./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.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 c8cdca66dc863bfa94d37a0903946c6b89240a08b13e8fd34226289180db2a40 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:59:18,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:59:18,872 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:59:18,876 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:59:18,876 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:59:18,895 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:59:18,896 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:59:18,896 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:59:18,896 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:59:18,897 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:59:18,897 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:59:18,897 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:59:18,898 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:59:18,898 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:59:18,898 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:59:18,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:59:18,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:59:18,898 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:59:18,899 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:59:18,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:59:18,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:59:18,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:59:18,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:59:18,900 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:59:18,900 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:59:18,900 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:59:18,900 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:59:18,900 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:59:18,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:59:18,900 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:59:18,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:59:18,901 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:59:18,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:59:18,901 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 -> c8cdca66dc863bfa94d37a0903946c6b89240a08b13e8fd34226289180db2a40 [2025-03-03 13:59:19,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:59:19,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:59:19,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:59:19,104 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:59:19,104 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:59:19,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2025-03-03 13:59:20,203 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a14a0a739/eff283885c01443ca7e68e097800ad5e/FLAGdc7382629 [2025-03-03 13:59:20,398 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:59:20,400 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2025-03-03 13:59:20,406 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a14a0a739/eff283885c01443ca7e68e097800ad5e/FLAGdc7382629 [2025-03-03 13:59:20,440 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a14a0a739/eff283885c01443ca7e68e097800ad5e [2025-03-03 13:59:20,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:59:20,445 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:59:20,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:59:20,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:59:20,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:59:20,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea24f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20, skipping insertion in model container [2025-03-03 13:59:20,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,468 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:59:20,569 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/hard-ll_unwindbound10.c[538,551] [2025-03-03 13:59:20,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:59:20,596 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:59:20,602 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/hard-ll_unwindbound10.c[538,551] [2025-03-03 13:59:20,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:59:20,618 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:59:20,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20 WrapperNode [2025-03-03 13:59:20,619 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:59:20,620 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:59:20,620 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:59:20,620 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:59:20,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,629 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,639 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2025-03-03 13:59:20,639 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:59:20,639 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:59:20,639 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:59:20,639 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:59:20,644 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,645 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,657 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 13:59:20,657 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,657 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,659 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,660 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,661 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:59:20,662 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:59:20,662 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:59:20,662 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:59:20,663 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (1/1) ... [2025-03-03 13:59:20,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:59:20,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:20,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 13:59:20,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 13:59:20,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:59:20,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:59:20,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:59:20,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:59:20,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:59:20,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:59:20,742 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:59:20,743 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:59:20,875 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-03 13:59:20,875 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:59:20,885 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:59:20,886 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:59:20,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:59:20 BoogieIcfgContainer [2025-03-03 13:59:20,886 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:59:20,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:59:20,888 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:59:20,891 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:59:20,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:59:20" (1/3) ... [2025-03-03 13:59:20,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27549c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:59:20, skipping insertion in model container [2025-03-03 13:59:20,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:59:20" (2/3) ... [2025-03-03 13:59:20,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27549c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:59:20, skipping insertion in model container [2025-03-03 13:59:20,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:59:20" (3/3) ... [2025-03-03 13:59:20,894 INFO L128 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound10.c [2025-03-03 13:59:20,904 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:59:20,906 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hard-ll_unwindbound10.c that has 2 procedures, 28 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 13:59:20,944 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:59:20,954 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;@54be5b0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:59:20,954 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:59:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 13:59:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 13:59:20,962 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:20,962 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:20,963 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:20,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -841661746, now seen corresponding path program 1 times [2025-03-03 13:59:20,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:20,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634454338] [2025-03-03 13:59:20,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:20,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:21,024 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 13:59:21,036 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 13:59:21,037 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:21,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:59:21,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:21,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634454338] [2025-03-03 13:59:21,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634454338] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:59:21,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:59:21,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-03 13:59:21,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482744834] [2025-03-03 13:59:21,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:59:21,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 13:59:21,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:21,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 13:59:21,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:59:21,096 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:59:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:21,108 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2025-03-03 13:59:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 13:59:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-03 13:59:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:21,114 INFO L225 Difference]: With dead ends: 53 [2025-03-03 13:59:21,114 INFO L226 Difference]: Without dead ends: 24 [2025-03-03 13:59:21,116 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:59:21,117 INFO L435 NwaCegarLoop]: 38 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, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:21,118 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:59:21,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-03 13:59:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-03-03 13:59:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:59:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2025-03-03 13:59:21,144 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2025-03-03 13:59:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:21,144 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2025-03-03 13:59:21,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:59:21,145 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2025-03-03 13:59:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 13:59:21,145 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:21,146 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:21,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 13:59:21,146 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:21,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:21,147 INFO L85 PathProgramCache]: Analyzing trace with hash 901148589, now seen corresponding path program 1 times [2025-03-03 13:59:21,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:21,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866719744] [2025-03-03 13:59:21,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:21,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:21,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 13:59:21,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 13:59:21,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:21,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:59:21,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:21,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866719744] [2025-03-03 13:59:21,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866719744] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:59:21,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:59:21,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:59:21,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776647786] [2025-03-03 13:59:21,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:59:21,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:59:21,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:21,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:59:21,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:59:21,314 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:59:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:21,364 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2025-03-03 13:59:21,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:59:21,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-03 13:59:21,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:21,366 INFO L225 Difference]: With dead ends: 38 [2025-03-03 13:59:21,366 INFO L226 Difference]: Without dead ends: 36 [2025-03-03 13:59:21,366 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:59:21,366 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:21,367 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 104 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:59:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-03 13:59:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2025-03-03 13:59:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:59:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2025-03-03 13:59:21,376 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2025-03-03 13:59:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:21,376 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2025-03-03 13:59:21,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:59:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2025-03-03 13:59:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-03 13:59:21,376 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:21,376 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:21,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 13:59:21,376 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:21,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:21,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1774160750, now seen corresponding path program 1 times [2025-03-03 13:59:21,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:21,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676815165] [2025-03-03 13:59:21,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:21,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:21,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-03 13:59:21,392 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-03 13:59:21,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:21,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:59:21,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:21,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676815165] [2025-03-03 13:59:21,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676815165] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:59:21,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:59:21,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 13:59:21,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209501040] [2025-03-03 13:59:21,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:59:21,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 13:59:21,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:21,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 13:59:21,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:59:21,451 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:59:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:21,469 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2025-03-03 13:59:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 13:59:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-03 13:59:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:21,472 INFO L225 Difference]: With dead ends: 44 [2025-03-03 13:59:21,472 INFO L226 Difference]: Without dead ends: 30 [2025-03-03 13:59:21,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:59:21,472 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:21,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:59:21,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-03 13:59:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-03 13:59:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:59:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2025-03-03 13:59:21,480 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2025-03-03 13:59:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:21,480 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2025-03-03 13:59:21,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:59:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2025-03-03 13:59:21,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-03 13:59:21,481 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:21,481 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:21,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 13:59:21,481 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:21,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1142350440, now seen corresponding path program 1 times [2025-03-03 13:59:21,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:21,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234632057] [2025-03-03 13:59:21,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:21,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:21,486 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-03 13:59:21,490 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-03 13:59:21,490 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:21,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:59:21,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:21,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234632057] [2025-03-03 13:59:21,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234632057] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:59:21,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:59:21,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:59:21,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24360050] [2025-03-03 13:59:21,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:59:21,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:59:21,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:21,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:59:21,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:59:21,558 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 13:59:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:21,628 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2025-03-03 13:59:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:59:21,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-03-03 13:59:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:21,629 INFO L225 Difference]: With dead ends: 44 [2025-03-03 13:59:21,629 INFO L226 Difference]: Without dead ends: 42 [2025-03-03 13:59:21,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:59:21,630 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:21,630 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:59:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-03 13:59:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2025-03-03 13:59:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:59:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2025-03-03 13:59:21,638 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2025-03-03 13:59:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:21,639 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2025-03-03 13:59:21,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 13:59:21,639 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2025-03-03 13:59:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-03 13:59:21,640 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:21,641 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:21,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-03 13:59:21,642 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:21,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:21,642 INFO L85 PathProgramCache]: Analyzing trace with hash 205542093, now seen corresponding path program 1 times [2025-03-03 13:59:21,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:21,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341800767] [2025-03-03 13:59:21,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:21,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:21,648 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 13:59:21,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 13:59:21,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:21,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:59:21,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852166761] [2025-03-03 13:59:21,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:21,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:21,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:21,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:21,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:59:21,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 13:59:21,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 13:59:21,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:21,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:21,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:59:21,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:59:21,791 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:59:21,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:21,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341800767] [2025-03-03 13:59:21,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:59:21,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852166761] [2025-03-03 13:59:21,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852166761] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:59:21,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:59:21,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:59:21,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363471639] [2025-03-03 13:59:21,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:59:21,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:59:21,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:21,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:59:21,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:59:21,794 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:59:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:21,855 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2025-03-03 13:59:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:59:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2025-03-03 13:59:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:21,856 INFO L225 Difference]: With dead ends: 63 [2025-03-03 13:59:21,857 INFO L226 Difference]: Without dead ends: 48 [2025-03-03 13:59:21,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:59:21,858 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:21,858 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 105 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:59:21,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-03 13:59:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-03-03 13:59:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-03 13:59:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2025-03-03 13:59:21,865 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 20 [2025-03-03 13:59:21,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:21,865 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2025-03-03 13:59:21,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:59:21,866 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2025-03-03 13:59:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-03 13:59:21,866 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:21,866 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:21,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 13:59:22,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:22,070 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:22,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:22,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1822786374, now seen corresponding path program 1 times [2025-03-03 13:59:22,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:22,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773609678] [2025-03-03 13:59:22,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:22,074 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-03 13:59:22,089 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 13:59:22,089 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:22,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:59:22,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216678842] [2025-03-03 13:59:22,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:22,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:22,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:22,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:22,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:59:22,122 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-03 13:59:22,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 13:59:22,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:22,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:22,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-03 13:59:22,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 13:59:22,230 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 13:59:22,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:22,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773609678] [2025-03-03 13:59:22,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:59:22,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216678842] [2025-03-03 13:59:22,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216678842] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:22,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:59:22,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2025-03-03 13:59:22,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524097703] [2025-03-03 13:59:22,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:22,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 13:59:22,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:22,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 13:59:22,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:59:22,385 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:59:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:22,473 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2025-03-03 13:59:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 13:59:22,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2025-03-03 13:59:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:22,475 INFO L225 Difference]: With dead ends: 66 [2025-03-03 13:59:22,475 INFO L226 Difference]: Without dead ends: 63 [2025-03-03 13:59:22,475 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-03 13:59:22,476 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:22,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 116 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:59:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-03 13:59:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2025-03-03 13:59:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 39 states have internal predecessors, (47), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-03 13:59:22,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2025-03-03 13:59:22,488 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 28 [2025-03-03 13:59:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:22,489 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2025-03-03 13:59:22,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:59:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2025-03-03 13:59:22,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-03 13:59:22,490 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:22,490 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:22,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:22,690 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,SelfDestructingSolverStorable5 [2025-03-03 13:59:22,690 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:22,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:22,691 INFO L85 PathProgramCache]: Analyzing trace with hash 182754622, now seen corresponding path program 1 times [2025-03-03 13:59:22,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:22,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164925763] [2025-03-03 13:59:22,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:22,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:22,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-03 13:59:22,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 13:59:22,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:22,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:59:22,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:22,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164925763] [2025-03-03 13:59:22,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164925763] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:22,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418507168] [2025-03-03 13:59:22,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:22,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:22,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:22,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:22,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:59:22,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-03 13:59:22,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 13:59:22,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:22,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:22,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-03 13:59:22,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-03 13:59:22,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:59:22,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418507168] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:22,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:59:22,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2025-03-03 13:59:22,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25856863] [2025-03-03 13:59:22,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:22,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:59:22,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:22,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:59:22,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:59:22,897 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-03 13:59:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:22,978 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2025-03-03 13:59:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 13:59:22,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 35 [2025-03-03 13:59:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:22,979 INFO L225 Difference]: With dead ends: 157 [2025-03-03 13:59:22,979 INFO L226 Difference]: Without dead ends: 132 [2025-03-03 13:59:22,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-03 13:59:22,980 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:22,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 119 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:59:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-03-03 13:59:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2025-03-03 13:59:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 85 states have internal predecessors, (97), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 13:59:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2025-03-03 13:59:22,992 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 35 [2025-03-03 13:59:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:22,993 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2025-03-03 13:59:22,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-03 13:59:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2025-03-03 13:59:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 13:59:22,993 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:22,993 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:22,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 13:59:23,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:23,197 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:23,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:23,198 INFO L85 PathProgramCache]: Analyzing trace with hash 345705026, now seen corresponding path program 1 times [2025-03-03 13:59:23,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:23,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260090375] [2025-03-03 13:59:23,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:23,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:23,202 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 13:59:23,208 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:59:23,208 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:23,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:59:23,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068500324] [2025-03-03 13:59:23,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:23,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:23,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:23,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:23,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:59:23,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 13:59:23,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:59:23,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:23,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:23,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 13:59:23,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 13:59:23,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:59:23,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:23,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260090375] [2025-03-03 13:59:23,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:59:23,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068500324] [2025-03-03 13:59:23,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068500324] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:23,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:59:23,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-03-03 13:59:23,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728994998] [2025-03-03 13:59:23,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:59:23,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:59:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:23,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:59:23,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:59:23,375 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 13:59:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:23,441 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2025-03-03 13:59:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:59:23,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2025-03-03 13:59:23,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:23,442 INFO L225 Difference]: With dead ends: 148 [2025-03-03 13:59:23,442 INFO L226 Difference]: Without dead ends: 142 [2025-03-03 13:59:23,442 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:59:23,443 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:23,443 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:59:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-03-03 13:59:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2025-03-03 13:59:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 92 states have internal predecessors, (103), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2025-03-03 13:59:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 157 transitions. [2025-03-03 13:59:23,459 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 157 transitions. Word has length 38 [2025-03-03 13:59:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:23,459 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 157 transitions. [2025-03-03 13:59:23,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 13:59:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 157 transitions. [2025-03-03 13:59:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-03 13:59:23,461 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:23,461 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:23,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:23,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:23,662 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:23,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:23,662 INFO L85 PathProgramCache]: Analyzing trace with hash 62896557, now seen corresponding path program 1 times [2025-03-03 13:59:23,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:23,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936674473] [2025-03-03 13:59:23,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:23,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:23,666 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-03 13:59:23,670 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:59:23,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:23,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 13:59:23,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:23,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936674473] [2025-03-03 13:59:23,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936674473] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:59:23,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:59:23,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:59:23,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662129241] [2025-03-03 13:59:23,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:59:23,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:59:23,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:23,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:59:23,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:59:23,777 INFO L87 Difference]: Start difference. First operand 134 states and 157 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 13:59:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:23,813 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2025-03-03 13:59:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:59:23,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2025-03-03 13:59:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:23,814 INFO L225 Difference]: With dead ends: 139 [2025-03-03 13:59:23,814 INFO L226 Difference]: Without dead ends: 120 [2025-03-03 13:59:23,814 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:59:23,815 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:23,815 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 118 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:59:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-03-03 13:59:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2025-03-03 13:59:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 82 states have internal predecessors, (93), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2025-03-03 13:59:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2025-03-03 13:59:23,835 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 44 [2025-03-03 13:59:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:23,835 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2025-03-03 13:59:23,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 13:59:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2025-03-03 13:59:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 13:59:23,837 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:23,837 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:23,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-03 13:59:23,837 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:23,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash 898461349, now seen corresponding path program 1 times [2025-03-03 13:59:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:23,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108945168] [2025-03-03 13:59:23,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:23,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 13:59:23,850 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 13:59:23,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:23,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 13:59:23,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:23,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108945168] [2025-03-03 13:59:23,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108945168] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:23,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632479988] [2025-03-03 13:59:23,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:23,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:23,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:23,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:23,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:59:23,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 13:59:23,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 13:59:23,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:23,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:23,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:59:23,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-03 13:59:23,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 13:59:24,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632479988] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:24,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:59:24,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-03-03 13:59:24,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928661027] [2025-03-03 13:59:24,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:24,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 13:59:24,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:24,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 13:59:24,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:59:24,061 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2025-03-03 13:59:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:24,199 INFO L93 Difference]: Finished difference Result 243 states and 296 transitions. [2025-03-03 13:59:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 13:59:24,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 51 [2025-03-03 13:59:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:24,201 INFO L225 Difference]: With dead ends: 243 [2025-03-03 13:59:24,201 INFO L226 Difference]: Without dead ends: 222 [2025-03-03 13:59:24,201 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:59:24,201 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 80 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:24,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 183 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:59:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2025-03-03 13:59:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2025-03-03 13:59:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 149 states have internal predecessors, (167), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2025-03-03 13:59:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 261 transitions. [2025-03-03 13:59:24,225 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 261 transitions. Word has length 51 [2025-03-03 13:59:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:24,225 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 261 transitions. [2025-03-03 13:59:24,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2025-03-03 13:59:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 261 transitions. [2025-03-03 13:59:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-03 13:59:24,226 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:24,226 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:24,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:24,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 13:59:24,427 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:24,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:24,427 INFO L85 PathProgramCache]: Analyzing trace with hash -387521360, now seen corresponding path program 1 times [2025-03-03 13:59:24,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:24,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113231668] [2025-03-03 13:59:24,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:24,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:24,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-03 13:59:24,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-03 13:59:24,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:24,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:59:24,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951603592] [2025-03-03 13:59:24,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:24,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:24,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:24,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:24,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:59:24,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-03 13:59:24,501 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-03 13:59:24,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:24,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:24,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-03 13:59:24,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-03-03 13:59:24,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-03-03 13:59:26,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:26,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113231668] [2025-03-03 13:59:26,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:59:26,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951603592] [2025-03-03 13:59:26,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951603592] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:26,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:59:26,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2025-03-03 13:59:26,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904059021] [2025-03-03 13:59:26,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:26,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 13:59:26,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:26,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 13:59:26,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:59:26,513 INFO L87 Difference]: Start difference. First operand 215 states and 261 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-03 13:59:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:27,310 INFO L93 Difference]: Finished difference Result 379 states and 486 transitions. [2025-03-03 13:59:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:59:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2025-03-03 13:59:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:27,313 INFO L225 Difference]: With dead ends: 379 [2025-03-03 13:59:27,313 INFO L226 Difference]: Without dead ends: 303 [2025-03-03 13:59:27,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:59:27,314 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 102 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:27,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 419 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:59:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2025-03-03 13:59:27,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 265. [2025-03-03 13:59:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 178 states have (on average 1.202247191011236) internal successors, (214), 187 states have internal predecessors, (214), 55 states have call successors, (55), 31 states have call predecessors, (55), 31 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2025-03-03 13:59:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 321 transitions. [2025-03-03 13:59:27,350 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 321 transitions. Word has length 60 [2025-03-03 13:59:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:27,350 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 321 transitions. [2025-03-03 13:59:27,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-03 13:59:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 321 transitions. [2025-03-03 13:59:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-03 13:59:27,352 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:27,352 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:27,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:27,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:27,557 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:27,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:27,557 INFO L85 PathProgramCache]: Analyzing trace with hash -289430514, now seen corresponding path program 1 times [2025-03-03 13:59:27,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:27,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345138726] [2025-03-03 13:59:27,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:27,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:27,562 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-03 13:59:27,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-03 13:59:27,580 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:27,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:59:27,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263819050] [2025-03-03 13:59:27,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:27,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:27,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:27,584 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:27,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:59:27,610 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-03 13:59:27,626 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-03 13:59:27,626 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:27,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:27,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-03 13:59:27,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-03 13:59:27,972 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-03 13:59:28,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:28,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345138726] [2025-03-03 13:59:28,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:59:28,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263819050] [2025-03-03 13:59:28,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263819050] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:28,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:59:28,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2025-03-03 13:59:28,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107915362] [2025-03-03 13:59:28,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:28,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 13:59:28,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:28,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 13:59:28,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:59:28,444 INFO L87 Difference]: Start difference. First operand 265 states and 321 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2025-03-03 13:59:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:28,936 INFO L93 Difference]: Finished difference Result 389 states and 483 transitions. [2025-03-03 13:59:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 13:59:28,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 71 [2025-03-03 13:59:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:28,938 INFO L225 Difference]: With dead ends: 389 [2025-03-03 13:59:28,938 INFO L226 Difference]: Without dead ends: 320 [2025-03-03 13:59:28,939 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:59:28,939 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 71 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:28,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 389 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:59:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2025-03-03 13:59:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 271. [2025-03-03 13:59:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 183 states have (on average 1.2021857923497268) internal successors, (220), 188 states have internal predecessors, (220), 56 states have call successors, (56), 32 states have call predecessors, (56), 31 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2025-03-03 13:59:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 329 transitions. [2025-03-03 13:59:28,970 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 329 transitions. Word has length 71 [2025-03-03 13:59:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:28,971 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 329 transitions. [2025-03-03 13:59:28,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2025-03-03 13:59:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 329 transitions. [2025-03-03 13:59:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-03 13:59:28,971 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:28,971 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:28,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 13:59:29,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:29,172 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:29,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:29,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1903297253, now seen corresponding path program 2 times [2025-03-03 13:59:29,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:29,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765751348] [2025-03-03 13:59:29,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:59:29,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:29,177 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-03-03 13:59:29,185 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-03-03 13:59:29,186 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:59:29,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-03 13:59:29,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:29,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765751348] [2025-03-03 13:59:29,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765751348] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:29,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248313885] [2025-03-03 13:59:29,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:59:29,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:29,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:29,328 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:29,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:59:29,352 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 74 statements into 2 equivalence classes. [2025-03-03 13:59:29,369 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-03-03 13:59:29,369 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:59:29,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:29,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:59:29,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-03 13:59:29,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-03 13:59:29,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248313885] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:29,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:59:29,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2025-03-03 13:59:29,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335361870] [2025-03-03 13:59:29,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:29,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:59:29,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:29,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:59:29,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:59:29,453 INFO L87 Difference]: Start difference. First operand 271 states and 329 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-03 13:59:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:29,504 INFO L93 Difference]: Finished difference Result 309 states and 376 transitions. [2025-03-03 13:59:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 13:59:29,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 74 [2025-03-03 13:59:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:29,506 INFO L225 Difference]: With dead ends: 309 [2025-03-03 13:59:29,506 INFO L226 Difference]: Without dead ends: 256 [2025-03-03 13:59:29,506 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:59:29,507 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:29,507 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:59:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2025-03-03 13:59:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 248. [2025-03-03 13:59:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 169 states have (on average 1.183431952662722) internal successors, (200), 172 states have internal predecessors, (200), 49 states have call successors, (49), 30 states have call predecessors, (49), 29 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2025-03-03 13:59:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 296 transitions. [2025-03-03 13:59:29,537 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 296 transitions. Word has length 74 [2025-03-03 13:59:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:29,538 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 296 transitions. [2025-03-03 13:59:29,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-03 13:59:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 296 transitions. [2025-03-03 13:59:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-03 13:59:29,539 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:29,539 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:29,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:29,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 13:59:29,739 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:29,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:29,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1586165993, now seen corresponding path program 1 times [2025-03-03 13:59:29,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:29,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833253570] [2025-03-03 13:59:29,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:29,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:29,743 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-03-03 13:59:29,750 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 13:59:29,752 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:29,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 13:59:29,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:29,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833253570] [2025-03-03 13:59:29,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833253570] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:29,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914185271] [2025-03-03 13:59:29,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:29,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:29,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:29,980 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:29,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:59:30,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-03-03 13:59:30,020 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 13:59:30,020 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:30,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:30,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 13:59:30,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 13:59:30,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 13:59:30,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914185271] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:30,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:59:30,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2025-03-03 13:59:30,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526765919] [2025-03-03 13:59:30,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:30,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 13:59:30,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:30,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 13:59:30,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:59:30,510 INFO L87 Difference]: Start difference. First operand 248 states and 296 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2025-03-03 13:59:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:30,687 INFO L93 Difference]: Finished difference Result 264 states and 319 transitions. [2025-03-03 13:59:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:59:30,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 76 [2025-03-03 13:59:30,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:30,688 INFO L225 Difference]: With dead ends: 264 [2025-03-03 13:59:30,689 INFO L226 Difference]: Without dead ends: 239 [2025-03-03 13:59:30,689 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:59:30,689 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:30,689 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 342 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:59:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2025-03-03 13:59:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 229. [2025-03-03 13:59:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 156 states have (on average 1.1923076923076923) internal successors, (186), 159 states have internal predecessors, (186), 45 states have call successors, (45), 28 states have call predecessors, (45), 27 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2025-03-03 13:59:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2025-03-03 13:59:30,713 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 76 [2025-03-03 13:59:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:30,713 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2025-03-03 13:59:30,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2025-03-03 13:59:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2025-03-03 13:59:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-03-03 13:59:30,714 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:30,714 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:30,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:30,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 13:59:30,915 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:30,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1809434793, now seen corresponding path program 1 times [2025-03-03 13:59:30,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:30,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31145527] [2025-03-03 13:59:30,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:30,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:30,918 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-03-03 13:59:30,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-03-03 13:59:30,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:30,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-03-03 13:59:30,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:30,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31145527] [2025-03-03 13:59:30,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31145527] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:30,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142669251] [2025-03-03 13:59:30,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:30,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:30,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:30,972 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:30,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:59:30,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-03-03 13:59:31,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-03-03 13:59:31,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:31,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:31,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 13:59:31,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-03-03 13:59:31,041 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:59:31,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142669251] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:59:31,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:59:31,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2025-03-03 13:59:31,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645136654] [2025-03-03 13:59:31,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:59:31,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:59:31,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:31,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:59:31,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:59:31,042 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 13:59:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:31,106 INFO L93 Difference]: Finished difference Result 250 states and 300 transitions. [2025-03-03 13:59:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:59:31,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 80 [2025-03-03 13:59:31,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:31,108 INFO L225 Difference]: With dead ends: 250 [2025-03-03 13:59:31,108 INFO L226 Difference]: Without dead ends: 230 [2025-03-03 13:59:31,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:59:31,108 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 12 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:31,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 131 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:59:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2025-03-03 13:59:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2025-03-03 13:59:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 152 states have (on average 1.1578947368421053) internal successors, (176), 154 states have internal predecessors, (176), 43 states have call successors, (43), 26 states have call predecessors, (43), 26 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2025-03-03 13:59:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2025-03-03 13:59:31,154 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 80 [2025-03-03 13:59:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:31,154 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2025-03-03 13:59:31,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 13:59:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2025-03-03 13:59:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-03 13:59:31,155 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:31,155 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:31,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:31,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 13:59:31,356 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:31,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:31,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1631031142, now seen corresponding path program 3 times [2025-03-03 13:59:31,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:31,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692563806] [2025-03-03 13:59:31,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:59:31,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:31,361 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 8 equivalence classes. [2025-03-03 13:59:31,396 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 13:59:31,397 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-03 13:59:31,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:59:31,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071377468] [2025-03-03 13:59:31,398 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:59:31,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:31,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:31,400 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:31,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:59:31,422 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 8 equivalence classes. [2025-03-03 13:59:31,443 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 64 of 92 statements. [2025-03-03 13:59:31,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:59:31,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:31,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-03 13:59:31,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2025-03-03 13:59:31,932 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2025-03-03 13:59:45,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:45,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692563806] [2025-03-03 13:59:45,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:59:45,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071377468] [2025-03-03 13:59:45,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071377468] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:45,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:59:45,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2025-03-03 13:59:45,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619906080] [2025-03-03 13:59:45,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:45,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:59:45,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:45,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:59:45,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:59:45,142 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2025-03-03 13:59:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:49,265 INFO L93 Difference]: Finished difference Result 296 states and 378 transitions. [2025-03-03 13:59:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 13:59:49,265 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 92 [2025-03-03 13:59:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:49,267 INFO L225 Difference]: With dead ends: 296 [2025-03-03 13:59:49,267 INFO L226 Difference]: Without dead ends: 272 [2025-03-03 13:59:49,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:59:49,268 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 127 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:49,268 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 490 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-03 13:59:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2025-03-03 13:59:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 250. [2025-03-03 13:59:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 168 states have (on average 1.1845238095238095) internal successors, (199), 175 states have internal predecessors, (199), 54 states have call successors, (54), 27 states have call predecessors, (54), 27 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2025-03-03 13:59:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 306 transitions. [2025-03-03 13:59:49,302 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 306 transitions. Word has length 92 [2025-03-03 13:59:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:49,303 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 306 transitions. [2025-03-03 13:59:49,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2025-03-03 13:59:49,303 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 306 transitions. [2025-03-03 13:59:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-03 13:59:49,304 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:49,304 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:49,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 13:59:49,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-03 13:59:49,505 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:49,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash 617808032, now seen corresponding path program 1 times [2025-03-03 13:59:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:49,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942844572] [2025-03-03 13:59:49,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:49,510 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-03 13:59:49,516 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 13:59:49,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:49,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2025-03-03 13:59:49,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:49,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942844572] [2025-03-03 13:59:49,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942844572] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:49,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624666802] [2025-03-03 13:59:49,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:49,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:49,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:49,607 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:49,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:59:49,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-03 13:59:49,649 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 13:59:49,649 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:49,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:49,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 13:59:49,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-03 13:59:49,716 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2025-03-03 13:59:49,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624666802] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:49,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:59:49,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2025-03-03 13:59:49,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116298231] [2025-03-03 13:59:49,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:49,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:59:49,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:49,807 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:59:49,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:59:49,808 INFO L87 Difference]: Start difference. First operand 250 states and 306 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2025-03-03 13:59:50,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:50,060 INFO L93 Difference]: Finished difference Result 632 states and 806 transitions. [2025-03-03 13:59:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 13:59:50,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 98 [2025-03-03 13:59:50,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:50,062 INFO L225 Difference]: With dead ends: 632 [2025-03-03 13:59:50,062 INFO L226 Difference]: Without dead ends: 537 [2025-03-03 13:59:50,063 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:59:50,063 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 145 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:50,063 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 191 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:59:50,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2025-03-03 13:59:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 516. [2025-03-03 13:59:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 337 states have (on average 1.2166172106824926) internal successors, (410), 361 states have internal predecessors, (410), 120 states have call successors, (120), 58 states have call predecessors, (120), 58 states have return successors, (115), 96 states have call predecessors, (115), 115 states have call successors, (115) [2025-03-03 13:59:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 645 transitions. [2025-03-03 13:59:50,146 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 645 transitions. Word has length 98 [2025-03-03 13:59:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:50,147 INFO L471 AbstractCegarLoop]: Abstraction has 516 states and 645 transitions. [2025-03-03 13:59:50,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2025-03-03 13:59:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 645 transitions. [2025-03-03 13:59:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-03-03 13:59:50,148 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:50,148 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:50,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 13:59:50,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 13:59:50,349 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:50,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:50,349 INFO L85 PathProgramCache]: Analyzing trace with hash -278240796, now seen corresponding path program 2 times [2025-03-03 13:59:50,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:50,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508775657] [2025-03-03 13:59:50,349 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:59:50,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:50,353 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 103 statements into 2 equivalence classes. [2025-03-03 13:59:50,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 103 of 103 statements. [2025-03-03 13:59:50,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:59:50,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:59:50,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803937821] [2025-03-03 13:59:50,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:59:50,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:50,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:50,383 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:50,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:59:50,410 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 103 statements into 2 equivalence classes. [2025-03-03 13:59:50,445 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 103 of 103 statements. [2025-03-03 13:59:50,445 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:59:50,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:50,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-03 13:59:50,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 67 proven. 75 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2025-03-03 13:59:51,032 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:51,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508775657] [2025-03-03 13:59:51,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:59:51,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803937821] [2025-03-03 13:59:51,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803937821] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:51,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:59:51,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-03 13:59:51,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144723098] [2025-03-03 13:59:51,402 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:51,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:59:51,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:51,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:59:51,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:59:51,403 INFO L87 Difference]: Start difference. First operand 516 states and 645 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2025-03-03 13:59:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:51,747 INFO L93 Difference]: Finished difference Result 604 states and 752 transitions. [2025-03-03 13:59:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 13:59:51,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2025-03-03 13:59:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:51,750 INFO L225 Difference]: With dead ends: 604 [2025-03-03 13:59:51,750 INFO L226 Difference]: Without dead ends: 526 [2025-03-03 13:59:51,750 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:59:51,750 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:51,750 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 467 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:59:51,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2025-03-03 13:59:51,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 514. [2025-03-03 13:59:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 338 states have (on average 1.2011834319526626) internal successors, (406), 359 states have internal predecessors, (406), 115 states have call successors, (115), 60 states have call predecessors, (115), 60 states have return successors, (111), 94 states have call predecessors, (111), 111 states have call successors, (111) [2025-03-03 13:59:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 632 transitions. [2025-03-03 13:59:51,830 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 632 transitions. Word has length 103 [2025-03-03 13:59:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:51,830 INFO L471 AbstractCegarLoop]: Abstraction has 514 states and 632 transitions. [2025-03-03 13:59:51,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2025-03-03 13:59:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 632 transitions. [2025-03-03 13:59:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-03-03 13:59:51,831 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:51,831 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:51,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:52,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 13:59:52,032 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:52,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1275313149, now seen corresponding path program 1 times [2025-03-03 13:59:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629667288] [2025-03-03 13:59:52,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:52,037 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 103 statements into 1 equivalence classes. [2025-03-03 13:59:52,055 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 103 of 103 statements. [2025-03-03 13:59:52,055 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:52,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:59:52,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893988722] [2025-03-03 13:59:52,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:52,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:52,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:52,058 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:52,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:59:52,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 103 statements into 1 equivalence classes. [2025-03-03 13:59:52,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 103 of 103 statements. [2025-03-03 13:59:52,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:52,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:52,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-03 13:59:52,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 58 proven. 84 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2025-03-03 13:59:52,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:54,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:54,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629667288] [2025-03-03 13:59:54,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:59:54,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893988722] [2025-03-03 13:59:54,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893988722] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:54,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:59:54,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-03 13:59:54,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052364276] [2025-03-03 13:59:54,002 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:54,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:59:54,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:54,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:59:54,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:59:54,003 INFO L87 Difference]: Start difference. First operand 514 states and 632 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2025-03-03 13:59:54,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:54,377 INFO L93 Difference]: Finished difference Result 522 states and 640 transitions. [2025-03-03 13:59:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:59:54,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2025-03-03 13:59:54,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:54,380 INFO L225 Difference]: With dead ends: 522 [2025-03-03 13:59:54,381 INFO L226 Difference]: Without dead ends: 520 [2025-03-03 13:59:54,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:59:54,381 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:54,381 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 379 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:59:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2025-03-03 13:59:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 512. [2025-03-03 13:59:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 337 states have (on average 1.2017804154302671) internal successors, (405), 359 states have internal predecessors, (405), 114 states have call successors, (114), 60 states have call predecessors, (114), 60 states have return successors, (110), 92 states have call predecessors, (110), 110 states have call successors, (110) [2025-03-03 13:59:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 629 transitions. [2025-03-03 13:59:54,453 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 629 transitions. Word has length 103 [2025-03-03 13:59:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:54,453 INFO L471 AbstractCegarLoop]: Abstraction has 512 states and 629 transitions. [2025-03-03 13:59:54,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2025-03-03 13:59:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 629 transitions. [2025-03-03 13:59:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2025-03-03 13:59:54,456 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:54,456 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:54,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 13:59:54,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:54,660 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:54,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1814396673, now seen corresponding path program 2 times [2025-03-03 13:59:54,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:54,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117135142] [2025-03-03 13:59:54,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:59:54,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:54,664 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-03 13:59:54,673 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 13:59:54,673 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:59:54,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-03-03 13:59:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:54,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117135142] [2025-03-03 13:59:54,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117135142] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:54,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842667638] [2025-03-03 13:59:54,991 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:59:54,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:54,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:54,993 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:54,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:59:55,018 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-03 13:59:55,038 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 13:59:55,039 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:59:55,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:55,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-03 13:59:55,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2025-03-03 13:59:55,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2025-03-03 13:59:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842667638] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:56,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:59:56,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 27 [2025-03-03 13:59:56,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314631517] [2025-03-03 13:59:56,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:56,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 13:59:56,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:56,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 13:59:56,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:59:56,011 INFO L87 Difference]: Start difference. First operand 512 states and 629 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 24 states have internal predecessors, (77), 17 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 17 states have call predecessors, (45), 17 states have call successors, (45) [2025-03-03 13:59:56,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:56,522 INFO L93 Difference]: Finished difference Result 539 states and 669 transitions. [2025-03-03 13:59:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:59:56,523 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 24 states have internal predecessors, (77), 17 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 17 states have call predecessors, (45), 17 states have call successors, (45) Word has length 108 [2025-03-03 13:59:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:56,525 INFO L225 Difference]: With dead ends: 539 [2025-03-03 13:59:56,525 INFO L226 Difference]: Without dead ends: 483 [2025-03-03 13:59:56,525 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:59:56,526 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 65 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:56,526 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 384 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:59:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2025-03-03 13:59:56,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 468. [2025-03-03 13:59:56,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 306 states have (on average 1.2156862745098038) internal successors, (372), 327 states have internal predecessors, (372), 107 states have call successors, (107), 54 states have call predecessors, (107), 54 states have return successors, (103), 86 states have call predecessors, (103), 103 states have call successors, (103) [2025-03-03 13:59:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 582 transitions. [2025-03-03 13:59:56,601 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 582 transitions. Word has length 108 [2025-03-03 13:59:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:56,603 INFO L471 AbstractCegarLoop]: Abstraction has 468 states and 582 transitions. [2025-03-03 13:59:56,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 24 states have internal predecessors, (77), 17 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 17 states have call predecessors, (45), 17 states have call successors, (45) [2025-03-03 13:59:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 582 transitions. [2025-03-03 13:59:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-03-03 13:59:56,605 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:56,605 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:56,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:56,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:56,806 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:56,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:56,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1472266516, now seen corresponding path program 1 times [2025-03-03 13:59:56,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:56,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182580395] [2025-03-03 13:59:56,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:56,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:56,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-03-03 13:59:56,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-03-03 13:59:56,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:56,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-03-03 13:59:56,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:56,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182580395] [2025-03-03 13:59:56,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182580395] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:56,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863682879] [2025-03-03 13:59:56,946 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:59:56,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:56,948 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:56,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:59:56,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-03-03 13:59:56,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-03-03 13:59:56,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:59:56,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:56,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-03 13:59:56,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-03-03 13:59:57,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-03-03 13:59:57,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863682879] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:57,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:59:57,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 14 [2025-03-03 13:59:57,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877837233] [2025-03-03 13:59:57,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:57,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:59:57,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:57,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:59:57,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:59:57,205 INFO L87 Difference]: Start difference. First operand 468 states and 582 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2025-03-03 13:59:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:57,417 INFO L93 Difference]: Finished difference Result 525 states and 649 transitions. [2025-03-03 13:59:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 13:59:57,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) Word has length 110 [2025-03-03 13:59:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:57,419 INFO L225 Difference]: With dead ends: 525 [2025-03-03 13:59:57,419 INFO L226 Difference]: Without dead ends: 479 [2025-03-03 13:59:57,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 212 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:59:57,420 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 74 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:57,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 181 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:59:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2025-03-03 13:59:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 473. [2025-03-03 13:59:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 317 states have (on average 1.160883280757098) internal successors, (368), 333 states have internal predecessors, (368), 104 states have call successors, (104), 51 states have call predecessors, (104), 51 states have return successors, (100), 88 states have call predecessors, (100), 100 states have call successors, (100) [2025-03-03 13:59:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 572 transitions. [2025-03-03 13:59:57,484 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 572 transitions. Word has length 110 [2025-03-03 13:59:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:57,485 INFO L471 AbstractCegarLoop]: Abstraction has 473 states and 572 transitions. [2025-03-03 13:59:57,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2025-03-03 13:59:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 572 transitions. [2025-03-03 13:59:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-03-03 13:59:57,486 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:57,486 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:57,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:57,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:57,686 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:57,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:57,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1996723121, now seen corresponding path program 3 times [2025-03-03 13:59:57,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:57,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917843251] [2025-03-03 13:59:57,687 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:59:57,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:57,690 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 121 statements into 10 equivalence classes. [2025-03-03 13:59:57,702 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 103 of 121 statements. [2025-03-03 13:59:57,702 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 13:59:57,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 54 proven. 34 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2025-03-03 13:59:57,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:59:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917843251] [2025-03-03 13:59:57,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917843251] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:59:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702297139] [2025-03-03 13:59:57,816 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:59:57,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:57,819 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:57,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 13:59:57,844 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 121 statements into 10 equivalence classes. [2025-03-03 13:59:57,861 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 69 of 121 statements. [2025-03-03 13:59:57,861 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:59:57,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:57,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-03 13:59:57,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 148 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2025-03-03 13:59:58,000 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:59:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2025-03-03 13:59:58,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702297139] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:59:58,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:59:58,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 20 [2025-03-03 13:59:58,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984079448] [2025-03-03 13:59:58,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:59:58,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 13:59:58,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:59:58,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 13:59:58,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:59:58,133 INFO L87 Difference]: Start difference. First operand 473 states and 572 transitions. Second operand has 20 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 12 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-03 13:59:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:59:58,929 INFO L93 Difference]: Finished difference Result 567 states and 680 transitions. [2025-03-03 13:59:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 13:59:58,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 12 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) Word has length 121 [2025-03-03 13:59:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:59:58,931 INFO L225 Difference]: With dead ends: 567 [2025-03-03 13:59:58,931 INFO L226 Difference]: Without dead ends: 536 [2025-03-03 13:59:58,932 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 13:59:58,933 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 97 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:59:58,933 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 482 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:59:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2025-03-03 13:59:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 501. [2025-03-03 13:59:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 343 states have (on average 1.131195335276968) internal successors, (388), 350 states have internal predecessors, (388), 98 states have call successors, (98), 59 states have call predecessors, (98), 59 states have return successors, (95), 91 states have call predecessors, (95), 95 states have call successors, (95) [2025-03-03 13:59:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 581 transitions. [2025-03-03 13:59:59,004 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 581 transitions. Word has length 121 [2025-03-03 13:59:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:59:59,004 INFO L471 AbstractCegarLoop]: Abstraction has 501 states and 581 transitions. [2025-03-03 13:59:59,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 12 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-03 13:59:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 581 transitions. [2025-03-03 13:59:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-03-03 13:59:59,005 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:59:59,006 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:59:59,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-03 13:59:59,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:59,206 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:59:59,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:59:59,206 INFO L85 PathProgramCache]: Analyzing trace with hash 951961348, now seen corresponding path program 4 times [2025-03-03 13:59:59,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:59:59,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976498110] [2025-03-03 13:59:59,207 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:59:59,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:59:59,211 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 124 statements into 2 equivalence classes. [2025-03-03 13:59:59,235 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-03 13:59:59,236 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:59:59,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:59:59,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143321848] [2025-03-03 13:59:59,237 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:59:59,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:59:59,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:59:59,239 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:59:59,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 13:59:59,266 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 124 statements into 2 equivalence classes. [2025-03-03 13:59:59,300 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-03 13:59:59,300 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:59:59,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:59:59,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-03 13:59:59,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:59:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 62 proven. 88 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2025-03-03 13:59:59,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:00:57,337 WARN L286 SmtUtils]: Spent 6.40s on a formula simplification that was a NOOP. DAG size: 379 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)