./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/prodbin-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/prodbin-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 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:43:20,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:43:20,501 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:43:20,504 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:43:20,505 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:43:20,526 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:43:20,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:43:20,527 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:43:20,527 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:43:20,527 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:43:20,527 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:43:20,527 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:43:20,528 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:43:20,528 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:43:20,528 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:43:20,528 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:43:20,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:43:20,529 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:43:20,529 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 -> 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 [2025-03-03 13:43:20,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:43:20,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:43:20,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:43:20,759 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:43:20,759 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:43:20,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/prodbin-ll.c [2025-03-03 13:43:21,907 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca43c4e79/94a49109b60c45548cbe712235e1b355/FLAG2bd7dc4eb [2025-03-03 13:43:22,143 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:43:22,143 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/prodbin-ll.c [2025-03-03 13:43:22,150 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca43c4e79/94a49109b60c45548cbe712235e1b355/FLAG2bd7dc4eb [2025-03-03 13:43:22,469 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca43c4e79/94a49109b60c45548cbe712235e1b355 [2025-03-03 13:43:22,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:43:22,472 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:43:22,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:43:22,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:43:22,476 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:43:22,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,477 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44ce9961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22, skipping insertion in model container [2025-03-03 13:43:22,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,488 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:43:22,587 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/prodbin-ll.c[537,550] [2025-03-03 13:43:22,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:43:22,607 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:43:22,614 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/prodbin-ll.c[537,550] [2025-03-03 13:43:22,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:43:22,629 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:43:22,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22 WrapperNode [2025-03-03 13:43:22,630 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:43:22,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:43:22,632 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:43:22,632 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:43:22,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,652 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2025-03-03 13:43:22,653 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:43:22,654 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:43:22,655 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:43:22,655 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:43:22,659 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,660 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,669 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 13:43:22,672 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,672 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,674 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,676 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:43:22,677 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:43:22,677 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:43:22,677 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:43:22,681 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (1/1) ... [2025-03-03 13:43:22,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:43:22,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:43:22,705 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 13:43:22,710 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 13:43:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:43:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:43:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:43:22,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:43:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:43:22,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:43:22,758 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:43:22,760 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:43:22,867 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-03 13:43:22,867 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:43:22,875 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:43:22,875 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:43:22,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:43:22 BoogieIcfgContainer [2025-03-03 13:43:22,875 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:43:22,877 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:43:22,877 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:43:22,880 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:43:22,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:43:22" (1/3) ... [2025-03-03 13:43:22,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9af2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:43:22, skipping insertion in model container [2025-03-03 13:43:22,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:43:22" (2/3) ... [2025-03-03 13:43:22,883 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9af2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:43:22, skipping insertion in model container [2025-03-03 13:43:22,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:43:22" (3/3) ... [2025-03-03 13:43:22,884 INFO L128 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2025-03-03 13:43:22,895 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:43:22,897 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG prodbin-ll.c that has 2 procedures, 19 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-03 13:43:22,939 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:43:22,948 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;@60ba65e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:43:22,949 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:43:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 13:43:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 13:43:22,957 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:43:22,957 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:43:22,958 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:43:22,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:43:22,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1540479462, now seen corresponding path program 1 times [2025-03-03 13:43:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:43:22,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433347706] [2025-03-03 13:43:22,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:43:22,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:43:23,022 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 13:43:23,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 13:43:23,034 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:43:23,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:43:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:43:23,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:43:23,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433347706] [2025-03-03 13:43:23,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433347706] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:43:23,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:43:23,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-03 13:43:23,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123891127] [2025-03-03 13:43:23,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:43:23,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 13:43:23,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:43:23,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 13:43:23,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:43:23,096 INFO L87 Difference]: Start difference. First operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:43:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:43:23,106 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-03-03 13:43:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 13:43:23,109 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-03 13:43:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:43:23,112 INFO L225 Difference]: With dead ends: 35 [2025-03-03 13:43:23,113 INFO L226 Difference]: Without dead ends: 15 [2025-03-03 13:43:23,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:43:23,118 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:43:23,118 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:43:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-03 13:43:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-03-03 13:43:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 13:43:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2025-03-03 13:43:23,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2025-03-03 13:43:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:43:23,145 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2025-03-03 13:43:23,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:43:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2025-03-03 13:43:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 13:43:23,146 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:43:23,146 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:43:23,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 13:43:23,147 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:43:23,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:43:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850311, now seen corresponding path program 1 times [2025-03-03 13:43:23,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:43:23,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240753501] [2025-03-03 13:43:23,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:43:23,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:43:23,154 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 13:43:23,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 13:43:23,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:43:23,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:43:23,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173307531] [2025-03-03 13:43:23,173 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:43:23,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:43:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:43:23,176 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 13:43:23,177 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 13:43:23,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 13:43:23,230 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 13:43:23,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:43:23,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:43:23,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:43:23,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:43:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:43:23,388 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:43:23,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:43:23,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240753501] [2025-03-03 13:43:23,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:43:23,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173307531] [2025-03-03 13:43:23,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173307531] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:43:23,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:43:23,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-03 13:43:23,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569014821] [2025-03-03 13:43:23,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:43:23,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:43:23,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:43:23,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:43:23,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:43:23,390 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:43:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:43:23,469 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2025-03-03 13:43:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:43:23,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-03 13:43:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:43:23,470 INFO L225 Difference]: With dead ends: 30 [2025-03-03 13:43:23,471 INFO L226 Difference]: Without dead ends: 23 [2025-03-03 13:43:23,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:43:23,472 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:43:23,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 45 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:43:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-03 13:43:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2025-03-03 13:43:23,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 13:43:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2025-03-03 13:43:23,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2025-03-03 13:43:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:43:23,478 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2025-03-03 13:43:23,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:43:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2025-03-03 13:43:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-03 13:43:23,479 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:43:23,479 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:43:23,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 13:43:23,681 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 13:43:23,681 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:43:23,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:43:23,681 INFO L85 PathProgramCache]: Analyzing trace with hash 833688356, now seen corresponding path program 1 times [2025-03-03 13:43:23,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:43:23,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635757571] [2025-03-03 13:43:23,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:43:23,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:43:23,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 13:43:23,701 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 13:43:23,701 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:43:23,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:43:23,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967689215] [2025-03-03 13:43:23,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:43:23,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:43:23,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:43:23,705 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 13:43:23,705 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 13:43:23,725 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 13:43:23,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 13:43:23,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:43:23,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:43:23,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:43:23,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:43:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:43:24,028 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:43:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:43:24,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:43:24,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635757571] [2025-03-03 13:43:24,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:43:24,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967689215] [2025-03-03 13:43:24,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967689215] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:43:24,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:43:24,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2025-03-03 13:43:24,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701143738] [2025-03-03 13:43:24,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:43:24,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 13:43:24,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:43:24,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 13:43:24,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:43:24,343 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:43:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:43:24,574 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2025-03-03 13:43:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 13:43:24,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2025-03-03 13:43:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:43:24,576 INFO L225 Difference]: With dead ends: 40 [2025-03-03 13:43:24,576 INFO L226 Difference]: Without dead ends: 33 [2025-03-03 13:43:24,576 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:43:24,578 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:43:24,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:43:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-03 13:43:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2025-03-03 13:43:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 13:43:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2025-03-03 13:43:24,583 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 16 [2025-03-03 13:43:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:43:24,583 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2025-03-03 13:43:24,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:43:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2025-03-03 13:43:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-03 13:43:24,584 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:43:24,584 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:43:24,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 13:43:24,784 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 13:43:24,785 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:43:24,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:43:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash 862317507, now seen corresponding path program 1 times [2025-03-03 13:43:24,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:43:24,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402803891] [2025-03-03 13:43:24,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:43:24,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:43:24,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 13:43:24,807 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 13:43:24,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:43:24,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:43:24,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150294256] [2025-03-03 13:43:24,808 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:43:24,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:43:24,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:43:24,812 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 13:43:24,813 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 13:43:24,831 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 13:43:24,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 13:43:24,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:43:24,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:43:24,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:43:24,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:43:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:43:25,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:43:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:43:25,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:43:25,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402803891] [2025-03-03 13:43:25,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:43:25,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150294256] [2025-03-03 13:43:25,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150294256] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:43:25,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:43:25,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2025-03-03 13:43:25,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476296144] [2025-03-03 13:43:25,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:43:25,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 13:43:25,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:43:25,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 13:43:25,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:43:25,411 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 18 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 13:43:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:43:25,708 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2025-03-03 13:43:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 13:43:25,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2025-03-03 13:43:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:43:25,710 INFO L225 Difference]: With dead ends: 58 [2025-03-03 13:43:25,710 INFO L226 Difference]: Without dead ends: 51 [2025-03-03 13:43:25,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2025-03-03 13:43:25,711 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:43:25,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:43:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-03 13:43:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-03-03 13:43:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 39 states have internal predecessors, (46), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 13:43:25,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2025-03-03 13:43:25,717 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 16 [2025-03-03 13:43:25,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:43:25,717 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2025-03-03 13:43:25,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 13:43:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2025-03-03 13:43:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-03 13:43:25,717 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:43:25,717 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:43:25,723 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 13:43:25,922 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 13:43:25,922 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:43:25,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:43:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1476177009, now seen corresponding path program 1 times [2025-03-03 13:43:25,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:43:25,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813171095] [2025-03-03 13:43:25,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:43:25,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:43:25,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-03 13:43:25,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 13:43:25,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:43:25,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:43:25,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339245370] [2025-03-03 13:43:25,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:43:25,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:43:25,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:43:25,954 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 13:43:25,958 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 13:43:25,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-03 13:43:25,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 13:43:25,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:43:25,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:43:25,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 13:43:25,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:43:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:43:26,034 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:43:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:43:26,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:43:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813171095] [2025-03-03 13:43:26,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:43:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339245370] [2025-03-03 13:43:26,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339245370] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:43:26,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:43:26,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2025-03-03 13:43:26,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317992186] [2025-03-03 13:43:26,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:43:26,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 13:43:26,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:43:26,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 13:43:26,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:43:26,094 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 13:43:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:43:26,137 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2025-03-03 13:43:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 13:43:26,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2025-03-03 13:43:26,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:43:26,138 INFO L225 Difference]: With dead ends: 57 [2025-03-03 13:43:26,138 INFO L226 Difference]: Without dead ends: 35 [2025-03-03 13:43:26,138 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-03 13:43:26,139 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:43:26,139 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:43:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-03 13:43:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-03-03 13:43:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 13:43:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2025-03-03 13:43:26,147 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 22 [2025-03-03 13:43:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:43:26,148 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2025-03-03 13:43:26,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 13:43:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2025-03-03 13:43:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-03 13:43:26,149 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:43:26,149 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-03-03 13:43:26,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:43:26,349 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 13:43:26,349 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:43:26,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:43:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2142418657, now seen corresponding path program 2 times [2025-03-03 13:43:26,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:43:26,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94610745] [2025-03-03 13:43:26,350 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:43:26,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:43:26,356 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-03 13:43:26,392 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-03 13:43:26,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:43:26,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:43:26,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514669524] [2025-03-03 13:43:26,397 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:43:26,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:43:26,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:43:26,399 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 13:43:26,400 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 13:43:26,419 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-03 13:43:26,433 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-03 13:43:26,433 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:43:26,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:43:26,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-03 13:43:26,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:43:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:43:27,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:43:30,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:43:30,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94610745] [2025-03-03 13:43:30,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:43:30,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514669524] [2025-03-03 13:43:30,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514669524] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:43:30,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:43:30,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-03-03 13:43:30,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482331774] [2025-03-03 13:43:30,671 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:43:30,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 13:43:30,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:43:30,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 13:43:30,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:43:30,674 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 13:43:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:43:32,091 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2025-03-03 13:43:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:43:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2025-03-03 13:43:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:43:32,092 INFO L225 Difference]: With dead ends: 48 [2025-03-03 13:43:32,092 INFO L226 Difference]: Without dead ends: 46 [2025-03-03 13:43:32,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2025-03-03 13:43:32,093 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:43:32,093 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 69 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-03 13:43:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-03 13:43:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2025-03-03 13:43:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:43:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2025-03-03 13:43:32,099 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2025-03-03 13:43:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:43:32,099 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2025-03-03 13:43:32,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 13:43:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2025-03-03 13:43:32,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-03 13:43:32,100 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:43:32,100 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2025-03-03 13:43:32,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 13:43:32,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:43:32,301 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:43:32,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:43:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash 682556395, now seen corresponding path program 3 times [2025-03-03 13:43:32,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:43:32,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039398057] [2025-03-03 13:43:32,301 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:43:32,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:43:32,307 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 6 equivalence classes. [2025-03-03 13:43:32,377 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 48 of 48 statements. [2025-03-03 13:43:32,378 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:43:32,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:43:32,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226178997] [2025-03-03 13:43:32,379 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:43:32,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:43:32,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:43:32,381 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 13:43:32,382 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 13:43:32,406 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 6 equivalence classes. [2025-03-03 13:43:32,438 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 48 of 48 statements. [2025-03-03 13:43:32,438 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:43:32,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:43:32,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-03 13:43:32,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:43:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 11 proven. 62 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 13:43:33,879 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 11 proven. 62 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 13:44:02,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:02,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039398057] [2025-03-03 13:44:02,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:02,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226178997] [2025-03-03 13:44:02,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226178997] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:02,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:02,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2025-03-03 13:44:02,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802631874] [2025-03-03 13:44:02,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:02,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-03 13:44:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:02,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-03 13:44:02,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:44:02,189 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 34 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 33 states have internal predecessors, (50), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 13:45:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:45:06,214 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2025-03-03 13:45:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 13:45:06,215 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 33 states have internal predecessors, (50), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2025-03-03 13:45:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:45:06,216 INFO L225 Difference]: With dead ends: 77 [2025-03-03 13:45:06,216 INFO L226 Difference]: Without dead ends: 75 [2025-03-03 13:45:06,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 73.9s TimeCoverageRelationStatistics Valid=507, Invalid=1653, Unknown=2, NotChecked=0, Total=2162 [2025-03-03 13:45:06,217 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2025-03-03 13:45:06,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 118 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 414 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2025-03-03 13:45:06,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-03 13:45:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2025-03-03 13:45:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-03 13:45:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2025-03-03 13:45:06,225 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 48 [2025-03-03 13:45:06,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:45:06,226 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2025-03-03 13:45:06,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 33 states have internal predecessors, (50), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 13:45:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2025-03-03 13:45:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2025-03-03 13:45:06,227 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:45:06,228 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2025-03-03 13:45:06,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 13:45:06,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:45:06,428 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:45:06,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:45:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1135458511, now seen corresponding path program 4 times [2025-03-03 13:45:06,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:45:06,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863165935] [2025-03-03 13:45:06,429 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:45:06,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:45:06,434 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 104 statements into 2 equivalence classes. [2025-03-03 13:45:06,508 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 104 of 104 statements. [2025-03-03 13:45:06,509 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:45:06,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:45:06,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611813255] [2025-03-03 13:45:06,513 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:45:06,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:45:06,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:45:06,517 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 13:45:06,520 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 13:45:06,547 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 104 statements into 2 equivalence classes. [2025-03-03 13:45:06,715 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 104 of 104 statements. [2025-03-03 13:45:06,716 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:45:06,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:45:06,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-03-03 13:45:06,720 INFO L279 TraceCheckSpWp]: Computing forward predicates...