 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 08:58:54,399 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 08:58:54,400 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 08:58:54,400 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 08:58:54,400 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 08:58:54,401 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 08:58:54,401 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 08:58:54,401 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 08:58:54,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 08:58:54,402 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 08:58:54,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 08:58:54,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 08:58:54,402 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 08:58:54,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 08:58:54,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 08:58:54,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 08:58:54,402 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 08:58:54,402 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 08:58:54,402 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 08:58:54,402 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 08:58:54,403 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 08:58:54,403 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 08:58:54,403 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 08:58:54,403 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 08:58:54,403 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 08:58:54,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 08:58:54,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 08:58:54,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 08:58:54,403 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 08:58:54,404 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 08:58:54,404 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 08:58:54,404 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 08:58:54,404 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 08:58:54,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 08:58:54,404 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 08:58:54,404 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 08:58:54,404 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 08:58:54,404 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 08:58:54,404 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 -> 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a [2025-03-03 08:58:54,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 08:58:54,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 08:58:54,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 08:58:54,642 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 08:58:54,642 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 08:58:54,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2025-03-03 08:58:55,765 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62c9c0003/64e5c3c6aa3c4c5eafb821d967e3bb64/FLAG1f96cf844 [2025-03-03 08:58:55,985 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 08:58:55,986 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2025-03-03 08:58:56,004 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62c9c0003/64e5c3c6aa3c4c5eafb821d967e3bb64/FLAG1f96cf844 [2025-03-03 08:58:56,336 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62c9c0003/64e5c3c6aa3c4c5eafb821d967e3bb64 [2025-03-03 08:58:56,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 08:58:56,339 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 08:58:56,341 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 08:58:56,341 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 08:58:56,344 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 08:58:56,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab5dea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56, skipping insertion in model container [2025-03-03 08:58:56,347 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,360 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 08:58:56,466 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/array-examples/sorting_selectionsort_ground-1.i[823,836] [2025-03-03 08:58:56,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 08:58:56,494 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 08:58:56,501 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/array-examples/sorting_selectionsort_ground-1.i[823,836] [2025-03-03 08:58:56,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 08:58:56,521 INFO L204 MainTranslator]: Completed translation [2025-03-03 08:58:56,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56 WrapperNode [2025-03-03 08:58:56,522 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 08:58:56,523 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 08:58:56,523 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 08:58:56,523 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 08:58:56,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,533 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,545 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 93 [2025-03-03 08:58:56,545 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 08:58:56,546 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 08:58:56,546 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 08:58:56,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 08:58:56,552 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,558 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,567 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-03 08:58:56,567 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,567 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,571 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,572 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,572 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 08:58:56,575 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 08:58:56,575 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 08:58:56,575 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 08:58:56,576 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (1/1) ... [2025-03-03 08:58:56,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 08:58:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:56,598 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) [2025-03-03 08:58:56,599 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 [2025-03-03 08:58:56,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 08:58:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 08:58:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 08:58:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 08:58:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 08:58:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 08:58:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 08:58:56,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 08:58:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 08:58:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 08:58:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 08:58:56,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 08:58:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 08:58:56,667 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 08:58:56,668 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 08:58:56,788 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L17: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-03 08:58:56,800 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2025-03-03 08:58:56,800 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 08:58:56,811 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 08:58:56,811 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 08:58:56,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 08:58:56 BoogieIcfgContainer [2025-03-03 08:58:56,811 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 08:58:56,813 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 08:58:56,814 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 08:58:56,817 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 08:58:56,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 08:58:56" (1/3) ... [2025-03-03 08:58:56,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b9d79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:58:56, skipping insertion in model container [2025-03-03 08:58:56,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 08:58:56" (2/3) ... [2025-03-03 08:58:56,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b9d79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:58:56, skipping insertion in model container [2025-03-03 08:58:56,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 08:58:56" (3/3) ... [2025-03-03 08:58:56,820 INFO L128 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2025-03-03 08:58:56,834 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 08:58:56,837 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sorting_selectionsort_ground-1.i that has 2 procedures, 29 locations, 1 initial locations, 8 loop locations, and 1 error locations. [2025-03-03 08:58:56,879 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 08:58:56,889 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;@77fec1a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 08:58:56,889 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 08:58:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 08:58:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 08:58:56,896 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:56,896 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:56,897 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:56,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1055744568, now seen corresponding path program 1 times [2025-03-03 08:58:56,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:56,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453436936] [2025-03-03 