./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/fib_unsafe-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 0d5255e9cc8ffb776115e75fa8fa1fa6c2774a79275dfd8235c357288b00417c --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:10:55,863 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:10:55,909 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:10:55,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:10:55,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:10:55,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:10:55,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:10:55,932 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:10:55,932 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:10:55,932 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:10:55,932 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:10:55,932 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:10:55,932 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:10:55,932 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:10:55,932 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:10:55,932 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:10:55,933 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:10:55,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:10:55,933 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:10:55,934 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:10:55,934 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:10:55,934 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:10:55,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:10:55,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:10:55,934 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:10:55,934 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:10:55,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:10:55,934 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 -> 0d5255e9cc8ffb776115e75fa8fa1fa6c2774a79275dfd8235c357288b00417c [2025-03-08 17:10:56,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:10:56,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:10:56,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:10:56,162 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:10:56,163 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:10:56,164 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-12.i [2025-03-08 17:10:57,257 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206616828/7b01b41a7e534be7bfcea655e7e28af6/FLAGcb6a36fe5 [2025-03-08 17:10:57,537 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:10:57,537 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-12.i [2025-03-08 17:10:57,550 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206616828/7b01b41a7e534be7bfcea655e7e28af6/FLAGcb6a36fe5 [2025-03-08 17:10:57,844 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206616828/7b01b41a7e534be7bfcea655e7e28af6 [2025-03-08 17:10:57,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:10:57,849 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:10:57,851 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:10:57,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:10:57,855 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:10:57,856 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:10:57" (1/1) ... [2025-03-08 17:10:57,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d8718d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:57, skipping insertion in model container [2025-03-08 17:10:57,857 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:10:57" (1/1) ... [2025-03-08 17:10:57,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:10:58,128 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_unsafe-12.i[30243,30256] [2025-03-08 17:10:58,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:10:58,157 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:10:58,184 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_unsafe-12.i[30243,30256] [2025-03-08 17:10:58,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:10:58,212 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:10:58,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58 WrapperNode [2025-03-08 17:10:58,213 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:10:58,214 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:10:58,214 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:10:58,214 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:10:58,218 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,228 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,241 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-03-08 17:10:58,243 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:10:58,243 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:10:58,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:10:58,243 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:10:58,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,249 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,256 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 17:10:58,256 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,256 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,260 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,260 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,265 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,265 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,267 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:10:58,267 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:10:58,267 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:10:58,267 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:10:58,268 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (1/1) ... [2025-03-08 17:10:58,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:10:58,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:10:58,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:10:58,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:10:58,319 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-08 17:10:58,320 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-08 17:10:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-08 17:10:58,320 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-08 17:10:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:10:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:10:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:10:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:10:58,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:10:58,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:10:58,321 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:10:58,408 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:10:58,410 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:10:58,543 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:10:58,543 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:10:58,621 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:10:58,621 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:10:58,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:10:58 BoogieIcfgContainer [2025-03-08 17:10:58,622 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:10:58,623 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:10:58,624 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:10:58,629 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:10:58,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:10:57" (1/3) ... [2025-03-08 17:10:58,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cb2670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:10:58, skipping insertion in model container [2025-03-08 17:10:58,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:58" (2/3) ... [2025-03-08 17:10:58,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cb2670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:10:58, skipping insertion in model container [2025-03-08 17:10:58,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:10:58" (3/3) ... [2025-03-08 17:10:58,630 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2025-03-08 17:10:58,641 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:10:58,643 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-12.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 17:10:58,643 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:10:58,672 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 17:10:58,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-03-08 17:10:58,713 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-03-08 17:10:58,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 17:10:58,717 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. [2025-03-08 17:10:58,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-03-08 17:10:58,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-03-08 17:10:58,727 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:10:58,733 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;@5536eb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:10:58,734 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:10:58,741 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:10:58,741 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-03-08 17:10:58,742 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 17:10:58,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:10:58,742 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:10:58,742 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:10:58,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:10:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash -412560026, now seen corresponding path program 1 times [2025-03-08 17:10:58,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:10:58,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071888597] [2025-03-08 17:10:58,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:10:58,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:10:58,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 17:10:58,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 17:10:58,833 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:10:58,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:58,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:10:58,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071888597] [2025-03-08 17:10:58,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071888597] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:10:58,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:10:58,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:10:58,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448453390] [2025-03-08 17:10:58,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:10:58,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:10:58,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:10:58,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:10:58,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:10:58,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-08 17:10:58,965 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) [2025-03-08 17:10:58,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:10:58,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-08 17:10:58,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:10:59,099 INFO L124 PetriNetUnfolderBase]: 233/410 cut-off events. [2025-03-08 17:10:59,099 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-08 17:10:59,101 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. [2025-03-08 17:10:59,103 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-03-08 17:10:59,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-03-08 17:10:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:10:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:10:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-08 17:10:59,111 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-08 17:10:59,112 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-03-08 17:10:59,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-03-08 17:10:59,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:10:59,116 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-03-08 17:10:59,118 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} [2025-03-08 17:10:59,122 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-08 17:10:59,123 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-03-08 17:10:59,123 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) [2025-03-08 17:10:59,123 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:10:59,123 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:10:59,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:10:59,123 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:10:59,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:10:59,124 INFO L85 PathProgramCache]: Analyzing trace with hash 103279624, now seen corresponding path program 1 times [2025-03-08 17:10:59,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:10:59,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123487078] [2025-03-08 17:10:59,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:10:59,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:10:59,131 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:10:59,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:10:59,136 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:10:59,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:59,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:10:59,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123487078] [2025-03-08 17:10:59,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123487078] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:10:59,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18271412] [2025-03-08 17:10:59,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:10:59,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:10:59,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:10:59,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:10:59,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:10:59,239 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:10:59,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:10:59,255 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:10:59,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:59,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-08 17:10:59,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:10:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:59,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:10:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:59,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18271412] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:10:59,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:10:59,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-08 17:10:59,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928007275] [2025-03-08 17:10:59,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:10:59,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:10:59,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:10:59,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:10:59,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:10:59,313 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-08 17:10:59,314 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) [2025-03-08 17:10:59,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:10:59,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-08 17:10:59,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:10:59,471 INFO L124 PetriNetUnfolderBase]: 297/506 cut-off events. [2025-03-08 17:10:59,471 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:10:59,473 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. [2025-03-08 17:10:59,476 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-08 17:10:59,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-03-08 17:10:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:10:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:10:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-03-08 17:10:59,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-03-08 17:10:59,479 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-03-08 17:10:59,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-03-08 17:10:59,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:10:59,480 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-03-08 17:10:59,482 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} [2025-03-08 17:10:59,483 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-03-08 17:10:59,483 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-03-08 17:10:59,483 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) [2025-03-08 17:10:59,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:10:59,483 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:10:59,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:10:59,683 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 [2025-03-08 17:10:59,684 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:10:59,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:10:59,685 INFO L85 PathProgramCache]: Analyzing trace with hash 701132262, now seen corresponding path program 2 times [2025-03-08 17:10:59,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:10:59,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133979883] [2025-03-08 17:10:59,685 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:10:59,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:10:59,697 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:10:59,722 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:10:59,722 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:10:59,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:59,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:10:59,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133979883] [2025-03-08 17:10:59,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133979883] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:10:59,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636704547] [2025-03-08 17:10:59,806 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:10:59,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:10:59,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:10:59,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:10:59,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:10:59,850 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:10:59,871 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:10:59,871 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:10:59,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:59,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:10:59,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:10:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:59,891 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:10:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:59,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636704547] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:10:59,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:10:59,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-08 17:10:59,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285406743] [2025-03-08 17:10:59,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:10:59,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:10:59,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:10:59,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:10:59,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:10:59,940 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-08 17:10:59,941 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) [2025-03-08 17:10:59,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:10:59,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-08 17:10:59,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:11:00,140 INFO L124 PetriNetUnfolderBase]: 489/794 cut-off events. [2025-03-08 17:11:00,140 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-08 17:11:00,141 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. [2025-03-08 17:11:00,144 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-03-08 17:11:00,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-03-08 17:11:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:11:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:11:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-03-08 17:11:00,146 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-03-08 17:11:00,146 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-03-08 17:11:00,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-03-08 17:11:00,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-08 17:11:00,149 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-03-08 17:11:00,149 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} [2025-03-08 17:11:00,152 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-03-08 17:11:00,152 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-03-08 17:11:00,152 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) [2025-03-08 17:11:00,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:11:00,152 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:11:00,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:11:00,357 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 [2025-03-08 17:11:00,357 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:11:00,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:11:00,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1268144806, now seen corresponding path program 3 times [2025-03-08 17:11:00,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:11:00,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126670875] [2025-03-08 17:11:00,358 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:11:00,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:11:00,368 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-08 17:11:00,398 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:11:00,398 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 17:11:00,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:11:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:00,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:11:00,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126670875] [2025-03-08 17:11:00,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126670875] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:11:00,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033254279] [2025-03-08 17:11:00,560 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:11:00,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:11:00,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:11:00,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:11:00,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:11:00,595 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-08 17:11:00,617 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:11:00,617 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 17:11:00,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:11:00,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:11:00,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:11:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:00,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:11:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:00,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033254279] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:11:00,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:11:00,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-08 17:11:00,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176078737] [2025-03-08 17:11:00,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:11:00,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 17:11:00,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:11:00,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 17:11:00,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-08 17:11:00,846 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-08 17:11:00,846 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) [2025-03-08 17:11:00,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:11:00,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-08 17:11:00,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:11:01,235 INFO L124 PetriNetUnfolderBase]: 873/1370 cut-off events. [2025-03-08 17:11:01,235 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-03-08 17:11:01,239 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. [2025-03-08 17:11:01,245 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 195 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2025-03-08 17:11:01,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 223 transitions, 1054 flow [2025-03-08 17:11:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 17:11:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-08 17:11:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 398 transitions. [2025-03-08 17:11:01,248 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5718390804597702 [2025-03-08 17:11:01,249 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 398 transitions. [2025-03-08 17:11:01,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 223 transitions, 1054 flow [2025-03-08 17:11:01,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 223 transitions, 982 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-03-08 17:11:01,257 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2025-03-08 17:11:01,257 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} [2025-03-08 17:11:01,258 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2025-03-08 17:11:01,258 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2025-03-08 17:11:01,258 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) [2025-03-08 17:11:01,258 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:11:01,258 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:11:01,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 17:11:01,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:11:01,462 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:11:01,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:11:01,463 INFO L85 PathProgramCache]: Analyzing trace with hash 167543846, now seen corresponding path program 4 times [2025-03-08 17:11:01,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:11:01,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864467501] [2025-03-08 17:11:01,463 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:11:01,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:11:01,473 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-08 17:11:01,488 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 17:11:01,490 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:11:01,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:11:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:01,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:11:01,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864467501] [2025-03-08 17:11:01,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864467501] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:11:01,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146406282] [2025-03-08 17:11:01,891 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:11:01,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:11:01,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:11:01,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:11:01,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:11:01,935 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-08 17:11:01,961 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 17:11:01,961 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:11:01,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:11:01,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 17:11:01,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:11:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:02,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:11:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:02,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146406282] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:11:02,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:11:02,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2025-03-08 17:11:02,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399217690] [2025-03-08 17:11:02,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:11:02,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:11:02,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:11:02,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:11:02,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:11:02,320 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-08 17:11:02,320 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) [2025-03-08 17:11:02,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:11:02,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-08 17:11:02,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:11:02,710 INFO L124 PetriNetUnfolderBase]: 1001/1562 cut-off events. [2025-03-08 17:11:02,711 INFO L125 PetriNetUnfolderBase]: For 16588/16588 co-relation queries the response was YES. [2025-03-08 17:11:02,715 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. [2025-03-08 17:11:02,722 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 227 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2025-03-08 17:11:02,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 259 transitions, 1246 flow [2025-03-08 17:11:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 17:11:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-08 17:11:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 454 transitions. [2025-03-08 17:11:02,725 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5591133004926109 [2025-03-08 17:11:02,725 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 28 states and 454 transitions. [2025-03-08 17:11:02,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 259 transitions, 1246 flow [2025-03-08 17:11:02,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 259 transitions, 1142 flow, removed 41 selfloop flow, removed 11 redundant places. [2025-03-08 17:11:02,756 INFO L231 Difference]: Finished difference. Result has 103 places, 51 transitions, 290 flow [2025-03-08 17:11:02,756 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} [2025-03-08 17:11:02,756 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2025-03-08 17:11:02,756 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 51 transitions, 290 flow [2025-03-08 17:11:02,757 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) [2025-03-08 17:11:02,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:11:02,757 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:11:02,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 17:11:02,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:11:02,957 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:11:02,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:11:02,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1768471718, now seen corresponding path program 5 times [2025-03-08 17:11:02,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:11:02,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598544007] [2025-03-08 17:11:02,958 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:11:02,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:11:02,967 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-03-08 17:11:03,057 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:11:03,058 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-08 17:11:03,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:11:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:04,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:11:04,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598544007] [2025-03-08 17:11:04,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598544007] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:11:04,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812229373] [2025-03-08 17:11:04,608 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:11:04,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:11:04,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:11:04,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:11:04,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:11:04,658 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-03-08 17:11:04,703 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:11:04,703 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-08 17:11:04,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:11:04,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-03-08 17:11:04,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:11:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:06,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:11:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:07,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812229373] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:11:07,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:11:07,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 95 [2025-03-08 17:11:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475465057] [2025-03-08 17:11:07,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:11:07,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-03-08 17:11:07,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:11:07,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-03-08 17:11:07,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=7786, Unknown=0, NotChecked=0, Total=9120 [2025-03-08 17:11:07,786 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-08 17:11:07,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 51 transitions, 290 flow. Second operand has 96 states, 96 states have (on average 6.166666666666667) internal successors, (592), 96 states have internal predecessors, (592), 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) [2025-03-08 17:11:07,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:11:07,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-08 17:11:07,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:11:49,414 INFO L124 PetriNetUnfolderBase]: 41560/67200 cut-off events. [2025-03-08 17:11:49,414 INFO L125 PetriNetUnfolderBase]: For 240492/240492 co-relation queries the response was YES. [2025-03-08 17:11:49,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183567 conditions, 67200 events. 41560/67200 cut-off events. For 240492/240492 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 456429 event pairs, 679 based on Foata normal form. 0/66620 useless extension candidates. Maximal degree in co-relation 183523. Up to 8745 conditions per place. [2025-03-08 17:11:49,861 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 809 selfloop transitions, 1594 changer transitions 1229/3635 dead transitions. [2025-03-08 17:11:49,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 3635 transitions, 24855 flow [2025-03-08 17:11:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2025-03-08 17:11:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2025-03-08 17:11:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 3516 transitions. [2025-03-08 17:11:49,869 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4699278267842823 [2025-03-08 17:11:49,869 INFO L175 Difference]: Start difference. First operand has 103 places, 51 transitions, 290 flow. Second operand 258 states and 3516 transitions. [2025-03-08 17:11:49,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 3635 transitions, 24855 flow [2025-03-08 17:11:50,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 3635 transitions, 20833 flow, removed 754 selfloop flow, removed 23 redundant places. [2025-03-08 17:11:50,396 INFO L231 Difference]: Finished difference. Result has 455 places, 1744 transitions, 10756 flow [2025-03-08 17:11:50,396 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=10756, PETRI_PLACES=455, PETRI_TRANSITIONS=1744} [2025-03-08 17:11:50,397 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 425 predicate places. [2025-03-08 17:11:50,397 INFO L471 AbstractCegarLoop]: Abstraction has has 455 places, 1744 transitions, 10756 flow [2025-03-08 17:11:50,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 6.166666666666667) internal successors, (592), 96 states have internal predecessors, (592), 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) [2025-03-08 17:11:50,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:11:50,398 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:11:50,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:11:50,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:11:50,602 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:11:50,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:11:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash 771720804, now seen corresponding path program 1 times [2025-03-08 17:11:50,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:11:50,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025332804] [2025-03-08 17:11:50,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:11:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:11:50,608 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 17:11:50,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 17:11:50,630 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:11:50,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:11:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:52,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:11:52,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025332804] [2025-03-08 17:11:52,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025332804] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:11:52,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377590443] [2025-03-08 17:11:52,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:11:52,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:11:52,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:11:52,119 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:11:52,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:11:52,154 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 17:11:52,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 17:11:52,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:11:52,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:11:52,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-03-08 17:11:52,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:11:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 300 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:53,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:11:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:55,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377590443] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:11:55,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:11:55,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 101 [2025-03-08 17:11:55,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431610087] [2025-03-08 17:11:55,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:11:55,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2025-03-08 17:11:55,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:11:55,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2025-03-08 17:11:55,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1426, Invalid=8876, Unknown=0, NotChecked=0, Total=10302 [2025-03-08 17:11:55,207 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-08 17:11:55,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1744 transitions, 10756 flow. Second operand has 102 states, 102 states have (on average 6.215686274509804) internal successors, (634), 102 states have internal predecessors, (634), 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) [2025-03-08 17:11:55,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:11:55,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-08 17:11:55,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand