./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.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 352373f9b097794e6947f5064b04543cec809ba042ac0b3a931e0e161838d7d3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:17:43,420 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:17:43,467 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:17:43,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:17:43,476 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:17:43,489 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:17:43,490 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:17:43,490 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:17:43,490 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:17:43,490 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:17:43,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:17:43,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:17:43,490 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:17:43,490 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:17:43,490 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:17:43,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:17:43,491 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:17:43,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:17:43,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:17:43,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:17:43,492 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:17:43,492 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:17:43,492 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:17:43,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:17:43,492 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:17:43,492 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:17:43,492 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:17:43,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:17:43,492 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 -> 352373f9b097794e6947f5064b04543cec809ba042ac0b3a931e0e161838d7d3 [2025-03-08 05:17:43,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:17:43,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:17:43,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:17:43,712 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:17:43,712 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:17:43,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2025-03-08 05:17:44,833 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c791e8314/ea803d55dae64e0e883ad217fe085df0/FLAG0d4372355 [2025-03-08 05:17:45,062 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:17:45,064 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2025-03-08 05:17:45,069 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c791e8314/ea803d55dae64e0e883ad217fe085df0/FLAG0d4372355 [2025-03-08 05:17:45,408 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c791e8314/ea803d55dae64e0e883ad217fe085df0 [2025-03-08 05:17:45,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:17:45,410 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:17:45,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:17:45,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:17:45,414 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:17:45,414 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c312171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45, skipping insertion in model container [2025-03-08 05:17:45,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,425 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:17:45,520 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2025-03-08 05:17:45,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:17:45,541 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:17:45,548 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2025-03-08 05:17:45,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:17:45,562 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:17:45,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45 WrapperNode [2025-03-08 05:17:45,563 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:17:45,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:17:45,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:17:45,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:17:45,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,574 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,587 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 40 [2025-03-08 05:17:45,588 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:17:45,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:17:45,589 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:17:45,589 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:17:45,594 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,595 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,605 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 05:17:45,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,609 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,609 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,609 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,610 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:17:45,612 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:17:45,613 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:17:45,613 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:17:45,614 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (1/1) ... [2025-03-08 05:17:45,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:17:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:17:45,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 05:17:45,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 05:17:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:17:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 05:17:45,653 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 05:17:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:17:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:17:45,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:17:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-08 05:17:45,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-08 05:17:45,690 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:17:45,692 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:17:45,806 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-08 05:17:45,806 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:17:45,813 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:17:45,813 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:17:45,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:17:45 BoogieIcfgContainer [2025-03-08 05:17:45,813 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:17:45,815 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:17:45,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:17:45,818 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:17:45,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:17:45" (1/3) ... [2025-03-08 05:17:45,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495b266b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:17:45, skipping insertion in model container [2025-03-08 05:17:45,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:17:45" (2/3) ... [2025-03-08 05:17:45,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495b266b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:17:45, skipping insertion in model container [2025-03-08 05:17:45,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:17:45" (3/3) ... [2025-03-08 05:17:45,819 INFO L128 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.c [2025-03-08 05:17:45,829 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:17:45,830 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG prodbin-ll_valuebound50.c that has 3 procedures, 26 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-08 05:17:45,860 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:17:45,871 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;@202a7ae5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:17:45,871 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:17:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:17:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 05:17:45,882 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:17:45,882 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:17:45,882 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:17:45,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:17:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -603682929, now seen corresponding path program 1 times [2025-03-08 05:17:45,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:17:45,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639154092] [2025-03-08 05:17:45,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:45,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:17:45,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:17:45,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:17:45,954 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:45,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:17:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 05:17:45,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:17:45,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639154092] [2025-03-08 05:17:45,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639154092] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:17:45,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17143922] [2025-03-08 05:17:45,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:45,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:17:45,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:17:45,992 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:17:45,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:17:46,022 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:17:46,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:17:46,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:46,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:17:46,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 05:17:46,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:17:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 05:17:46,052 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:17:46,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17143922] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:17:46,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:17:46,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 05:17:46,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627857570] [2025-03-08 05:17:46,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:17:46,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 05:17:46,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:17:46,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 05:17:46,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:17:46,070 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:17:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:17:46,084 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2025-03-08 05:17:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 05:17:46,085 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2025-03-08 05:17:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:17:46,089 INFO L225 Difference]: With dead ends: 49 [2025-03-08 05:17:46,089 INFO L226 Difference]: Without dead ends: 22 [2025-03-08 05:17:46,090 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:17:46,092 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:17:46,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:17:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-08 05:17:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-03-08 05:17:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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) [2025-03-08 05:17:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-03-08 05:17:46,113 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 23 [2025-03-08 05:17:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:17:46,113 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-03-08 05:17:46,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:17:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-03-08 05:17:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 05:17:46,115 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:17:46,116 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:17:46,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:17:46,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-08 05:17:46,320 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:17:46,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:17:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1252528, now seen corresponding path program 1 times [2025-03-08 05:17:46,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:17:46,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749190975] [2025-03-08 05:17:46,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:46,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:17:46,327 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:17:46,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:17:46,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:46,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:17:46,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617727523] [2025-03-08 05:17:46,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:46,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:17:46,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:17:46,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:17:46,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:17:46,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:17:46,400 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:17:46,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:46,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:17:46,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 05:17:46,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:17:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:17:46,568 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:17:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 05:17:46,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:17:46,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749190975] [2025-03-08 05:17:46,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:17:46,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617727523] [2025-03-08 05:17:46,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617727523] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 05:17:46,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:17:46,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2025-03-08 05:17:46,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27212938] [2025-03-08 05:17:46,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:17:46,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:17:46,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:17:46,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:17:46,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:17:46,649 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 05:17:46,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:17:46,699 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2025-03-08 05:17:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:17:46,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2025-03-08 05:17:46,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:17:46,700 INFO L225 Difference]: With dead ends: 32 [2025-03-08 05:17:46,700 INFO L226 Difference]: Without dead ends: 30 [2025-03-08 05:17:46,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:17:46,701 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:17:46,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:17:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-08 05:17:46,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2025-03-08 05:17:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:17:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2025-03-08 05:17:46,706 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2025-03-08 05:17:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:17:46,706 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2025-03-08 05:17:46,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 05:17:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2025-03-08 05:17:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-08 05:17:46,710 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:17:46,710 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:17:46,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 05:17:46,910 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,SelfDestructingSolverStorable1 [2025-03-08 05:17:46,911 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:17:46,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:17:46,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1696350775, now seen corresponding path program 1 times [2025-03-08 05:17:46,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:17:46,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976545688] [2025-03-08 05:17:46,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:46,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:17:46,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 05:17:46,926 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 05:17:46,926 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:46,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:17:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:17:47,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:17:47,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976545688] [2025-03-08 05:17:47,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976545688] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:17:47,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:17:47,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 05:17:47,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57358026] [2025-03-08 05:17:47,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:17:47,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 05:17:47,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:17:47,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 05:17:47,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:17:47,021 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:17:47,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:17:47,064 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2025-03-08 05:17:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:17:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2025-03-08 05:17:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:17:47,064 INFO L225 Difference]: With dead ends: 37 [2025-03-08 05:17:47,064 INFO L226 Difference]: Without dead ends: 30 [2025-03-08 05:17:47,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:17:47,065 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:17:47,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:17:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-08 05:17:47,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2025-03-08 05:17:47,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:17:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2025-03-08 05:17:47,070 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 29 [2025-03-08 05:17:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:17:47,070 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2025-03-08 05:17:47,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:17:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2025-03-08 05:17:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-08 05:17:47,070 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:17:47,070 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:17:47,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 05:17:47,070 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:17:47,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:17:47,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1715132203, now seen corresponding path program 1 times [2025-03-08 05:17:47,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:17:47,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876733782] [2025-03-08 05:17:47,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:47,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:17:47,080 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 05:17:47,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 05:17:47,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:47,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:17:47,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560666834] [2025-03-08 05:17:47,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:47,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:17:47,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:17:47,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:17:47,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:17:47,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 05:17:47,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 05:17:47,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:47,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:17:47,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:17:47,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:17:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 05:17:47,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:17:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 05:17:48,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:17:48,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876733782] [2025-03-08 05:17:48,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:17:48,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560666834] [2025-03-08 05:17:48,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560666834] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:17:48,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:17:48,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2025-03-08 05:17:48,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566265869] [2025-03-08 05:17:48,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:17:48,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 05:17:48,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:17:48,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 05:17:48,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:17:48,948 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 05:17:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:17:50,171 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2025-03-08 05:17:50,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:17:50,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2025-03-08 05:17:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:17:50,174 INFO L225 Difference]: With dead ends: 43 [2025-03-08 05:17:50,174 INFO L226 Difference]: Without dead ends: 41 [2025-03-08 05:17:50,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:17:50,174 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:17:50,174 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 185 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-08 05:17:50,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-08 05:17:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2025-03-08 05:17:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 05:17:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2025-03-08 05:17:50,185 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 31 [2025-03-08 05:17:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:17:50,186 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2025-03-08 05:17:50,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 05:17:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2025-03-08 05:17:50,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-08 05:17:50,186 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:17:50,186 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:17:50,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 05:17:50,387 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 [2025-03-08 05:17:50,387 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:17:50,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:17:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1686503052, now seen corresponding path program 1 times [2025-03-08 05:17:50,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:17:50,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735627928] [2025-03-08 05:17:50,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:50,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:17:50,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 05:17:50,402 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 05:17:50,403 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:50,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:17:50,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939398249] [2025-03-08 05:17:50,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:50,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:17:50,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:17:50,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:17:50,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:17:50,429 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 05:17:50,440 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 05:17:50,441 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:50,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:17:50,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:17:50,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:17:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:17:50,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:17:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:17:51,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:17:51,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735627928] [2025-03-08 05:17:51,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:17:51,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939398249] [2025-03-08 05:17:51,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939398249] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:17:51,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:17:51,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2025-03-08 05:17:51,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479535341] [2025-03-08 05:17:51,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:17:51,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 05:17:51,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:17:51,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 05:17:51,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:17:51,032 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-08 05:17:51,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:17:51,364 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2025-03-08 05:17:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 05:17:51,364 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2025-03-08 05:17:51,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:17:51,365 INFO L225 Difference]: With dead ends: 66 [2025-03-08 05:17:51,366 INFO L226 Difference]: Without dead ends: 59 [2025-03-08 05:17:51,367 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:17:51,368 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:17:51,369 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 120 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:17:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-08 05:17:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2025-03-08 05:17:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.225) internal successors, (49), 44 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-08 05:17:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2025-03-08 05:17:51,379 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 31 [2025-03-08 05:17:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:17:51,379 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2025-03-08 05:17:51,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-08 05:17:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2025-03-08 05:17:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 05:17:51,380 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:17:51,380 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:17:51,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 05:17:51,584 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 [2025-03-08 05:17:51,584 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:17:51,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:17:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash -514072932, now seen corresponding path program 1 times [2025-03-08 05:17:51,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:17:51,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517961373] [2025-03-08 05:17:51,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:51,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:17:51,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:17:51,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:17:51,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:51,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:17:51,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622245553] [2025-03-08 05:17:51,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:51,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:17:51,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:17:51,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:17:51,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:17:51,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:17:51,636 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:17:51,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:51,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:17:51,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:17:51,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:17:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-08 05:17:51,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:17:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-08 05:17:51,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:17:51,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517961373] [2025-03-08 05:17:51,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:17:51,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622245553] [2025-03-08 05:17:51,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622245553] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:17:51,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:17:51,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2025-03-08 05:17:51,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638160855] [2025-03-08 05:17:51,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:17:51,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 05:17:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:17:51,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 05:17:51,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:17:51,753 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-08 05:17:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:17:51,825 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2025-03-08 05:17:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:17:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 37 [2025-03-08 05:17:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:17:51,826 INFO L225 Difference]: With dead ends: 65 [2025-03-08 05:17:51,826 INFO L226 Difference]: Without dead ends: 58 [2025-03-08 05:17:51,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:17:51,827 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:17:51,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 134 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:17:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-08 05:17:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-03-08 05:17:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-08 05:17:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2025-03-08 05:17:51,846 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 37 [2025-03-08 05:17:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:17:51,847 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2025-03-08 05:17:51,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-08 05:17:51,847 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2025-03-08 05:17:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-08 05:17:51,851 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:17:51,852 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:17:51,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 05:17:52,052 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 [2025-03-08 05:17:52,052 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:17:52,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:17:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1695860034, now seen corresponding path program 1 times [2025-03-08 05:17:52,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:17:52,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591270154] [2025-03-08 05:17:52,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:52,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:17:52,057 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 05:17:52,090 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 05:17:52,091 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:52,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:17:52,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370650540] [2025-03-08 05:17:52,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:17:52,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:17:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:17:52,095 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:17:52,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:17:52,122 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 05:17:52,143 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 05:17:52,143 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:17:52,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:17:52,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-08 05:17:52,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:17:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 05:17:54,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:17:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 05:17:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:17:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591270154] [2025-03-08 05:17:57,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:17:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370650540] [2025-03-08 05:17:57,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370650540] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:17:57,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:17:57,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 27 [2025-03-08 05:17:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156941741] [2025-03-08 05:17:57,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:17:57,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 05:17:57,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:17:57,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 05:17:57,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:17:57,112 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2025-03-08 05:18:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:18:02,149 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2025-03-08 05:18:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 05:18:02,149 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 47 [2025-03-08 05:18:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:18:02,150 INFO L225 Difference]: With dead ends: 82 [2025-03-08 05:18:02,150 INFO L226 Difference]: Without dead ends: 80 [2025-03-08 05:18:02,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 05:18:02,151 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-08 05:18:02,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 130 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-08 05:18:02,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-08 05:18:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2025-03-08 05:18:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 12 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-08 05:18:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2025-03-08 05:18:02,164 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 47 [2025-03-08 05:18:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:18:02,164 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2025-03-08 05:18:02,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2025-03-08 05:18:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2025-03-08 05:18:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-08 05:18:02,165 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:18:02,165 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:18:02,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 05:18:02,365 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 [2025-03-08 05:18:02,365 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:18:02,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:18:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash -4268767, now seen corresponding path program 2 times [2025-03-08 05:18:02,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:18:02,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395263187] [2025-03-08 05:18:02,366 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:18:02,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:18:02,372 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-08 05:18:02,407 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 05:18:02,407 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:18:02,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:18:02,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635225565] [2025-03-08 05:18:02,411 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:18:02,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:18:02,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:18:02,413 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:18:02,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:18:02,435 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-08 05:18:02,449 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 05:18:02,449 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:18:02,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:18:02,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-08 05:18:02,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:18:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 05:18:03,159 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:18:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-08 05:18:14,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:18:14,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395263187] [2025-03-08 05:18:14,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:18:14,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635225565] [2025-03-08 05:18:14,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635225565] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:18:14,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:18:14,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 29 [2025-03-08 05:18:14,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711741924] [2025-03-08 05:18:14,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:18:14,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 05:18:14,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:18:14,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 05:18:14,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2025-03-08 05:18:14,428 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 29 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 10 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-08 05:18:33,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-08 05:18:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:18:33,432 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2025-03-08 05:18:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 05:18:33,433 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 10 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 55 [2025-03-08 05:18:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:18:33,434 INFO L225 Difference]: With dead ends: 120 [2025-03-08 05:18:33,434 INFO L226 Difference]: Without dead ends: 118 [2025-03-08 05:18:33,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:18:33,435 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2025-03-08 05:18:33,435 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 166 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 534 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2025-03-08 05:18:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-08 05:18:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2025-03-08 05:18:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 89 states have internal predecessors, (101), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 19 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-08 05:18:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2025-03-08 05:18:33,447 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 55 [2025-03-08 05:18:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:18:33,447 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2025-03-08 05:18:33,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 10 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-08 05:18:33,447 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2025-03-08 05:18:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-08 05:18:33,448 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:18:33,448 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:18:33,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 05:18:33,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:18:33,649 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:18:33,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:18:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash 620023781, now seen corresponding path program 3 times [2025-03-08 05:18:33,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:18:33,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295024897] [2025-03-08 05:18:33,649 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:18:33,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:18:33,653 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 63 statements into 6 equivalence classes. [2025-03-08 05:18:33,699 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 63 of 63 statements. [2025-03-08 05:18:33,700 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 05:18:33,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:18:33,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595439584] [2025-03-08 05:18:33,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:18:33,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:18:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:18:33,703 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:18:33,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:18:33,731 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 63 statements into 6 equivalence classes. [2025-03-08 05:18:33,754 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 63 of 63 statements. [2025-03-08 05:18:33,754 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 05:18:33,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:18:33,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-08 05:18:33,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:18:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 12 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 05:18:34,851 INFO L312 TraceCheckSpWp]: Computing backward predicates...