./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 735b3cc8 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/pthread/fib_safe-12.i -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 e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 00:42:44,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 00:42:44,940 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 00:42:44,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 00:42:44,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 00:42:44,959 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 00:42:44,960 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 00:42:44,960 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 00:42:44,960 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 00:42:44,960 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 00:42:44,960 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 00:42:44,960 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 00:42:44,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 00:42:44,961 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 00:42:44,961 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 00:42:44,961 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 00:42:44,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 00:42:44,961 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 00:42:44,961 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 00:42:44,961 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 00:42:44,961 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 00:42:44,961 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 00:42:44,961 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 00:42:44,961 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 00:42:44,962 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 00:42:44,962 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 00:42:44,962 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 00:42:44,962 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 00:42:44,962 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 00:42:44,962 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 00:42:44,962 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 00:42:44,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 00:42:44,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 00:42:44,962 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 00:42:44,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 00:42:44,963 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 00:42:44,963 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 00:42:44,963 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 00:42:44,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 00:42:44,963 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 00:42:44,963 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 00:42:44,963 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 00:42:44,963 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 00:42:44,963 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 -> e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 [2025-03-14 00:42:45,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 00:42:45,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 00:42:45,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 00:42:45,186 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 00:42:45,186 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 00:42:45,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-12.i [2025-03-14 00:42:46,273 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a23301917/d6774dc574684156ac2e9a4a4689597b/FLAG99cfe0e2c [2025-03-14 00:42:46,558 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 00:42:46,558 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-12.i [2025-03-14 00:42:46,576 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a23301917/d6774dc574684156ac2e9a4a4689597b/FLAG99cfe0e2c [2025-03-14 00:42:46,590 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a23301917/d6774dc574684156ac2e9a4a4689597b [2025-03-14 00:42:46,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 00:42:46,593 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 00:42:46,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 00:42:46,595 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 00:42:46,598 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 00:42:46,599 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,600 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167461fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46, skipping insertion in model container [2025-03-14 00:42:46,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,630 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 00:42:46,814 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/pthread/fib_safe-12.i[30241,30254] [2025-03-14 00:42:46,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 00:42:46,831 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 00:42:46,852 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/pthread/fib_safe-12.i[30241,30254] [2025-03-14 00:42:46,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 00:42:46,886 INFO L204 MainTranslator]: Completed translation [2025-03-14 00:42:46,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46 WrapperNode [2025-03-14 00:42:46,886 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 00:42:46,887 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 00:42:46,887 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 00:42:46,887 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 00:42:46,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,910 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-03-14 00:42:46,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 00:42:46,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 00:42:46,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 00:42:46,911 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 00:42:46,916 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,917 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,930 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]. [2025-03-14 00:42:46,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,930 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,933 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,934 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 00:42:46,936 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 00:42:46,936 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 00:42:46,936 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 00:42:46,938 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 00:42:46,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:46,964 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) [2025-03-14 00:42:46,968 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 [2025-03-14 00:42:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-14 00:42:46,983 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-14 00:42:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-14 00:42:46,983 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-14 00:42:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-14 00:42:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 00:42:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 00:42:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-14 00:42:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 00:42:46,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 00:42:46,985 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 00:42:47,061 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 00:42:47,062 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 00:42:47,178 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 00:42:47,179 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 00:42:47,179 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 00:42:47,259 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 00:42:47,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 12:42:47 BoogieIcfgContainer [2025-03-14 00:42:47,260 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 00:42:47,263 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 00:42:47,264 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 00:42:47,267 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 00:42:47,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 12:42:46" (1/3) ... [2025-03-14 00:42:47,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61780fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 12:42:47, skipping insertion in model container [2025-03-14 00:42:47,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (2/3) ... [2025-03-14 00:42:47,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61780fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 12:42:47, skipping insertion in model container [2025-03-14 00:42:47,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 12:42:47" (3/3) ... [2025-03-14 00:42:47,269 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2025-03-14 00:42:47,281 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 00:42:47,283 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-12.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-14 00:42:47,283 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 00:42:47,317 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-14 00:42:47,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-03-14 00:42:47,366 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-03-14 00:42:47,368 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-14 00:42:47,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-03-14 00:42:47,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-03-14 00:42:47,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-03-14 00:42:47,384 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 00:42:47,397 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;@c14b1f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 00:42:47,397 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-14 00:42:47,403 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 00:42:47,403 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-03-14 00:42:47,403 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-14 00:42:47,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:47,404 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:47,404 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:47,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash -411636505, now seen corresponding path program 1 times [2025-03-14 00:42:47,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:47,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262450642] [2025-03-14 00:42:47,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:42:47,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:47,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-14 00:42:47,501 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-14 00:42:47,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:42:47,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:47,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:47,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262450642] [2025-03-14 00:42:47,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262450642] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 00:42:47,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 00:42:47,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 00:42:47,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878484052] [2025-03-14 00:42:47,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 00:42:47,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 00:42:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:47,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 00:42:47,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 00:42:47,633 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:47,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-03-14 00:42:47,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:47,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:47,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:47,755 INFO L124 PetriNetUnfolderBase]: 233/410 cut-off events. [2025-03-14 00:42:47,757 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-14 00:42:47,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 410 events. 233/410 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1576 event pairs, 39 based on Foata normal form. 16/389 useless extension candidates. Maximal degree in co-relation 765. Up to 257 conditions per place. [2025-03-14 00:42:47,761 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-03-14 00:42:47,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-03-14 00:42:47,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 00:42:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 00:42:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-14 00:42:47,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-14 00:42:47,776 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-03-14 00:42:47,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-03-14 00:42:47,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-14 00:42:47,782 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-03-14 00:42:47,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2025-03-14 00:42:47,789 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-14 00:42:47,790 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-03-14 00:42:47,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-03-14 00:42:47,790 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:47,791 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:47,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 00:42:47,791 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:47,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:47,792 INFO L85 PathProgramCache]: Analyzing trace with hash 75573994, now seen corresponding path program 1 times [2025-03-14 00:42:47,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:47,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994436376] [2025-03-14 00:42:47,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:42:47,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:47,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-14 00:42:47,817 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-14 00:42:47,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:42:47,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:47,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:47,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994436376] [2025-03-14 00:42:47,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994436376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:47,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448895491] [2025-03-14 00:42:47,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:42:47,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:47,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:47,897 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) [2025-03-14 00:42:47,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 00:42:47,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-14 00:42:47,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-14 00:42:47,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:42:47,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:47,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-14 00:42:47,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:47,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448895491] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:48,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:48,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-14 00:42:48,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744646135] [2025-03-14 00:42:48,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:48,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 00:42:48,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:48,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 00:42:48,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-14 00:42:48,012 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:48,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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) [2025-03-14 00:42:48,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:48,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:48,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:48,168 INFO L124 PetriNetUnfolderBase]: 297/506 cut-off events. [2025-03-14 00:42:48,168 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-14 00:42:48,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 506 events. 297/506 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1880 event pairs, 39 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1069. Up to 209 conditions per place. [2025-03-14 00:42:48,175 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-14 00:42:48,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-03-14 00:42:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 00:42:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 00:42:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-03-14 00:42:48,178 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-03-14 00:42:48,178 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-03-14 00:42:48,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-03-14 00:42:48,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 00:42:48,180 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-03-14 00:42:48,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2025-03-14 00:42:48,180 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-03-14 00:42:48,180 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-03-14 00:42:48,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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) [2025-03-14 00:42:48,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:48,181 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:48,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-14 00:42:48,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:48,385 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:48,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:48,386 INFO L85 PathProgramCache]: Analyzing trace with hash -149432921, now seen corresponding path program 2 times [2025-03-14 00:42:48,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:48,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079500152] [2025-03-14 00:42:48,386 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 00:42:48,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:48,396 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-14 00:42:48,422 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-14 00:42:48,425 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 00:42:48,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:48,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079500152] [2025-03-14 00:42:48,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079500152] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:48,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94232312] [2025-03-14 00:42:48,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 00:42:48,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:48,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:48,539 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) [2025-03-14 00:42:48,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 00:42:48,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-14 00:42:48,595 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-14 00:42:48,595 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 00:42:48,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:48,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 00:42:48,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94232312] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:48,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:48,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-14 00:42:48,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734488072] [2025-03-14 00:42:48,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:48,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-14 00:42:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:48,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-14 00:42:48,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-14 00:42:48,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:48,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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) [2025-03-14 00:42:48,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:48,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:48,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:48,829 INFO L124 PetriNetUnfolderBase]: 489/794 cut-off events. [2025-03-14 00:42:48,829 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-14 00:42:48,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 794 events. 489/794 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2900 event pairs, 39 based on Foata normal form. 96/869 useless extension candidates. Maximal degree in co-relation 1997. Up to 209 conditions per place. [2025-03-14 00:42:48,834 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-03-14 00:42:48,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-03-14 00:42:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-14 00:42:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-14 00:42:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-03-14 00:42:48,835 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-03-14 00:42:48,835 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-03-14 00:42:48,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-03-14 00:42:48,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-14 00:42:48,840 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-03-14 00:42:48,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2025-03-14 00:42:48,841 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-03-14 00:42:48,841 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-03-14 00:42:48,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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) [2025-03-14 00:42:48,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:48,841 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:48,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-14 00:42:49,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-14 00:42:49,042 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:49,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1573371591, now seen corresponding path program 3 times [2025-03-14 00:42:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:49,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810990659] [2025-03-14 00:42:49,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 00:42:49,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:49,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-14 00:42:49,071 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 00:42:49,071 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-14 00:42:49,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:49,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810990659] [2025-03-14 00:42:49,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810990659] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:49,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091328718] [2025-03-14 00:42:49,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 00:42:49,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:49,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:49,256 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) [2025-03-14 00:42:49,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 00:42:49,294 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-14 00:42:49,317 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 00:42:49,317 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-14 00:42:49,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:49,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-14 00:42:49,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091328718] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:49,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:49,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-14 00:42:49,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525014511] [2025-03-14 00:42:49,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:49,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-14 00:42:49,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:49,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-14 00:42:49,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-14 00:42:49,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:49,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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) [2025-03-14 00:42:49,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:49,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:49,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:49,901 INFO L124 PetriNetUnfolderBase]: 873/1370 cut-off events. [2025-03-14 00:42:49,901 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-03-14 00:42:49,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4025 conditions, 1370 events. 873/1370 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4946 event pairs, 39 based on Foata normal form. 192/1541 useless extension candidates. Maximal degree in co-relation 3997. Up to 337 conditions per place. [2025-03-14 00:42:49,910 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 195 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2025-03-14 00:42:49,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 223 transitions, 1054 flow [2025-03-14 00:42:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-14 00:42:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-14 00:42:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 398 transitions. [2025-03-14 00:42:49,916 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5718390804597702 [2025-03-14 00:42:49,916 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 398 transitions. [2025-03-14 00:42:49,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 223 transitions, 1054 flow [2025-03-14 00:42:49,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 223 transitions, 982 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-03-14 00:42:49,929 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2025-03-14 00:42:49,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=290, PETRI_PLACES=83, PETRI_TRANSITIONS=47} [2025-03-14 00:42:49,931 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2025-03-14 00:42:49,931 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2025-03-14 00:42:49,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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) [2025-03-14 00:42:49,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:49,932 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:49,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-14 00:42:50,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:50,138 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:50,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:50,139 INFO L85 PathProgramCache]: Analyzing trace with hash -681080569, now seen corresponding path program 4 times [2025-03-14 00:42:50,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:50,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666483436] [2025-03-14 00:42:50,140 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 00:42:50,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:50,148 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-14 00:42:50,162 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-14 00:42:50,162 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 00:42:50,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:50,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:50,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666483436] [2025-03-14 00:42:50,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666483436] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:50,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875070960] [2025-03-14 00:42:50,565 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 00:42:50,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:50,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:50,568 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) [2025-03-14 00:42:50,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 00:42:50,609 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-14 00:42:50,633 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-14 00:42:50,634 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 00:42:50,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:50,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-14 00:42:50,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:50,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:51,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875070960] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:51,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:51,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2025-03-14 00:42:51,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821342366] [2025-03-14 00:42:51,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:51,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-14 00:42:51,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:51,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-14 00:42:51,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2025-03-14 00:42:51,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:51,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 47 transitions, 290 flow. Second operand has 28 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 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) [2025-03-14 00:42:51,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:51,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:51,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:51,405 INFO L124 PetriNetUnfolderBase]: 1001/1562 cut-off events. [2025-03-14 00:42:51,405 INFO L125 PetriNetUnfolderBase]: For 16588/16588 co-relation queries the response was YES. [2025-03-14 00:42:51,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 1562 events. 1001/1562 cut-off events. For 16588/16588 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5694 event pairs, 39 based on Foata normal form. 64/1605 useless extension candidates. Maximal degree in co-relation 4765. Up to 305 conditions per place. [2025-03-14 00:42:51,417 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 227 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2025-03-14 00:42:51,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 259 transitions, 1246 flow [2025-03-14 00:42:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-14 00:42:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-14 00:42:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 454 transitions. [2025-03-14 00:42:51,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5591133004926109 [2025-03-14 00:42:51,419 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 28 states and 454 transitions. [2025-03-14 00:42:51,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 259 transitions, 1246 flow [2025-03-14 00:42:51,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 259 transitions, 1142 flow, removed 41 selfloop flow, removed 11 redundant places. [2025-03-14 00:42:51,436 INFO L231 Difference]: Finished difference. Result has 103 places, 51 transitions, 290 flow [2025-03-14 00:42:51,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=51} [2025-03-14 00:42:51,437 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2025-03-14 00:42:51,437 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 51 transitions, 290 flow [2025-03-14 00:42:51,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 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) [2025-03-14 00:42:51,438 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:51,438 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:51,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-14 00:42:51,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:51,642 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:51,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash 119366087, now seen corresponding path program 5 times [2025-03-14 00:42:51,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:51,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637734535] [2025-03-14 00:42:51,643 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 00:42:51,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:51,651 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-03-14 00:42:51,740 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 00:42:51,741 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-14 00:42:51,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:53,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:53,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637734535] [2025-03-14 00:42:53,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637734535] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:53,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346708203] [2025-03-14 00:42:53,225 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 00:42:53,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:53,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:53,227 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) [2025-03-14 00:42:53,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 00:42:53,272 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-03-14 00:42:53,310 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 00:42:53,310 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-14 00:42:53,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:53,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-03-14 00:42:53,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:54,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:56,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346708203] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:56,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:56,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2025-03-14 00:42:56,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486625447] [2025-03-14 00:42:56,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:56,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2025-03-14 00:42:56,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:56,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2025-03-14 00:42:56,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1347, Invalid=8159, Unknown=0, NotChecked=0, Total=9506 [2025-03-14 00:42:56,552 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-14 00:42:56,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 51 transitions, 290 flow. Second operand has 98 states, 98 states have (on average 6.163265306122449) internal successors, (604), 98 states have internal predecessors, (604), 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) [2025-03-14 00:42:56,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:56,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-14 00:42:56,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:43:37,365 INFO L124 PetriNetUnfolderBase]: 41836/68765 cut-off events. [2025-03-14 00:43:37,365 INFO L125 PetriNetUnfolderBase]: For 264312/264312 co-relation queries the response was YES. [2025-03-14 00:43:37,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185804 conditions, 68765 events. 41836/68765 cut-off events. For 264312/264312 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 477836 event pairs, 711 based on Foata normal form. 0/68185 useless extension candidates. Maximal degree in co-relation 185760. Up to 8823 conditions per place. [2025-03-14 00:43:37,828 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 813 selfloop transitions, 1600 changer transitions 1229/3645 dead transitions. [2025-03-14 00:43:37,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 3645 transitions, 24931 flow [2025-03-14 00:43:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2025-03-14 00:43:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2025-03-14 00:43:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 3518 transitions. [2025-03-14 00:43:37,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4701951349906442 [2025-03-14 00:43:37,842 INFO L175 Difference]: Start difference. First operand has 103 places, 51 transitions, 290 flow. Second operand 258 states and 3518 transitions. [2025-03-14 00:43:37,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 3645 transitions, 24931 flow [2025-03-14 00:43:38,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 3645 transitions, 20893 flow, removed 754 selfloop flow, removed 23 redundant places. [2025-03-14 00:43:38,147 INFO L231 Difference]: Finished difference. Result has 455 places, 1752 transitions, 10812 flow [2025-03-14 00:43:38,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=258, PETRI_FLOW=10812, PETRI_PLACES=455, PETRI_TRANSITIONS=1752} [2025-03-14 00:43:38,148 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 425 predicate places. [2025-03-14 00:43:38,149 INFO L471 AbstractCegarLoop]: Abstraction has has 455 places, 1752 transitions, 10812 flow [2025-03-14 00:43:38,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 6.163265306122449) internal successors, (604), 98 states have internal predecessors, (604), 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) [2025-03-14 00:43:38,149 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:43:38,149 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:43:38,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-14 00:43:38,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:43:38,354 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:43:38,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:43:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash -62438523, now seen corresponding path program 1 times [2025-03-14 00:43:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:43:38,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195660704] [2025-03-14 00:43:38,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:43:38,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:43:38,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-14 00:43:38,386 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-14 00:43:38,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:43:38,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:43:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:43:39,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:43:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195660704] [2025-03-14 00:43:39,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195660704] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:43:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714246244] [2025-03-14 00:43:39,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:43:39,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:43:39,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:43:39,791 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) [2025-03-14 00:43:39,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-14 00:43:39,830 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-14 00:43:39,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-14 00:43:39,853 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:43:39,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:43:39,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-03-14 00:43:39,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:43:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 300 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:43:41,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:43:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:43:42,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714246244] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:43:42,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:43:42,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2025-03-14 00:43:42,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562342066] [2025-03-14 00:43:42,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:43:42,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2025-03-14 00:43:42,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:43:42,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2025-03-14 00:43:42,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1443, Invalid=9269, Unknown=0, NotChecked=0, Total=10712 [2025-03-14 00:43:42,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-14 00:43:42,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1752 transitions, 10812 flow. Second operand has 104 states, 104 states have (on average 6.211538461538462) internal successors, (646), 104 states have internal predecessors, (646), 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) [2025-03-14 00:43:42,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:43:42,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-14 00:43:42,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand