./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound1.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/cohencu-ll_valuebound1.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 1009b309b84d3a678e4f12db10e873a2b96e065352111c00074b04d416cca18d --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:44:20,615 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:44:20,666 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:44:20,670 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:44:20,670 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:44:20,692 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:44:20,693 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:44:20,693 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:44:20,693 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:44:20,693 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:44:20,693 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:44:20,693 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:44:20,694 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:44:20,694 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:44:20,694 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:44:20,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:44:20,694 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:44:20,694 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:44:20,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:44:20,695 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:44:20,695 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:44:20,696 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:44:20,696 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:44:20,697 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 -> 1009b309b84d3a678e4f12db10e873a2b96e065352111c00074b04d416cca18d [2025-03-03 13:44:20,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:44:20,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:44:20,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:44:20,943 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:44:20,944 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:44:20,945 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound1.c [2025-03-03 13:44:22,081 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee44f0f64/16ccecbd346146f6a6201c399edd4f7b/FLAG29d7d60c7 [2025-03-03 13:44:22,278 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:44:22,279 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound1.c [2025-03-03 13:44:22,285 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee44f0f64/16ccecbd346146f6a6201c399edd4f7b/FLAG29d7d60c7 [2025-03-03 13:44:22,645 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee44f0f64/16ccecbd346146f6a6201c399edd4f7b [2025-03-03 13:44:22,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:44:22,648 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:44:22,649 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:44:22,649 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:44:22,652 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:44:22,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a8cc25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22, skipping insertion in model container [2025-03-03 13:44:22,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,662 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:44:22,745 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/cohencu-ll_valuebound1.c[588,601] [2025-03-03 13:44:22,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:44:22,763 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:44:22,769 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/cohencu-ll_valuebound1.c[588,601] [2025-03-03 13:44:22,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:44:22,788 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:44:22,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22 WrapperNode [2025-03-03 13:44:22,790 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:44:22,791 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:44:22,791 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:44:22,791 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:44:22,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,815 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2025-03-03 13:44:22,815 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:44:22,816 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:44:22,816 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:44:22,816 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:44:22,821 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,822 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,829 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 13:44:22,830 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,832 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,832 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,832 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,833 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:44:22,834 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:44:22,834 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:44:22,834 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:44:22,835 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (1/1) ... [2025-03-03 13:44:22,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:44:22,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:22,855 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 13:44:22,857 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 13:44:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:44:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:44:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:44:22,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:44:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:44:22,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:44:22,914 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:44:22,916 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:44:23,035 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 13:44:23,035 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:44:23,042 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:44:23,042 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:44:23,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:44:23 BoogieIcfgContainer [2025-03-03 13:44:23,043 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:44:23,046 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:44:23,046 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:44:23,050 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:44:23,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:44:22" (1/3) ... [2025-03-03 13:44:23,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574a2809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:44:23, skipping insertion in model container [2025-03-03 13:44:23,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:22" (2/3) ... [2025-03-03 13:44:23,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574a2809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:44:23, skipping insertion in model container [2025-03-03 13:44:23,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:44:23" (3/3) ... [2025-03-03 13:44:23,054 INFO L128 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound1.c [2025-03-03 13:44:23,066 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:44:23,068 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG cohencu-ll_valuebound1.c that has 2 procedures, 26 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-03 13:44:23,113 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:44:23,124 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;@696a4c88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:44:23,124 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:44:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-03 13:44:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 13:44:23,133 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:23,134 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:23,134 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:23,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:23,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1735599928, now seen corresponding path program 1 times [2025-03-03 13:44:23,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:23,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504834447] [2025-03-03 13:44:23,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:23,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:23,199 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 13:44:23,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 13:44:23,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:23,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:23,242 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 13:44:23,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:23,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504834447] [2025-03-03 13:44:23,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504834447] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:44:23,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:44:23,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-03 13:44:23,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693716450] [2025-03-03 13:44:23,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:44:23,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 13:44:23,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:23,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 13:44:23,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:44:23,259 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:44:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:23,271 INFO L93 Difference]: Finished difference Result 49 states and 85 transitions. [2025-03-03 13:44:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 13:44:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-03 13:44:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:23,277 INFO L225 Difference]: With dead ends: 49 [2025-03-03 13:44:23,277 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 13:44:23,280 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 13:44:23,282 INFO L435 NwaCegarLoop]: 36 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, 36 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 13:44:23,282 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:44:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 13:44:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-03-03 13:44:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 13:44:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2025-03-03 13:44:23,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2025-03-03 13:44:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:23,307 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2025-03-03 13:44:23,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:44:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2025-03-03 13:44:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 13:44:23,307 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:23,307 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:23,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 13:44:23,308 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:23,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:23,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1706970777, now seen corresponding path program 1 times [2025-03-03 13:44:23,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:23,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338074417] [2025-03-03 13:44:23,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:23,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:23,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 13:44:23,326 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 13:44:23,326 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:23,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:23,479 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 13:44:23,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338074417] [2025-03-03 13:44:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338074417] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:44:23,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:44:23,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:44:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076335935] [2025-03-03 13:44:23,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:44:23,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:44:23,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:23,483 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:44:23,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:44:23,483 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:44:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:23,569 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2025-03-03 13:44:23,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:44:23,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-03 13:44:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:23,570 INFO L225 Difference]: With dead ends: 28 [2025-03-03 13:44:23,570 INFO L226 Difference]: Without dead ends: 26 [2025-03-03 13:44:23,570 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 13:44:23,571 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:23,571 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:44:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-03 13:44:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-03 13:44:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 13:44:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2025-03-03 13:44:23,578 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2025-03-03 13:44:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:23,578 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2025-03-03 13:44:23,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:44:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2025-03-03 13:44:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-03 13:44:23,579 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:23,579 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:23,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 13:44:23,579 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:23,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1634389675, now seen corresponding path program 1 times [2025-03-03 13:44:23,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:23,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966338342] [2025-03-03 13:44:23,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:23,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:23,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:44:23,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:44:23,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:23,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:23,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152216449] [2025-03-03 13:44:23,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:23,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:23,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:23,610 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 13:44:23,611 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 13:44:23,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:44:23,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:44:23,655 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:23,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:23,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:44:23,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:23,715 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 13:44:23,715 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:44:23,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:23,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966338342] [2025-03-03 13:44:23,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:23,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152216449] [2025-03-03 13:44:23,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152216449] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:44:23,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:44:23,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:44:23,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841244957] [2025-03-03 13:44:23,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:44:23,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:44:23,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:23,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:44:23,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:44:23,718 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13:44:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:23,764 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2025-03-03 13:44:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:44:23,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2025-03-03 13:44:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:23,765 INFO L225 Difference]: With dead ends: 44 [2025-03-03 13:44:23,765 INFO L226 Difference]: Without dead ends: 42 [2025-03-03 13:44:23,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 13:44:23,766 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:23,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:44:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-03 13:44:23,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2025-03-03 13:44:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 13:44:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2025-03-03 13:44:23,775 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 13 [2025-03-03 13:44:23,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:23,775 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2025-03-03 13:44:23,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13:44:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2025-03-03 13:44:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-03 13:44:23,776 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:23,776 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:23,782 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 13:44:23,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:23,977 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:23,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:23,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1549967769, now seen corresponding path program 1 times [2025-03-03 13:44:23,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:23,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807386344] [2025-03-03 13:44:23,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:23,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:23,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-03 13:44:23,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:44:23,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:23,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:23,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848334757] [2025-03-03 13:44:23,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:23,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:23,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:24,001 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 13:44:24,002 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 13:44:24,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-03 13:44:24,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:44:24,042 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:24,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:24,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:44:24,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:24,081 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 13:44:24,081 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:44:24,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:24,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807386344] [2025-03-03 13:44:24,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:24,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848334757] [2025-03-03 13:44:24,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848334757] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:44:24,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:44:24,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:44:24,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732950028] [2025-03-03 13:44:24,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:44:24,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:44:24,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:24,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:44:24,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:44:24,083 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13:44:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:24,155 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2025-03-03 13:44:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:44:24,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 18 [2025-03-03 13:44:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:24,156 INFO L225 Difference]: With dead ends: 48 [2025-03-03 13:44:24,156 INFO L226 Difference]: Without dead ends: 46 [2025-03-03 13:44:24,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 13:44:24,157 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:24,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:44:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-03 13:44:24,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2025-03-03 13:44:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-03 13:44:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2025-03-03 13:44:24,175 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 18 [2025-03-03 13:44:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:24,175 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2025-03-03 13:44:24,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13:44:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2025-03-03 13:44:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 13:44:24,175 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:24,175 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:24,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 13:44:24,376 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,SelfDestructingSolverStorable3 [2025-03-03 13:44:24,376 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:24,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:24,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1816360149, now seen corresponding path program 1 times [2025-03-03 13:44:24,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:24,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214294139] [2025-03-03 13:44:24,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:24,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:24,382 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 13:44:24,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 13:44:24,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:24,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:24,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676291466] [2025-03-03 13:44:24,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:24,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:24,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:24,405 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 13:44:24,407 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 13:44:24,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 13:44:24,443 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 13:44:24,443 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:24,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:24,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:44:24,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 13:44:24,511 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:44:24,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:24,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214294139] [2025-03-03 13:44:24,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:24,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676291466] [2025-03-03 13:44:24,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676291466] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:44:24,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:44:24,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:44:24,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814319476] [2025-03-03 13:44:24,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:44:24,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:44:24,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:24,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:44:24,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:44:24,512 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13:44:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:24,588 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2025-03-03 13:44:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:44:24,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 23 [2025-03-03 13:44:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:24,589 INFO L225 Difference]: With dead ends: 56 [2025-03-03 13:44:24,589 INFO L226 Difference]: Without dead ends: 44 [2025-03-03 13:44:24,589 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 13:44:24,590 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:24,590 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:44:24,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-03 13:44:24,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2025-03-03 13:44:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-03 13:44:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2025-03-03 13:44:24,597 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 23 [2025-03-03 13:44:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:24,597 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2025-03-03 13:44:24,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13:44:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2025-03-03 13:44:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 13:44:24,598 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:24,598 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:24,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 13:44:24,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:24,804 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:24,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:24,804 INFO L85 PathProgramCache]: Analyzing trace with hash 788053417, now seen corresponding path program 1 times [2025-03-03 13:44:24,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:24,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143404349] [2025-03-03 13:44:24,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:24,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:24,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:44:24,829 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:44:24,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:24,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:24,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377145320] [2025-03-03 13:44:24,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:24,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:24,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:24,836 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 13:44:24,840 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 13:44:24,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:44:24,882 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:44:24,882 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:24,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:24,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-03 13:44:24,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:44:25,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:44:25,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:25,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143404349] [2025-03-03 13:44:25,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:25,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377145320] [2025-03-03 13:44:25,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377145320] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:25,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:25,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-03-03 13:44:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235088508] [2025-03-03 13:44:25,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:25,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 13:44:25,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:25,135 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 13:44:25,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:44:25,136 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-03 13:44:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:25,361 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2025-03-03 13:44:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:44:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 39 [2025-03-03 13:44:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:25,362 INFO L225 Difference]: With dead ends: 66 [2025-03-03 13:44:25,363 INFO L226 Difference]: Without dead ends: 64 [2025-03-03 13:44:25,363 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-03-03 13:44:25,364 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:25,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:44:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-03 13:44:25,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2025-03-03 13:44:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-03 13:44:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2025-03-03 13:44:25,382 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 39 [2025-03-03 13:44:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:25,382 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2025-03-03 13:44:25,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-03 13:44:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2025-03-03 13:44:25,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-03 13:44:25,383 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:25,383 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:25,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 13:44:25,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:25,584 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:25,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:25,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1323853459, now seen corresponding path program 2 times [2025-03-03 13:44:25,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:25,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112030652] [2025-03-03 13:44:25,585 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:44:25,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:25,593 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-03 13:44:25,608 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:44:25,608 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:44:25,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:25,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432163700] [2025-03-03 13:44:25,609 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:44:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:25,611 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 13:44:25,613 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 13:44:25,640 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-03 13:44:25,655 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:44:25,656 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:44:25,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:25,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-03 13:44:25,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-03 13:44:25,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-03 13:44:25,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112030652] [2025-03-03 13:44:25,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432163700] [2025-03-03 13:44:25,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432163700] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:25,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:25,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2025-03-03 13:44:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762426533] [2025-03-03 13:44:25,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:25,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:44:25,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:25,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:44:25,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:44:25,954 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 14 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-03 13:44:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:26,190 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2025-03-03 13:44:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 13:44:26,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 44 [2025-03-03 13:44:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:26,192 INFO L225 Difference]: With dead ends: 79 [2025-03-03 13:44:26,192 INFO L226 Difference]: Without dead ends: 74 [2025-03-03 13:44:26,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:44:26,193 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:26,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:44:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-03-03 13:44:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2025-03-03 13:44:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-03 13:44:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2025-03-03 13:44:26,220 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 44 [2025-03-03 13:44:26,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:26,220 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2025-03-03 13:44:26,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-03 13:44:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2025-03-03 13:44:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-03 13:44:26,222 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:26,222 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:26,228 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 13:44:26,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:26,423 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:26,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:26,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1450305035, now seen corresponding path program 1 times [2025-03-03 13:44:26,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:26,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051154117] [2025-03-03 13:44:26,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:26,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:26,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-03 13:44:26,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 13:44:26,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:26,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:26,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553792348] [2025-03-03 13:44:26,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:26,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:26,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:26,461 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 13:44:26,465 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 13:44:26,497 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-03 13:44:26,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 13:44:26,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:26,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:26,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 13:44:26,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 13:44:26,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 13:44:26,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:26,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051154117] [2025-03-03 13:44:26,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:26,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553792348] [2025-03-03 13:44:26,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553792348] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:26,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:26,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-03 13:44:26,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369083768] [2025-03-03 13:44:26,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:26,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:44:26,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:26,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:44:26,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:44:26,784 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2025-03-03 13:44:27,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:27,010 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2025-03-03 13:44:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:44:27,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 65 [2025-03-03 13:44:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:27,013 INFO L225 Difference]: With dead ends: 99 [2025-03-03 13:44:27,013 INFO L226 Difference]: Without dead ends: 97 [2025-03-03 13:44:27,014 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:44:27,015 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:27,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 192 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:44:27,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-03-03 13:44:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2025-03-03 13:44:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 51 states have internal predecessors, (52), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2025-03-03 13:44:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2025-03-03 13:44:27,040 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 65 [2025-03-03 13:44:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:27,040 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2025-03-03 13:44:27,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2025-03-03 13:44:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2025-03-03 13:44:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-03 13:44:27,043 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:27,043 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 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 13:44:27,049 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 13:44:27,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:27,244 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:27,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1469357305, now seen corresponding path program 1 times [2025-03-03 13:44:27,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:27,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342271722] [2025-03-03 13:44:27,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:27,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:27,248 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-03 13:44:27,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-03 13:44:27,263 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:27,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:27,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006403534] [2025-03-03 13:44:27,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:27,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:27,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:27,267 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 13:44:27,269 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 13:44:27,297 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-03 13:44:27,313 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-03 13:44:27,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:27,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:27,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-03 13:44:27,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-03-03 13:44:27,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-03-03 13:44:27,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:27,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342271722] [2025-03-03 13:44:27,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:27,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006403534] [2025-03-03 13:44:27,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006403534] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:27,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:27,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-03 13:44:27,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167160648] [2025-03-03 13:44:27,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:27,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:44:27,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:27,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:44:27,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:44:27,586 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2025-03-03 13:44:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:27,939 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2025-03-03 13:44:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:44:27,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 70 [2025-03-03 13:44:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:27,940 INFO L225 Difference]: With dead ends: 119 [2025-03-03 13:44:27,940 INFO L226 Difference]: Without dead ends: 110 [2025-03-03 13:44:27,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:44:27,941 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:27,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 164 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:44:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-03 13:44:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2025-03-03 13:44:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 55 states have internal predecessors, (56), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2025-03-03 13:44:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2025-03-03 13:44:27,969 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 70 [2025-03-03 13:44:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:27,969 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2025-03-03 13:44:27,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2025-03-03 13:44:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2025-03-03 13:44:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-03 13:44:27,969 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:27,970 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:27,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 13:44:28,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:28,171 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:28,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:28,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1622041987, now seen corresponding path program 3 times [2025-03-03 13:44:28,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:28,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933793269] [2025-03-03 13:44:28,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:44:28,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:28,177 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 11 equivalence classes. [2025-03-03 13:44:28,213 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 75 of 75 statements. [2025-03-03 13:44:28,213 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 13:44:28,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:28,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250239251] [2025-03-03 13:44:28,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:44:28,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:28,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:28,217 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 13:44:28,220 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 13:44:28,245 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 11 equivalence classes. [2025-03-03 13:44:28,289 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 29 of 75 statements. [2025-03-03 13:44:28,290 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:44:28,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:28,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-03 13:44:28,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 116 proven. 9 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2025-03-03 13:44:36,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 116 proven. 9 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2025-03-03 13:44:46,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:46,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933793269] [2025-03-03 13:44:46,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:46,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250239251] [2025-03-03 13:44:46,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250239251] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:46,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:46,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2025-03-03 13:44:46,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114920474] [2025-03-03 13:44:46,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:46,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:44:46,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:46,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:44:46,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2025-03-03 13:44:46,934 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 15 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2025-03-03 13:44:48,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:44:52,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:44:56,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:00,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:04,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:06,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:07,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:11,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:17,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:19,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:23,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:27,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:30,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:32,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:45:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:45:33,988 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2025-03-03 13:45:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:45:33,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 75 [2025-03-03 13:45:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:45:33,990 INFO L225 Difference]: With dead ends: 109 [2025-03-03 13:45:33,990 INFO L226 Difference]: Without dead ends: 93 [2025-03-03 13:45:33,990 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=60, Invalid=211, Unknown=1, NotChecked=0, Total=272 [2025-03-03 13:45:33,990 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 51 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:45:33,991 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 116 Invalid, 7 Unknown, 0 Unchecked, 42.2s Time] [2025-03-03 13:45:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-03 13:45:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-03-03 13:45:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2025-03-03 13:45:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2025-03-03 13:45:34,014 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 75 [2025-03-03 13:45:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:45:34,014 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2025-03-03 13:45:34,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2025-03-03 13:45:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2025-03-03 13:45:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-03-03 13:45:34,015 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:45:34,015 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:45:34,022 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 13:45:34,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 13:45:34,220 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:45:34,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:45:34,220 INFO L85 PathProgramCache]: Analyzing trace with hash 319729053, now seen corresponding path program 2 times [2025-03-03 13:45:34,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:45:34,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067514221] [2025-03-03 13:45:34,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:45:34,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:45:34,225 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-03-03 13:45:34,243 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-03-03 13:45:34,244 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:45:34,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:45:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 66 proven. 12 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2025-03-03 13:45:34,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:45:34,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067514221] [2025-03-03 13:45:34,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067514221] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:45:34,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582955160] [2025-03-03 13:45:34,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:45:34,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:45:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:45:34,471 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 13:45:34,473 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 13:45:34,503 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-03-03 13:45:34,528 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-03-03 13:45:34,528 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:45:34,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:45:34,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:45:34,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:45:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2025-03-03 13:45:34,688 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:45:34,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582955160] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:45:34,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:45:34,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2025-03-03 13:45:34,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527138044] [2025-03-03 13:45:34,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:45:34,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:45:34,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:45:34,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:45:34,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:45:34,689 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2025-03-03 13:45:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:45:34,744 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2025-03-03 13:45:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:45:34,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 117 [2025-03-03 13:45:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:45:34,746 INFO L225 Difference]: With dead ends: 109 [2025-03-03 13:45:34,746 INFO L226 Difference]: Without dead ends: 0 [2025-03-03 13:45:34,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:45:34,747 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:45:34,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 93 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:45:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-03 13:45:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-03 13:45:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:45:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-03 13:45:34,747 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 117 [2025-03-03 13:45:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:45:34,747 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-03 13:45:34,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2025-03-03 13:45:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-03 13:45:34,748 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-03 13:45:34,751 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-03 13:45:34,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 13:45:34,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:45:34,954 INFO L422 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2025-03-03 13:45:34,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-03 13:45:41,564 WARN L286 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 83 DAG size of output: 28 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2025-03-03 13:45:47,698 WARN L286 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 78 DAG size of output: 39 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2025-03-03 13:45:53,336 WARN L286 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 83 DAG size of output: 28 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter)