./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --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/nla-digbench/egcd3-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:41:46,635 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:41:46,690 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:41:46,696 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:41:46,696 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:41:46,715 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:41:46,717 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:41:46,717 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:41:46,717 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:41:46,717 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:41:46,718 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:41:46,718 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:41:46,718 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:41:46,718 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:41:46,719 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:41:46,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:41:46,719 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:41:46,719 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:41:46,719 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:41:46,719 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:41:46,719 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:41:46,719 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:41:46,720 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:41:46,720 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:41:46,720 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:41:46,720 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:41:46,720 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:41:46,720 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:41:46,720 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:41:46,720 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:41:46,720 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:41:46,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:41:46,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:41:46,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:41:46,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:41:46,721 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:41:46,721 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:41:46,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:41:46,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:41:46,721 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:41:46,721 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:41:46,721 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:41:46,721 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:41:46,721 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 -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2025-03-03 13:41:46,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:41:46,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:41:46,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:41:46,939 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:41:46,939 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:41:46,941 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2025-03-03 13:41:48,083 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4abe139a0/be0bc4d5e9ab46528d8bf2cb728c7c53/FLAG703a250ef [2025-03-03 13:41:48,273 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:41:48,274 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2025-03-03 13:41:48,279 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4abe139a0/be0bc4d5e9ab46528d8bf2cb728c7c53/FLAG703a250ef [2025-03-03 13:41:48,296 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4abe139a0/be0bc4d5e9ab46528d8bf2cb728c7c53 [2025-03-03 13:41:48,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:41:48,300 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:41:48,302 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:41:48,302 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:41:48,306 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:41:48,307 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,308 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178c604e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48, skipping insertion in model container [2025-03-03 13:41:48,308 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,322 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:41:48,434 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2025-03-03 13:41:48,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:41:48,463 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:41:48,470 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2025-03-03 13:41:48,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:41:48,488 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:41:48,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48 WrapperNode [2025-03-03 13:41:48,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:41:48,491 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:41:48,491 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:41:48,491 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:41:48,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,501 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,514 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2025-03-03 13:41:48,514 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:41:48,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:41:48,515 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:41:48,515 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:41:48,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,525 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,534 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 13:41:48,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,540 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,541 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,542 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,547 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:41:48,548 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:41:48,550 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:41:48,550 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:41:48,551 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (1/1) ... [2025-03-03 13:41:48,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:41:48,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:41:48,575 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 13:41:48,577 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 13:41:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:41:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 13:41:48,593 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 13:41:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:41:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:41:48,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:41:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:41:48,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:41:48,636 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:41:48,638 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:41:48,755 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 13:41:48,755 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:41:48,765 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:41:48,765 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:41:48,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:41:48 BoogieIcfgContainer [2025-03-03 13:41:48,765 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:41:48,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:41:48,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:41:48,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:41:48,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:41:48" (1/3) ... [2025-03-03 13:41:48,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485cc927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:41:48, skipping insertion in model container [2025-03-03 13:41:48,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:41:48" (2/3) ... [2025-03-03 13:41:48,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485cc927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:41:48, skipping insertion in model container [2025-03-03 13:41:48,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:41:48" (3/3) ... [2025-03-03 13:41:48,771 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2025-03-03 13:41:48,781 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:41:48,782 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll.c that has 3 procedures, 29 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 13:41:48,817 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:41:48,824 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;@16b720a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:41:48,824 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:41:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 13:41:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-03 13:41:48,833 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:48,833 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:48,834 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:48,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:48,839 INFO L85 PathProgramCache]: Analyzing trace with hash 469711797, now seen corresponding path program 1 times [2025-03-03 13:41:48,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:48,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599587442] [2025-03-03 13:41:48,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:48,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:48,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-03 13:41:48,906 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:41:48,907 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:48,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 13:41:49,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:49,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599587442] [2025-03-03 13:41:49,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599587442] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:41:49,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:41:49,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-03 13:41:49,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578646368] [2025-03-03 13:41:49,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:41:49,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:41:49,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:49,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:41:49,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:41:49,091 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:41:49,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:41:49,170 INFO L93 Difference]: Finished difference Result 64 states and 108 transitions. [2025-03-03 13:41:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:41:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-03-03 13:41:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:41:49,178 INFO L225 Difference]: With dead ends: 64 [2025-03-03 13:41:49,178 INFO L226 Difference]: Without dead ends: 34 [2025-03-03 13:41:49,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:41:49,185 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:41:49,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 97 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:41:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-03 13:41:49,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2025-03-03 13:41:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:41:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2025-03-03 13:41:49,211 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 18 [2025-03-03 13:41:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:41:49,211 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2025-03-03 13:41:49,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:41:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2025-03-03 13:41:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-03 13:41:49,212 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:49,212 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:49,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 13:41:49,213 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:49,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1712481037, now seen corresponding path program 1 times [2025-03-03 13:41:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:49,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178076197] [2025-03-03 13:41:49,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:49,220 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 13:41:49,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 13:41:49,229 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:49,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:41:49,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188498206] [2025-03-03 13:41:49,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:49,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:49,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:41:49,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:41:49,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:41:49,259 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 13:41:49,269 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 13:41:49,269 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:49,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:49,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:41:49,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:41:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:41:49,342 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:41:49,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:49,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178076197] [2025-03-03 13:41:49,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:41:49,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188498206] [2025-03-03 13:41:49,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188498206] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:41:49,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:41:49,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:41:49,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851631741] [2025-03-03 13:41:49,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:41:49,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:41:49,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:49,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:41:49,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:41:49,344 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:41:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:41:49,379 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-03 13:41:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:41:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-03-03 13:41:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:41:49,380 INFO L225 Difference]: With dead ends: 40 [2025-03-03 13:41:49,380 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 13:41:49,380 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:41:49,381 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:41:49,381 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 102 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:41:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 13:41:49,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2025-03-03 13:41:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 13:41:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2025-03-03 13:41:49,388 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 19 [2025-03-03 13:41:49,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:41:49,388 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2025-03-03 13:41:49,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:41:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2025-03-03 13:41:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-03 13:41:49,389 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:49,389 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:49,395 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 13:41:49,594 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 13:41:49,594 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:49,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1936950180, now seen corresponding path program 1 times [2025-03-03 13:41:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:49,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364626532] [2025-03-03 13:41:49,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:49,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:49,599 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-03 13:41:49,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:41:49,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:49,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 13:41:49,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:49,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364626532] [2025-03-03 13:41:49,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364626532] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:41:49,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098773649] [2025-03-03 13:41:49,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:49,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:49,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:41:49,738 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 13:41:49,740 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 13:41:49,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-03 13:41:49,777 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 13:41:49,777 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:49,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:49,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:41:49,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:41:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 13:41:49,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:41:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 13:41:49,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098773649] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:41:49,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:41:49,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-03-03 13:41:49,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633423227] [2025-03-03 13:41:49,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:41:49,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 13:41:49,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:49,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 13:41:49,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-03 13:41:49,876 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 13:41:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:41:50,003 INFO L93 Difference]: Finished difference Result 79 states and 117 transitions. [2025-03-03 13:41:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:41:50,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2025-03-03 13:41:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:41:50,006 INFO L225 Difference]: With dead ends: 79 [2025-03-03 13:41:50,006 INFO L226 Difference]: Without dead ends: 72 [2025-03-03 13:41:50,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:41:50,006 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:41:50,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 134 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:41:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-03 13:41:50,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 51. [2025-03-03 13:41:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.375) internal successors, (44), 33 states have internal predecessors, (44), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-03 13:41:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2025-03-03 13:41:50,024 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 21 [2025-03-03 13:41:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:41:50,024 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2025-03-03 13:41:50,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 13:41:50,024 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2025-03-03 13:41:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-03 13:41:50,025 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:50,025 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:50,034 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 13:41:50,225 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 13:41:50,225 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:50,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash -47769346, now seen corresponding path program 1 times [2025-03-03 13:41:50,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:50,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194268792] [2025-03-03 13:41:50,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:50,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:50,229 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-03 13:41:50,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 13:41:50,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:50,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:41:50,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39136863] [2025-03-03 13:41:50,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:50,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:41:50,237 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 13:41:50,240 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 13:41:50,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-03 13:41:50,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 13:41:50,274 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:50,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:50,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 13:41:50,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:41:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 13:41:50,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:41:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:41:50,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194268792] [2025-03-03 13:41:50,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:41:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39136863] [2025-03-03 13:41:50,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39136863] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:41:50,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:41:50,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2025-03-03 13:41:50,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42633875] [2025-03-03 13:41:50,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:41:50,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 13:41:50,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:50,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 13:41:50,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:41:50,651 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 15 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:41:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:41:51,257 INFO L93 Difference]: Finished difference Result 97 states and 144 transitions. [2025-03-03 13:41:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:41:51,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 15 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2025-03-03 13:41:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:41:51,259 INFO L225 Difference]: With dead ends: 97 [2025-03-03 13:41:51,259 INFO L226 Difference]: Without dead ends: 95 [2025-03-03 13:41:51,260 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:41:51,260 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 74 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:41:51,260 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 204 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:41:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-03-03 13:41:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2025-03-03 13:41:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 50 states have internal predecessors, (68), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-03 13:41:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 113 transitions. [2025-03-03 13:41:51,300 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 113 transitions. Word has length 22 [2025-03-03 13:41:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:41:51,300 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 113 transitions. [2025-03-03 13:41:51,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 15 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:41:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 113 transitions. [2025-03-03 13:41:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-03 13:41:51,301 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:51,301 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:51,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 13:41:51,501 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 13:41:51,501 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:51,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash 126287656, now seen corresponding path program 1 times [2025-03-03 13:41:51,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:51,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043967307] [2025-03-03 13:41:51,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:51,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:51,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-03 13:41:51,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-03 13:41:51,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:51,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:41:51,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650704670] [2025-03-03 13:41:51,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:51,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:41:51,523 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 13:41:51,524 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 13:41:51,544 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-03 13:41:51,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-03 13:41:51,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:51,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:51,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 13:41:51,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:41:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 13:41:51,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:41:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:41:51,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:51,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043967307] [2025-03-03 13:41:51,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:41:51,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650704670] [2025-03-03 13:41:51,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650704670] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:41:51,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:41:51,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2025-03-03 13:41:51,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150893684] [2025-03-03 13:41:51,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:41:51,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:41:51,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:51,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:41:51,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2025-03-03 13:41:51,855 INFO L87 Difference]: Start difference. First operand 77 states and 113 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-03 13:41:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:41:52,670 INFO L93 Difference]: Finished difference Result 157 states and 241 transitions. [2025-03-03 13:41:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:41:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2025-03-03 13:41:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:41:52,672 INFO L225 Difference]: With dead ends: 157 [2025-03-03 13:41:52,672 INFO L226 Difference]: Without dead ends: 155 [2025-03-03 13:41:52,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 13:41:52,673 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 141 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:41:52,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 179 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:41:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-03-03 13:41:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 122. [2025-03-03 13:41:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 80 states have (on average 1.4125) internal successors, (113), 81 states have internal predecessors, (113), 35 states have call successors, (35), 6 states have call predecessors, (35), 6 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2025-03-03 13:41:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 182 transitions. [2025-03-03 13:41:52,698 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 182 transitions. Word has length 27 [2025-03-03 13:41:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:41:52,698 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 182 transitions. [2025-03-03 13:41:52,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-03 13:41:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 182 transitions. [2025-03-03 13:41:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-03 13:41:52,699 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:52,699 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:52,704 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 13:41:52,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:52,899 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:52,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:52,900 INFO L85 PathProgramCache]: Analyzing trace with hash -50426210, now seen corresponding path program 2 times [2025-03-03 13:41:52,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:52,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628452870] [2025-03-03 13:41:52,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:41:52,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:52,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-03 13:41:52,915 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 13:41:52,915 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:41:52,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-03 13:41:52,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:52,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628452870] [2025-03-03 13:41:52,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628452870] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:41:52,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:41:52,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:41:52,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384408252] [2025-03-03 13:41:52,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:41:52,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:41:52,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:52,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:41:52,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:41:52,959 INFO L87 Difference]: Start difference. First operand 122 states and 182 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:41:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:41:53,025 INFO L93 Difference]: Finished difference Result 175 states and 263 transitions. [2025-03-03 13:41:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:41:53,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2025-03-03 13:41:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:41:53,027 INFO L225 Difference]: With dead ends: 175 [2025-03-03 13:41:53,027 INFO L226 Difference]: Without dead ends: 97 [2025-03-03 13:41:53,027 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:41:53,028 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:41:53,028 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 108 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:41:53,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-03-03 13:41:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2025-03-03 13:41:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 47 states have internal predecessors, (59), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-03 13:41:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 104 transitions. [2025-03-03 13:41:53,043 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 104 transitions. Word has length 28 [2025-03-03 13:41:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:41:53,043 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 104 transitions. [2025-03-03 13:41:53,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:41:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 104 transitions. [2025-03-03 13:41:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 13:41:53,044 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:53,044 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:53,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-03 13:41:53,044 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:53,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:53,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1656048510, now seen corresponding path program 1 times [2025-03-03 13:41:53,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:53,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561395874] [2025-03-03 13:41:53,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:53,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:53,047 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-03 13:41:53,053 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:41:53,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:53,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:41:53,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738453319] [2025-03-03 13:41:53,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:53,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:53,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:41:53,055 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 13:41:53,057 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 13:41:53,075 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-03 13:41:53,085 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:41:53,085 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:53,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:53,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:41:53,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:41:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-03 13:41:53,119 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:41:53,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:53,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561395874] [2025-03-03 13:41:53,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:41:53,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738453319] [2025-03-03 13:41:53,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738453319] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:41:53,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:41:53,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:41:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530342532] [2025-03-03 13:41:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:41:53,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:41:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:53,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:41:53,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:41:53,120 INFO L87 Difference]: Start difference. First operand 76 states and 104 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:41:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:41:53,172 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2025-03-03 13:41:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:41:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2025-03-03 13:41:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:41:53,174 INFO L225 Difference]: With dead ends: 105 [2025-03-03 13:41:53,174 INFO L226 Difference]: Without dead ends: 103 [2025-03-03 13:41:53,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:41:53,175 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:41:53,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 92 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:41:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-03 13:41:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2025-03-03 13:41:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 55 states have (on average 1.290909090909091) internal successors, (71), 56 states have internal predecessors, (71), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2025-03-03 13:41:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 140 transitions. [2025-03-03 13:41:53,200 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 140 transitions. Word has length 32 [2025-03-03 13:41:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:41:53,201 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 140 transitions. [2025-03-03 13:41:53,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:41:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 140 transitions. [2025-03-03 13:41:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-03 13:41:53,202 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:53,202 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:53,208 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 13:41:53,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:53,403 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:53,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1130519751, now seen corresponding path program 1 times [2025-03-03 13:41:53,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:53,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285185324] [2025-03-03 13:41:53,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:53,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:53,407 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-03 13:41:53,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 13:41:53,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:53,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:41:53,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388828524] [2025-03-03 13:41:53,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:53,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:53,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:41:53,415 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 13:41:53,416 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 13:41:53,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-03 13:41:53,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 13:41:53,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:53,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:53,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:41:53,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:41:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 13:41:53,478 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:41:53,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:53,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285185324] [2025-03-03 13:41:53,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:41:53,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388828524] [2025-03-03 13:41:53,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388828524] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:41:53,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:41:53,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:41:53,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825735443] [2025-03-03 13:41:53,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:41:53,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:41:53,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:53,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:41:53,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:41:53,479 INFO L87 Difference]: Start difference. First operand 99 states and 140 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 13:41:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:41:53,538 INFO L93 Difference]: Finished difference Result 149 states and 229 transitions. [2025-03-03 13:41:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:41:53,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2025-03-03 13:41:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:41:53,540 INFO L225 Difference]: With dead ends: 149 [2025-03-03 13:41:53,540 INFO L226 Difference]: Without dead ends: 147 [2025-03-03 13:41:53,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:41:53,540 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:41:53,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:41:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2025-03-03 13:41:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2025-03-03 13:41:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 67 states have internal predecessors, (74), 67 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (66), 58 states have call predecessors, (66), 66 states have call successors, (66) [2025-03-03 13:41:53,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 207 transitions. [2025-03-03 13:41:53,585 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 207 transitions. Word has length 34 [2025-03-03 13:41:53,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:41:53,585 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 207 transitions. [2025-03-03 13:41:53,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 13:41:53,585 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 207 transitions. [2025-03-03 13:41:53,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-03 13:41:53,586 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:53,586 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:53,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 13:41:53,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:53,786 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:53,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash -457918096, now seen corresponding path program 1 times [2025-03-03 13:41:53,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:53,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099100963] [2025-03-03 13:41:53,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:53,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:53,794 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-03 13:41:53,810 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:41:53,810 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:53,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:41:53,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035675145] [2025-03-03 13:41:53,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:53,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:53,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:41:53,815 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 13:41:53,817 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 13:41:53,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-03 13:41:53,858 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:41:53,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:53,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:53,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-03 13:41:53,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:41:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 13:41:54,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:41:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-03 13:41:54,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:54,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099100963] [2025-03-03 13:41:54,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:41:54,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035675145] [2025-03-03 13:41:54,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035675145] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:41:54,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:41:54,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-03-03 13:41:54,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726425068] [2025-03-03 13:41:54,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:41:54,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:41:54,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:54,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:41:54,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:41:54,551 INFO L87 Difference]: Start difference. First operand 135 states and 207 transitions. Second operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 13:41:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:41:56,308 INFO L93 Difference]: Finished difference Result 363 states and 581 transitions. [2025-03-03 13:41:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-03 13:41:56,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 44 [2025-03-03 13:41:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:41:56,311 INFO L225 Difference]: With dead ends: 363 [2025-03-03 13:41:56,311 INFO L226 Difference]: Without dead ends: 277 [2025-03-03 13:41:56,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:41:56,313 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 13:41:56,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 207 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 13:41:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2025-03-03 13:41:56,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 205. [2025-03-03 13:41:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 101 states have (on average 1.306930693069307) internal successors, (132), 108 states have internal predecessors, (132), 91 states have call successors, (91), 12 states have call predecessors, (91), 12 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2025-03-03 13:41:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 313 transitions. [2025-03-03 13:41:56,400 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 313 transitions. Word has length 44 [2025-03-03 13:41:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:41:56,402 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 313 transitions. [2025-03-03 13:41:56,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 13:41:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 313 transitions. [2025-03-03 13:41:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-03 13:41:56,402 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:56,403 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:56,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 13:41:56,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:56,603 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:56,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash 541710179, now seen corresponding path program 1 times [2025-03-03 13:41:56,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:56,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970930830] [2025-03-03 13:41:56,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:56,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:56,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-03 13:41:56,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-03 13:41:56,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:56,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:41:56,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523707773] [2025-03-03 13:41:56,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:41:56,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:56,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:41:56,626 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 13:41:56,627 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 13:41:56,648 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-03 13:41:56,660 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-03 13:41:56,661 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:41:56,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:56,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-03 13:41:56,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:41:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 13:41:56,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:41:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-03 13:41:57,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:57,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970930830] [2025-03-03 13:41:57,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:41:57,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523707773] [2025-03-03 13:41:57,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523707773] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:41:57,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:41:57,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2025-03-03 13:41:57,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213322172] [2025-03-03 13:41:57,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:41:57,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 13:41:57,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:57,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 13:41:57,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:41:57,231 INFO L87 Difference]: Start difference. First operand 205 states and 313 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 22 states have internal predecessors, (40), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 13:41:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:41:58,944 INFO L93 Difference]: Finished difference Result 285 states and 441 transitions. [2025-03-03 13:41:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:41:58,945 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 22 states have internal predecessors, (40), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 48 [2025-03-03 13:41:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:41:58,947 INFO L225 Difference]: With dead ends: 285 [2025-03-03 13:41:58,947 INFO L226 Difference]: Without dead ends: 283 [2025-03-03 13:41:58,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:41:58,948 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 126 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-03 13:41:58,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 478 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-03 13:41:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2025-03-03 13:41:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 238. [2025-03-03 13:41:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 116 states have (on average 1.3017241379310345) internal successors, (151), 125 states have internal predecessors, (151), 107 states have call successors, (107), 14 states have call predecessors, (107), 14 states have return successors, (106), 98 states have call predecessors, (106), 106 states have call successors, (106) [2025-03-03 13:41:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 364 transitions. [2025-03-03 13:41:59,039 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 364 transitions. Word has length 48 [2025-03-03 13:41:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:41:59,039 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 364 transitions. [2025-03-03 13:41:59,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 22 states have internal predecessors, (40), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 13:41:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 364 transitions. [2025-03-03 13:41:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 13:41:59,040 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:41:59,040 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:41:59,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 13:41:59,240 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,SelfDestructingSolverStorable9 [2025-03-03 13:41:59,240 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:41:59,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:41:59,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1858369507, now seen corresponding path program 2 times [2025-03-03 13:41:59,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:41:59,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684227821] [2025-03-03 13:41:59,241 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:41:59,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:41:59,244 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-03 13:41:59,254 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:41:59,254 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:41:59,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:41:59,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580719045] [2025-03-03 13:41:59,255 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:41:59,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:41:59,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:41:59,257 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 13:41:59,258 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 13:41:59,280 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-03 13:41:59,296 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 13:41:59,297 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:41:59,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:41:59,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-03-03 13:41:59,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:41:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-03-03 13:41:59,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:41:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-03 13:41:59,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:41:59,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684227821] [2025-03-03 13:41:59,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:41:59,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580719045] [2025-03-03 13:41:59,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580719045] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:41:59,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:41:59,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2025-03-03 13:41:59,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978440497] [2025-03-03 13:41:59,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:41:59,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 13:41:59,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:41:59,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 13:41:59,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:41:59,956 INFO L87 Difference]: Start difference. First operand 238 states and 364 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 24 states have internal predecessors, (40), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-03 13:42:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:42:02,822 INFO L93 Difference]: Finished difference Result 461 states and 728 transitions. [2025-03-03 13:42:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-03 13:42:02,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 24 states have internal predecessors, (40), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 53 [2025-03-03 13:42:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:42:02,825 INFO L225 Difference]: With dead ends: 461 [2025-03-03 13:42:02,825 INFO L226 Difference]: Without dead ends: 377 [2025-03-03 13:42:02,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2025-03-03 13:42:02,827 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 164 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:42:02,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 401 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-03 13:42:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2025-03-03 13:42:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 331. [2025-03-03 13:42:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 154 states have (on average 1.3311688311688312) internal successors, (205), 167 states have internal predecessors, (205), 159 states have call successors, (159), 17 states have call predecessors, (159), 17 states have return successors, (158), 146 states have call predecessors, (158), 158 states have call successors, (158) [2025-03-03 13:42:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 522 transitions. [2025-03-03 13:42:02,983 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 522 transitions. Word has length 53 [2025-03-03 13:42:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:42:02,984 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 522 transitions. [2025-03-03 13:42:02,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 24 states have internal predecessors, (40), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-03 13:42:02,984 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 522 transitions. [2025-03-03 13:42:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-03 13:42:02,985 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:42:02,985 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:42:02,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 13:42:03,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:42:03,189 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:42:03,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:42:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash 867817824, now seen corresponding path program 1 times [2025-03-03 13:42:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:42:03,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581546446] [2025-03-03 13:42:03,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:42:03,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:42:03,192 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-03-03 13:42:03,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-03-03 13:42:03,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:42:03,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:42:03,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896455677] [2025-03-03 13:42:03,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:42:03,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:42:03,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:42:03,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:42:03,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:42:03,226 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-03-03 13:42:03,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-03-03 13:42:03,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:42:03,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:42:03,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-03-03 13:42:03,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:42:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-03 13:42:03,762 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:42:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-03-03 13:42:04,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:42:04,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581546446] [2025-03-03 13:42:04,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:42:04,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896455677] [2025-03-03 13:42:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896455677] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:42:04,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:42:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2025-03-03 13:42:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696577404] [2025-03-03 13:42:04,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:42:04,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-03 13:42:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:42:04,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-03 13:42:04,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:42:04,402 INFO L87 Difference]: Start difference. First operand 331 states and 522 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 31 states have internal predecessors, (45), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-03 13:42:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:42:09,946 INFO L93 Difference]: Finished difference Result 496 states and 798 transitions. [2025-03-03 13:42:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2025-03-03 13:42:09,947 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 31 states have internal predecessors, (45), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 68 [2025-03-03 13:42:09,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:42:09,949 INFO L225 Difference]: With dead ends: 496 [2025-03-03 13:42:09,949 INFO L226 Difference]: Without dead ends: 488 [2025-03-03 13:42:09,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1200, Invalid=4962, Unknown=0, NotChecked=0, Total=6162 [2025-03-03 13:42:09,951 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 195 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:42:09,951 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 575 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2025-03-03 13:42:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2025-03-03 13:42:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 450. [2025-03-03 13:42:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 206 states have (on average 1.3592233009708738) internal successors, (280), 223 states have internal predecessors, (280), 223 states have call successors, (223), 20 states have call predecessors, (223), 20 states have return successors, (222), 206 states have call predecessors, (222), 222 states have call successors, (222) [2025-03-03 13:42:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 725 transitions. [2025-03-03 13:42:10,267 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 725 transitions. Word has length 68 [2025-03-03 13:42:10,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:42:10,267 INFO L471 AbstractCegarLoop]: Abstraction has 450 states and 725 transitions. [2025-03-03 13:42:10,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 31 states have internal predecessors, (45), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-03 13:42:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 725 transitions. [2025-03-03 13:42:10,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-03 13:42:10,268 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:42:10,268 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:42:10,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 13:42:10,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 13:42:10,474 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:42:10,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:42:10,474 INFO L85 PathProgramCache]: Analyzing trace with hash 461464087, now seen corresponding path program 3 times [2025-03-03 13:42:10,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:42:10,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532652800] [2025-03-03 13:42:10,474 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:42:10,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:42:10,478 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 71 statements into 7 equivalence classes. [2025-03-03 13:42:10,508 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 71 of 71 statements. [2025-03-03 13:42:10,508 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 13:42:10,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:42:10,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273597282] [2025-03-03 13:42:10,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:42:10,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:42:10,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:42:10,512 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:42:10,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:42:10,537 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 71 statements into 7 equivalence classes. [2025-03-03 13:42:10,554 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 56 of 71 statements. [2025-03-03 13:42:10,554 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 13:42:10,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:42:10,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-03 13:42:10,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:42:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-03 13:42:10,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:42:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-03 13:42:11,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:42:11,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532652800] [2025-03-03 13:42:11,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:42:11,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273597282] [2025-03-03 13:42:11,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273597282] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:42:11,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:42:11,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2025-03-03 13:42:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519056788] [2025-03-03 13:42:11,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:42:11,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 13:42:11,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:42:11,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 13:42:11,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:42:11,432 INFO L87 Difference]: Start difference. First operand 450 states and 725 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2025-03-03 13:42:33,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:42:33,794 INFO L93 Difference]: Finished difference Result 738 states and 1227 transitions. [2025-03-03 13:42:33,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-03-03 13:42:33,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 71 [2025-03-03 13:42:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:42:33,798 INFO L225 Difference]: With dead ends: 738 [2025-03-03 13:42:33,798 INFO L226 Difference]: Without dead ends: 736 [2025-03-03 13:42:33,799 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1022, Invalid=4234, Unknown=0, NotChecked=0, Total=5256 [2025-03-03 13:42:33,799 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 213 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:42:33,799 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 512 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2025-03-03 13:42:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2025-03-03 13:42:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 592. [2025-03-03 13:42:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 266 states have (on average 1.387218045112782) internal successors, (369), 288 states have internal predecessors, (369), 303 states have call successors, (303), 22 states have call predecessors, (303), 22 states have return successors, (302), 281 states have call predecessors, (302), 302 states have call successors, (302) [2025-03-03 13:42:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 974 transitions. [2025-03-03 13:42:34,280 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 974 transitions. Word has length 71 [2025-03-03 13:42:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:42:34,280 INFO L471 AbstractCegarLoop]: Abstraction has 592 states and 974 transitions. [2025-03-03 13:42:34,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2025-03-03 13:42:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 974 transitions. [2025-03-03 13:42:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-03-03 13:42:34,281 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:42:34,282 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:42:34,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 13:42:34,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 13:42:34,482 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:42:34,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:42:34,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1594470874, now seen corresponding path program 2 times [2025-03-03 13:42:34,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:42:34,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909201587] [2025-03-03 13:42:34,482 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:42:34,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:42:34,485 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 73 statements into 2 equivalence classes. [2025-03-03 13:42:34,491 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 73 of 73 statements. [2025-03-03 13:42:34,491 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:42:34,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:42:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2025-03-03 13:42:34,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:42:34,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909201587] [2025-03-03 13:42:34,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909201587] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:42:34,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810362549] [2025-03-03 13:42:34,622 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:42:34,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:42:34,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:42:34,626 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:42:34,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:42:34,653 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 73 statements into 2 equivalence classes. [2025-03-03 13:42:34,669 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 73 of 73 statements. [2025-03-03 13:42:34,670 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:42:34,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:42:34,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 13:42:34,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:42:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2025-03-03 13:42:34,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:42:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2025-03-03 13:42:34,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810362549] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:42:34,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:42:34,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2025-03-03 13:42:34,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270437996] [2025-03-03 13:42:34,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:42:34,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 13:42:34,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:42:34,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 13:42:34,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:42:34,786 INFO L87 Difference]: Start difference. First operand 592 states and 974 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-03-03 13:42:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:42:35,467 INFO L93 Difference]: Finished difference Result 1000 states and 1636 transitions. [2025-03-03 13:42:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 13:42:35,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2025-03-03 13:42:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:42:35,472 INFO L225 Difference]: With dead ends: 1000 [2025-03-03 13:42:35,472 INFO L226 Difference]: Without dead ends: 581 [2025-03-03 13:42:35,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:42:35,477 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 65 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:42:35,478 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 281 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:42:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2025-03-03 13:42:35,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 429. [2025-03-03 13:42:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 213 states have (on average 1.3380281690140845) internal successors, (285), 214 states have internal predecessors, (285), 195 states have call successors, (195), 20 states have call predecessors, (195), 20 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2025-03-03 13:42:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 674 transitions. [2025-03-03 13:42:35,799 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 674 transitions. Word has length 73 [2025-03-03 13:42:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:42:35,799 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 674 transitions. [2025-03-03 13:42:35,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-03-03 13:42:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 674 transitions. [2025-03-03 13:42:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-03-03 13:42:35,800 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:42:35,800 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:42:35,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 13:42:36,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 13:42:36,004 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:42:36,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:42:36,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2093111075, now seen corresponding path program 1 times [2025-03-03 13:42:36,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:42:36,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944203225] [2025-03-03 13:42:36,004 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:42:36,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:42:36,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-03-03 13:42:36,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-03-03 13:42:36,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:42:36,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:42:36,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125325913] [2025-03-03 13:42:36,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:42:36,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:42:36,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:42:36,024 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:42:36,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:42:36,046 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-03-03 13:42:36,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-03-03 13:42:36,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:42:36,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:42:36,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:42:36,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:42:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2025-03-03 13:42:36,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:42:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2025-03-03 13:42:36,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:42:36,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944203225] [2025-03-03 13:42:36,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:42:36,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125325913] [2025-03-03 13:42:36,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125325913] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 13:42:36,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:42:36,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2025-03-03 13:42:36,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385173531] [2025-03-03 13:42:36,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:42:36,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:42:36,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:42:36,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:42:36,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:42:36,206 INFO L87 Difference]: Start difference. First operand 429 states and 674 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-03-03 13:42:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:42:36,528 INFO L93 Difference]: Finished difference Result 443 states and 685 transitions. [2025-03-03 13:42:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:42:36,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 81 [2025-03-03 13:42:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:42:36,530 INFO L225 Difference]: With dead ends: 443 [2025-03-03 13:42:36,530 INFO L226 Difference]: Without dead ends: 441 [2025-03-03 13:42:36,531 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:42:36,531 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:42:36,531 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:42:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2025-03-03 13:42:36,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2025-03-03 13:42:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 222 states have (on average 1.3243243243243243) internal successors, (294), 223 states have internal predecessors, (294), 195 states have call successors, (195), 23 states have call predecessors, (195), 23 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2025-03-03 13:42:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 683 transitions. [2025-03-03 13:42:36,870 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 683 transitions. Word has length 81 [2025-03-03 13:42:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:42:36,870 INFO L471 AbstractCegarLoop]: Abstraction has 441 states and 683 transitions. [2025-03-03 13:42:36,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-03-03 13:42:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 683 transitions. [2025-03-03 13:42:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-03-03 13:42:36,871 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:42:36,871 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:42:36,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 13:42:37,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 13:42:37,072 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:42:37,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:42:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1179406213, now seen corresponding path program 2 times [2025-03-03 13:42:37,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:42:37,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397780603] [2025-03-03 13:42:37,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:42:37,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:42:37,075 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 88 statements into 2 equivalence classes. [2025-03-03 13:42:37,082 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 88 of 88 statements. [2025-03-03 13:42:37,083 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:42:37,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:42:37,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976725155] [2025-03-03 13:42:37,083 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:42:37,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:42:37,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:42:37,088 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:42:37,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:42:37,111 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 88 statements into 2 equivalence classes. [2025-03-03 13:42:37,129 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 88 of 88 statements. [2025-03-03 13:42:37,129 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:42:37,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:42:37,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-03 13:42:37,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:42:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2025-03-03 13:42:37,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:42:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2025-03-03 13:42:38,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:42:38,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397780603] [2025-03-03 13:42:38,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:42:38,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976725155] [2025-03-03 13:42:38,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976725155] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:42:38,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:42:38,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2025-03-03 13:42:38,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568070384] [2025-03-03 13:42:38,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:42:38,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 13:42:38,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:42:38,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 13:42:38,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2025-03-03 13:42:38,051 INFO L87 Difference]: Start difference. First operand 441 states and 683 transitions. Second operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2025-03-03 13:42:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:42:45,295 INFO L93 Difference]: Finished difference Result 776 states and 1200 transitions. [2025-03-03 13:42:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-03-03 13:42:45,296 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 88 [2025-03-03 13:42:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:42:45,299 INFO L225 Difference]: With dead ends: 776 [2025-03-03 13:42:45,299 INFO L226 Difference]: Without dead ends: 623 [2025-03-03 13:42:45,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1157, Invalid=5005, Unknown=0, NotChecked=0, Total=6162 [2025-03-03 13:42:45,300 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 183 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:42:45,301 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 331 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-03 13:42:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2025-03-03 13:42:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 538. [2025-03-03 13:42:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 263 states have (on average 1.3346007604562737) internal successors, (351), 264 states have internal predecessors, (351), 247 states have call successors, (247), 27 states have call predecessors, (247), 27 states have return successors, (246), 246 states have call predecessors, (246), 246 states have call successors, (246) [2025-03-03 13:42:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 844 transitions. [2025-03-03 13:42:45,711 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 844 transitions. Word has length 88 [2025-03-03 13:42:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:42:45,711 INFO L471 AbstractCegarLoop]: Abstraction has 538 states and 844 transitions. [2025-03-03 13:42:45,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2025-03-03 13:42:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 844 transitions. [2025-03-03 13:42:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-03 13:42:45,712 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:42:45,712 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:42:45,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 13:42:45,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:42:45,913 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:42:45,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:42:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1935595965, now seen corresponding path program 2 times [2025-03-03 13:42:45,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:42:45,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357925858] [2025-03-03 13:42:45,913 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:42:45,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:42:45,916 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 95 statements into 2 equivalence classes. [2025-03-03 13:42:45,925 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-03 13:42:45,926 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:42:45,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:42:45,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864421877] [2025-03-03 13:42:45,927 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:42:45,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:42:45,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:42:45,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:42:45,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:42:45,952 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 95 statements into 2 equivalence classes. [2025-03-03 13:42:45,974 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-03 13:42:45,974 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:42:45,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:42:45,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-03-03 13:42:45,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:42:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 50 proven. 50 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-03 13:42:46,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:42:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 73 proven. 8 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2025-03-03 13:42:46,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:42:46,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357925858] [2025-03-03 13:42:46,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:42:46,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864421877] [2025-03-03 13:42:46,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864421877] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:42:46,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:42:46,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 22 [2025-03-03 13:42:46,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097648313] [2025-03-03 13:42:46,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:42:46,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:42:46,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:42:46,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:42:46,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:42:46,579 INFO L87 Difference]: Start difference. First operand 538 states and 844 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2025-03-03 13:42:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:42:48,753 INFO L93 Difference]: Finished difference Result 641 states and 995 transitions. [2025-03-03 13:42:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 13:42:48,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 95 [2025-03-03 13:42:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:42:48,757 INFO L225 Difference]: With dead ends: 641 [2025-03-03 13:42:48,757 INFO L226 Difference]: Without dead ends: 639 [2025-03-03 13:42:48,757 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 13:42:48,757 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 86 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:42:48,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 296 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-03 13:42:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2025-03-03 13:42:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 558. [2025-03-03 13:42:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 278 states have (on average 1.316546762589928) internal successors, (366), 279 states have internal predecessors, (366), 247 states have call successors, (247), 32 states have call predecessors, (247), 32 states have return successors, (246), 246 states have call predecessors, (246), 246 states have call successors, (246) [2025-03-03 13:42:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 859 transitions. [2025-03-03 13:42:49,169 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 859 transitions. Word has length 95 [2025-03-03 13:42:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:42:49,170 INFO L471 AbstractCegarLoop]: Abstraction has 558 states and 859 transitions. [2025-03-03 13:42:49,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2025-03-03 13:42:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 859 transitions. [2025-03-03 13:42:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-03 13:42:49,171 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:42:49,171 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:42:49,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 13:42:49,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 13:42:49,372 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:42:49,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:42:49,372 INFO L85 PathProgramCache]: Analyzing trace with hash 445376920, now seen corresponding path program 3 times [2025-03-03 13:42:49,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:42:49,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379200776] [2025-03-03 13:42:49,372 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:42:49,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:42:49,375 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 11 equivalence classes. [2025-03-03 13:42:49,404 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 13:42:49,404 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 13:42:49,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:42:49,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801629072] [2025-03-03 13:42:49,405 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:42:49,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:42:49,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:42:49,408 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:42:49,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:42:49,435 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 11 equivalence classes. [2025-03-03 13:42:49,620 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 56 of 97 statements. [2025-03-03 13:42:49,620 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 13:42:49,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:42:49,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 68 conjuncts are in the unsatisfiable core [2025-03-03 13:42:49,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:42:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 160 proven. 20 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2025-03-03 13:42:51,400 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:42:53,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:42:53,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379200776] [2025-03-03 13:42:53,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:42:53,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801629072] [2025-03-03 13:42:53,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801629072] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:42:53,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:42:53,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-03 13:42:53,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489279364] [2025-03-03 13:42:53,086 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:42:53,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:42:53,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:42:53,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:42:53,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:42:53,087 INFO L87 Difference]: Start difference. First operand 558 states and 859 transitions. Second operand has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-03 13:43:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:43:19,045 INFO L93 Difference]: Finished difference Result 879 states and 1357 transitions. [2025-03-03 13:43:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-03 13:43:19,046 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 97 [2025-03-03 13:43:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:43:19,050 INFO L225 Difference]: With dead ends: 879 [2025-03-03 13:43:19,050 INFO L226 Difference]: Without dead ends: 877 [2025-03-03 13:43:19,051 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=683, Invalid=2976, Unknown=1, NotChecked=0, Total=3660 [2025-03-03 13:43:19,051 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2025-03-03 13:43:19,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 338 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2025-03-03 13:43:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2025-03-03 13:43:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 860. [2025-03-03 13:43:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 415 states have (on average 1.3180722891566266) internal successors, (547), 433 states have internal predecessors, (547), 396 states have call successors, (396), 48 states have call predecessors, (396), 48 states have return successors, (395), 378 states have call predecessors, (395), 395 states have call successors, (395) [2025-03-03 13:43:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1338 transitions. [2025-03-03 13:43:19,776 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1338 transitions. Word has length 97 [2025-03-03 13:43:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:43:19,776 INFO L471 AbstractCegarLoop]: Abstraction has 860 states and 1338 transitions. [2025-03-03 13:43:19,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-03 13:43:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1338 transitions. [2025-03-03 13:43:19,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-03-03 13:43:19,777 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:43:19,777 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:43:19,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 13:43:19,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 13:43:19,978 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:43:19,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:43:19,978 INFO L85 PathProgramCache]: Analyzing trace with hash 476486973, now seen corresponding path program 4 times [2025-03-03 13:43:19,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:43:19,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321990178] [2025-03-03 13:43:19,978 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:43:19,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:43:19,982 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 99 statements into 2 equivalence classes. [2025-03-03 13:43:19,993 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 99 of 99 statements. [2025-03-03 13:43:19,993 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:43:19,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:43:19,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926603998] [2025-03-03 13:43:19,994 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:43:19,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:43:19,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:43:19,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:43:19,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 13:43:20,024 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 99 statements into 2 equivalence classes. [2025-03-03 13:43:20,041 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 97 of 99 statements. [2025-03-03 13:43:20,041 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 13:43:20,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:43:20,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-03 13:43:20,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:43:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2025-03-03 13:43:20,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:43:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 47 proven. 11 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2025-03-03 13:43:20,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:43:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321990178] [2025-03-03 13:43:20,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:43:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926603998] [2025-03-03 13:43:20,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926603998] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:43:20,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:43:20,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2025-03-03 13:43:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274553502] [2025-03-03 13:43:20,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:43:20,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:43:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:43:20,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:43:20,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:43:20,520 INFO L87 Difference]: Start difference. First operand 860 states and 1338 transitions. Second operand has 22 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2025-03-03 13:43:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:43:23,144 INFO L93 Difference]: Finished difference Result 2302 states and 3829 transitions. [2025-03-03 13:43:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 13:43:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 99 [2025-03-03 13:43:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:43:23,152 INFO L225 Difference]: With dead ends: 2302 [2025-03-03 13:43:23,152 INFO L226 Difference]: Without dead ends: 1823 [2025-03-03 13:43:23,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2025-03-03 13:43:23,154 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 107 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:43:23,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 338 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:43:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2025-03-03 13:43:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1485. [2025-03-03 13:43:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 603 states have (on average 1.429519071310116) internal successors, (862), 636 states have internal predecessors, (862), 824 states have call successors, (824), 57 states have call predecessors, (824), 57 states have return successors, (823), 791 states have call predecessors, (823), 823 states have call successors, (823) [2025-03-03 13:43:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2509 transitions. [2025-03-03 13:43:24,785 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2509 transitions. Word has length 99 [2025-03-03 13:43:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:43:24,786 INFO L471 AbstractCegarLoop]: Abstraction has 1485 states and 2509 transitions. [2025-03-03 13:43:24,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2025-03-03 13:43:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2509 transitions. [2025-03-03 13:43:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-03-03 13:43:24,787 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:43:24,787 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:43:24,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 13:43:24,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:43:24,992 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:43:24,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:43:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1005265463, now seen corresponding path program 5 times [2025-03-03 13:43:24,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:43:24,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882128880] [2025-03-03 13:43:24,992 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:43:24,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:43:24,999 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 100 statements into 8 equivalence classes. [2025-03-03 13:43:25,010 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 100 of 100 statements. [2025-03-03 13:43:25,010 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-03 13:43:25,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:43:25,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262177331] [2025-03-03 13:43:25,011 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:43:25,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:43:25,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:43:25,017 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:43:25,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 13:43:25,043 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 100 statements into 8 equivalence classes. [2025-03-03 13:43:25,078 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 100 of 100 statements. [2025-03-03 13:43:25,078 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-03 13:43:25,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:43:25,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 104 conjuncts are in the unsatisfiable core [2025-03-03 13:43:25,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:43:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 71 proven. 91 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2025-03-03 13:43:26,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:43:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 65 proven. 73 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2025-03-03 13:43:27,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:43:27,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882128880] [2025-03-03 13:43:27,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:43:27,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262177331] [2025-03-03 13:43:27,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262177331] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:43:27,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:43:27,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2025-03-03 13:43:27,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448768534] [2025-03-03 13:43:27,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:43:27,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-03 13:43:27,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:43:27,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-03 13:43:27,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1011, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:43:27,544 INFO L87 Difference]: Start difference. First operand 1485 states and 2509 transitions. Second operand has 36 states, 32 states have (on average 1.75) internal successors, (56), 33 states have internal predecessors, (56), 13 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 11 states have call predecessors, (28), 11 states have call successors, (28)