08:58:56,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:56,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:56,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 08:58:56,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 08:58:56,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:56,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 08:58:57,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:57,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453436936] [2025-03-03 08:58:57,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453436936] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 08:58:57,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 08:58:57,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 08:58:57,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736808614] [2025-03-03 08:58:57,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 08:58:57,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 08:58:57,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:57,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 08:58:57,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 08:58:57,046 INFO L87 Difference]: Start difference. First operand has 29 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:57,068 INFO L93 Difference]: Finished difference Result 56 states and 83 transitions. [2025-03-03 08:58:57,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 08:58:57,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-03 08:58:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:57,075 INFO L225 Difference]: With dead ends: 56 [2025-03-03 08:58:57,075 INFO L226 Difference]: Without dead ends: 27 [2025-03-03 08:58:57,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 08:58:57,079 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:57,079 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-03 08:58:57,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-03-03 08:58:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 08:58:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2025-03-03 08:58:57,102 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 10 [2025-03-03 08:58:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:57,102 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2025-03-03 08:58:57,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 08:58:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2025-03-03 08:58:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 08:58:57,103 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:57,103 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:57,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 08:58:57,103 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:57,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:57,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1206388838, now seen corresponding path program 1 times [2025-03-03 08:58:57,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:57,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776046432] [2025-03-03 08:58:57,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:57,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:57,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 08:58:57,119 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 08:58:57,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:57,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 08:58:57,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:57,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776046432] [2025-03-03 08:58:57,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776046432] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:57,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284767714] [2025-03-03 08:58:57,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:57,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:57,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:57,189 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) [2025-03-03 08:58:57,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 08:58:57,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 08:58:57,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 08:58:57,237 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:57,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-03 08:58:57,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 08:58:57,260 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 08:58:57,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284767714] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 08:58:57,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 08:58:57,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-03 08:58:57,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070023803] [2025-03-03 08:58:57,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 08:58:57,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 08:58:57,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:57,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 08:58:57,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 08:58:57,261 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2025-03-03 08:58:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:57,303 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2025-03-03 08:58:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 08:58:57,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2025-03-03 08:58:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:57,305 INFO L225 Difference]: With dead ends: 50 [2025-03-03 08:58:57,305 INFO L226 Difference]: Without dead ends: 40 [2025-03-03 08:58:57,306 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 08:58:57,306 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:57,306 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 54 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-03 08:58:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2025-03-03 08:58:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 08:58:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2025-03-03 08:58:57,311 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 11 [2025-03-03 08:58:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:57,311 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2025-03-03 08:58:57,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2025-03-03 08:58:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2025-03-03 08:58:57,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-03 08:58:57,311 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:57,311 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:57,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 08:58:57,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:57,512 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:57,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:57,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1616886517, now seen corresponding path program 1 times [2025-03-03 08:58:57,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:57,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396389437] [2025-03-03 08:58:57,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:57,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:57,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 08:58:57,532 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 08:58:57,532 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:57,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 08:58:57,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:57,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396389437] [2025-03-03 08:58:57,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396389437] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:57,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092199317] [2025-03-03 08:58:57,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:57,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:57,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:57,597 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) [2025-03-03 08:58:57,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 08:58:57,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 08:58:57,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 08:58:57,648 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:57,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 08:58:57,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 08:58:57,659 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 08:58:57,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092199317] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 08:58:57,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 08:58:57,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-03 08:58:57,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398232988] [2025-03-03 08:58:57,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 08:58:57,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 08:58:57,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:57,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 08:58:57,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 08:58:57,660 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2025-03-03 08:58:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:57,681 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2025-03-03 08:58:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 08:58:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 14 [2025-03-03 08:58:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:57,682 INFO L225 Difference]: With dead ends: 55 [2025-03-03 08:58:57,682 INFO L226 Difference]: Without dead ends: 32 [2025-03-03 08:58:57,683 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 08:58:57,684 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:57,684 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 59 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-03 08:58:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-03-03 08:58:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 08:58:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2025-03-03 08:58:57,692 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 14 [2025-03-03 08:58:57,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:57,692 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2025-03-03 08:58:57,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2025-03-03 08:58:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2025-03-03 08:58:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-03 08:58:57,692 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:57,692 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:57,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 08:58:57,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-03 08:58:57,894 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:57,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:57,894 INFO L85 PathProgramCache]: Analyzing trace with hash -935270444, now seen corresponding path program 1 times [2025-03-03 08:58:57,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:57,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035412863] [2025-03-03 08:58:57,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:57,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:57,903 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 08:58:57,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 08:58:57,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:57,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 08:58:57,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035412863] [2025-03-03 08:58:57,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035412863] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974258402] [2025-03-03 08:58:57,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:57,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:57,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:57,949 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) [2025-03-03 08:58:57,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 08:58:57,985 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 08:58:57,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 08:58:57,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:57,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:57,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 08:58:57,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 08:58:58,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:58:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 08:58:58,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974258402] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:58:58,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:58:58,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-03 08:58:58,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417393681] [2025-03-03 08:58:58,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:58:58,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 08:58:58,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:58,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 08:58:58,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 08:58:58,034 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2025-03-03 08:58:58,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:58,046 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2025-03-03 08:58:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 08:58:58,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 14 [2025-03-03 08:58:58,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:58,047 INFO L225 Difference]: With dead ends: 63 [2025-03-03 08:58:58,048 INFO L226 Difference]: Without dead ends: 35 [2025-03-03 08:58:58,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 08:58:58,048 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:58,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 104 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:58,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-03 08:58:58,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-03-03 08:58:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 08:58:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2025-03-03 08:58:58,055 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 14 [2025-03-03 08:58:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:58,056 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2025-03-03 08:58:58,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2025-03-03 08:58:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2025-03-03 08:58:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-03 08:58:58,056 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:58,056 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:58,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 08:58:58,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:58,257 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:58,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1851054002, now seen corresponding path program 2 times [2025-03-03 08:58:58,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:58,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715392910] [2025-03-03 08:58:58,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 08:58:58,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:58,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-03 08:58:58,274 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 17 statements. [2025-03-03 08:58:58,274 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-03 08:58:58,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 08:58:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:58,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715392910] [2025-03-03 08:58:58,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715392910] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 08:58:58,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 08:58:58,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 08:58:58,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287484626] [2025-03-03 08:58:58,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 08:58:58,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 08:58:58,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:58,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 08:58:58,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 08:58:58,330 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-03 08:58:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:58,367 INFO L93 Difference]: Finished difference Result 82 states and 119 transitions. [2025-03-03 08:58:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 08:58:58,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2025-03-03 08:58:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:58,368 INFO L225 Difference]: With dead ends: 82 [2025-03-03 08:58:58,368 INFO L226 Difference]: Without dead ends: 55 [2025-03-03 08:58:58,369 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 08:58:58,369 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:58,369 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-03 08:58:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2025-03-03 08:58:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 08:58:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 49 transitions. [2025-03-03 08:58:58,373 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 49 transitions. Word has length 17 [2025-03-03 08:58:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:58,373 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 49 transitions. [2025-03-03 08:58:58,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-03 08:58:58,373 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 49 transitions. [2025-03-03 08:58:58,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-03 08:58:58,374 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:58,374 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:58,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-03 08:58:58,374 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:58,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:58,374 INFO L85 PathProgramCache]: Analyzing trace with hash 620308152, now seen corresponding path program 1 times [2025-03-03 08:58:58,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:58,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750004223] [2025-03-03 08:58:58,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:58,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:58,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 08:58:58,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 08:58:58,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:58,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-03 08:58:58,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:58,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750004223] [2025-03-03 08:58:58,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750004223] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 08:58:58,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 08:58:58,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 08:58:58,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651901087] [2025-03-03 08:58:58,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 08:58:58,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 08:58:58,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:58,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 08:58:58,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 08:58:58,466 INFO L87 Difference]: Start difference. First operand 36 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2025-03-03 08:58:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:58,510 INFO L93 Difference]: Finished difference Result 79 states and 114 transitions. [2025-03-03 08:58:58,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 08:58:58,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 20 [2025-03-03 08:58:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:58,512 INFO L225 Difference]: With dead ends: 79 [2025-03-03 08:58:58,512 INFO L226 Difference]: Without dead ends: 52 [2025-03-03 08:58:58,512 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 08:58:58,512 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:58,513 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 76 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-03-03 08:58:58,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2025-03-03 08:58:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 08:58:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2025-03-03 08:58:58,519 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 20 [2025-03-03 08:58:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:58,519 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2025-03-03 08:58:58,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2025-03-03 08:58:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2025-03-03 08:58:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-03 08:58:58,520 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:58,520 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:58,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-03 08:58:58,521 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:58,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash 472485210, now seen corresponding path program 1 times [2025-03-03 08:58:58,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:58,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328149105] [2025-03-03 08:58:58,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:58,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:58,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 08:58:58,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 08:58:58,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:58,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 08:58:58,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:58,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328149105] [2025-03-03 08:58:58,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328149105] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:58,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957672670] [2025-03-03 08:58:58,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:58,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:58,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:58,587 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) [2025-03-03 08:58:58,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 08:58:58,616 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 08:58:58,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 08:58:58,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:58,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:58,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 08:58:58,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 08:58:58,643 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:58:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 08:58:58,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957672670] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:58:58,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:58:58,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-03 08:58:58,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801375149] [2025-03-03 08:58:58,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:58:58,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 08:58:58,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:58,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 08:58:58,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-03 08:58:58,696 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2025-03-03 08:58:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:58,713 INFO L93 Difference]: Finished difference Result 93 states and 134 transitions. [2025-03-03 08:58:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 08:58:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 20 [2025-03-03 08:58:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:58,714 INFO L225 Difference]: With dead ends: 93 [2025-03-03 08:58:58,714 INFO L226 Difference]: Without dead ends: 53 [2025-03-03 08:58:58,714 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-03 08:58:58,714 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:58,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-03 08:58:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2025-03-03 08:58:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 08:58:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2025-03-03 08:58:58,720 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 20 [2025-03-03 08:58:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:58,720 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2025-03-03 08:58:58,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2025-03-03 08:58:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2025-03-03 08:58:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-03 08:58:58,721 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:58,721 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:58,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 08:58:58,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:58,928 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:58,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:58,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1619962010, now seen corresponding path program 2 times [2025-03-03 08:58:58,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:58,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510606159] [2025-03-03 08:58:58,929 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 08:58:58,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:58,937 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-03 08:58:58,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 26 statements. [2025-03-03 08:58:58,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-03 08:58:58,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-03-03 08:58:59,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510606159] [2025-03-03 08:58:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510606159] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 08:58:59,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 08:58:59,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-03 08:58:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308243048] [2025-03-03 08:58:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 08:58:59,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 08:58:59,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:59,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 08:58:59,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-03 08:58:59,056 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2025-03-03 08:58:59,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:59,144 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2025-03-03 08:58:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 08:58:59,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 26 [2025-03-03 08:58:59,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:59,145 INFO L225 Difference]: With dead ends: 64 [2025-03-03 08:58:59,145 INFO L226 Difference]: Without dead ends: 62 [2025-03-03 08:58:59,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-03 08:58:59,146 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:59,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 112 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 08:58:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-03 08:58:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2025-03-03 08:58:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 52 states have internal predecessors, (68), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 08:58:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2025-03-03 08:58:59,151 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 26 [2025-03-03 08:58:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:59,151 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2025-03-03 08:58:59,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2025-03-03 08:58:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2025-03-03 08:58:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 08:58:59,152 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:59,152 INFO L218 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:59,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-03 08:58:59,152 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:59,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:59,153 INFO L85 PathProgramCache]: Analyzing trace with hash -258041941, now seen corresponding path program 1 times [2025-03-03 08:58:59,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:59,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559268396] [2025-03-03 08:58:59,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:59,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:59,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 08:58:59,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 08:58:59,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:59,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 08:58:59,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559268396] [2025-03-03 08:58:59,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559268396] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791351251] [2025-03-03 08:58:59,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 08:58:59,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:59,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:59,327 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) [2025-03-03 08:58:59,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 08:58:59,367 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 08:58:59,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 08:58:59,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 08:58:59,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:59,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 08:58:59,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:58:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 08:58:59,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:58:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 08:58:59,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791351251] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:58:59,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:58:59,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-03 08:58:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426648658] [2025-03-03 08:58:59,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:58:59,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 08:58:59,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:58:59,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 08:58:59,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 08:58:59,612 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 08:58:59,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:58:59,635 INFO L93 Difference]: Finished difference Result 115 states and 162 transitions. [2025-03-03 08:58:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 08:58:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2025-03-03 08:58:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:58:59,636 INFO L225 Difference]: With dead ends: 115 [2025-03-03 08:58:59,636 INFO L226 Difference]: Without dead ends: 70 [2025-03-03 08:58:59,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 08:58:59,637 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 08:58:59,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 08:58:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-03 08:58:59,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2025-03-03 08:58:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 64 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 08:58:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2025-03-03 08:58:59,643 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 33 [2025-03-03 08:58:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:58:59,643 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2025-03-03 08:58:59,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 08:58:59,643 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2025-03-03 08:58:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 08:58:59,643 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:58:59,644 INFO L218 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:58:59,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 08:58:59,848 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 [2025-03-03 08:58:59,848 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:58:59,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:58:59,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1570529579, now seen corresponding path program 2 times [2025-03-03 08:58:59,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:58:59,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45295734] [2025-03-03 08:58:59,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 08:58:59,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:58:59,861 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-03-03 08:58:59,870 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 08:58:59,870 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 08:58:59,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:58:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2025-03-03 08:58:59,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:58:59,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45295734] [2025-03-03 08:58:59,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45295734] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:58:59,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860942593] [2025-03-03 08:58:59,961 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 08:58:59,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:58:59,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:58:59,963 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) [2025-03-03 08:58:59,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 08:59:00,020 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-03-03 08:59:00,048 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 08:59:00,049 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 08:59:00,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:00,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 08:59:00,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:59:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 08:59:00,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:59:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 08:59:01,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860942593] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:59:01,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:59:01,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 25, 25] total 51 [2025-03-03 08:59:01,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608112681] [2025-03-03 08:59:01,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:59:01,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-03 08:59:01,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:59:01,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-03 08:59:01,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1135, Invalid=1415, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 08:59:01,014 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 08:59:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:59:01,138 INFO L93 Difference]: Finished difference Result 151 states and 217 transitions. [2025-03-03 08:59:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-03-03 08:59:01,138 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2025-03-03 08:59:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:59:01,140 INFO L225 Difference]: With dead ends: 151 [2025-03-03 08:59:01,140 INFO L226 Difference]: Without dead ends: 106 [2025-03-03 08:59:01,141 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1145, Invalid=1611, Unknown=0, NotChecked=0, Total=2756 [2025-03-03 08:59:01,142 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 08:59:01,143 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 227 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 08:59:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-03 08:59:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2025-03-03 08:59:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 92 states have (on average 1.1956521739130435) internal successors, (110), 93 states have internal predecessors, (110), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 08:59:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2025-03-03 08:59:01,153 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 45 [2025-03-03 08:59:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:59:01,153 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2025-03-03 08:59:01,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 08:59:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2025-03-03 08:59:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-03 08:59:01,154 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:59:01,154 INFO L218 NwaCegarLoop]: trace histogram [46, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:59:01,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 08:59:01,355 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 [2025-03-03 08:59:01,355 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:59:01,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:59:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash -122250416, now seen corresponding path program 3 times [2025-03-03 08:59:01,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:59:01,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825735443] [2025-03-03 08:59:01,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 08:59:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:59:01,378 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 72 statements into 24 equivalence classes. [2025-03-03 08:59:01,394 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 30 of 72 statements. [2025-03-03 08:59:01,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 08:59:01,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2025-03-03 08:59:01,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:59:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825735443] [2025-03-03 08:59:01,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825735443] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:59:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001386983] [2025-03-03 08:59:01,447 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 08:59:01,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:59:01,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:59:01,449 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) [2025-03-03 08:59:01,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 08:59:01,521 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 72 statements into 24 equivalence classes. [2025-03-03 08:59:01,536 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 30 of 72 statements. [2025-03-03 08:59:01,536 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 08:59:01,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:01,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-03 08:59:01,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:59:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2025-03-03 08:59:01,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:59:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2025-03-03 08:59:01,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001386983] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:59:01,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:59:01,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-03 08:59:01,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147295873] [2025-03-03 08:59:01,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:59:01,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 08:59:01,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:59:01,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 08:59:01,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-03 08:59:01,592 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 08:59:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:59:01,714 INFO L93 Difference]: Finished difference Result 192 states and 261 transitions. [2025-03-03 08:59:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 08:59:01,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 72 [2025-03-03 08:59:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:59:01,715 INFO L225 Difference]: With dead ends: 192 [2025-03-03 08:59:01,715 INFO L226 Difference]: Without dead ends: 155 [2025-03-03 08:59:01,716 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2025-03-03 08:59:01,716 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 114 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 08:59:01,716 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 103 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 08:59:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-03-03 08:59:01,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 139. [2025-03-03 08:59:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 131 states have (on average 1.2290076335877862) internal successors, (161), 132 states have internal predecessors, (161), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 08:59:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2025-03-03 08:59:01,731 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 72 [2025-03-03 08:59:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:59:01,732 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2025-03-03 08:59:01,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 08:59:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2025-03-03 08:59:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-03 08:59:01,733 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:59:01,733 INFO L218 NwaCegarLoop]: trace histogram [46, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:59:01,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 08:59:01,935 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 [2025-03-03 08:59:01,935 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:59:01,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:59:01,936 INFO L85 PathProgramCache]: Analyzing trace with hash 916850576, now seen corresponding path program 4 times [2025-03-03 08:59:01,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:59:01,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738344025] [2025-03-03 08:59:01,936 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 08:59:01,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:59:01,956 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 84 statements into 2 equivalence classes. [2025-03-03 08:59:02,004 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 08:59:02,004 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 08:59:02,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2025-03-03 08:59:02,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:59:02,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738344025] [2025-03-03 08:59:02,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738344025] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:59:02,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021175162] [2025-03-03 08:59:02,168 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 08:59:02,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:59:02,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:59:02,173 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) [2025-03-03 08:59:02,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 08:59:02,257 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 84 statements into 2 equivalence classes. [2025-03-03 08:59:02,313 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 08:59:02,314 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 08:59:02,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:02,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-03 08:59:02,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 08:59:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 08:59:03,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 08:59:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 2 proven. 1081 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-03 08:59:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021175162] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 08:59:05,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 08:59:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 49, 49] total 104 [2025-03-03 08:59:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410866590] [2025-03-03 08:59:05,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 08:59:05,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2025-03-03 08:59:05,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 08:59:05,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2025-03-03 08:59:05,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4597, Invalid=6115, Unknown=0, NotChecked=0, Total=10712 [2025-03-03 08:59:05,290 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand has 104 states, 104 states have (on average 1.3269230769230769) internal successors, (138), 104 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 08:59:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 08:59:05,567 INFO L93 Difference]: Finished difference Result 287 states and 404 transitions. [2025-03-03 08:59:05,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2025-03-03 08:59:05,567 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.3269230769230769) internal successors, (138), 104 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 84 [2025-03-03 08:59:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 08:59:05,568 INFO L225 Difference]: With dead ends: 287 [2025-03-03 08:59:05,568 INFO L226 Difference]: Without dead ends: 197 [2025-03-03 08:59:05,571 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4667, Invalid=7543, Unknown=0, NotChecked=0, Total=12210 [2025-03-03 08:59:05,571 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 08:59:05,571 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 279 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 08:59:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2025-03-03 08:59:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2025-03-03 08:59:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 185 states have (on average 1.172972972972973) internal successors, (217), 186 states have internal predecessors, (217), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 08:59:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 227 transitions. [2025-03-03 08:59:05,578 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 227 transitions. Word has length 84 [2025-03-03 08:59:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 08:59:05,579 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 227 transitions. [2025-03-03 08:59:05,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.3269230769230769) internal successors, (138), 104 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 08:59:05,579 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 227 transitions. [2025-03-03 08:59:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2025-03-03 08:59:05,580 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 08:59:05,580 INFO L218 NwaCegarLoop]: trace histogram [94, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 08:59:05,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 08:59:05,780 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 [2025-03-03 08:59:05,780 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 08:59:05,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 08:59:05,781 INFO L85 PathProgramCache]: Analyzing trace with hash 699135947, now seen corresponding path program 5 times [2025-03-03 08:59:05,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 08:59:05,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797092272] [2025-03-03 08:59:05,781 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 08:59:05,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 08:59:05,811 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 135 statements into 48 equivalence classes. [2025-03-03 08:59:06,511 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) and asserted 135 of 135 statements. [2025-03-03 08:59:06,511 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2025-03-03 08:59:06,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 08:59:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4539 backedges. 2 proven. 4465 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-03-03 08:59:10,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 08:59:10,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797092272] [2025-03-03 08:59:10,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797092272] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 08:59:10,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4634797] [2025-03-03 08:59:10,674 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 08:59:10,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 08:59:10,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 08:59:10,675 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) [2025-03-03 08:59:10,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 08:59:10,790 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 135 statements into 48 equivalence classes.