./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 341ac5a9697f243416924cef7ae19a5e9bc693a5982154ab196fb2faacf237d5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:34:45,554 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:34:45,611 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:34:45,617 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:34:45,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:34:45,637 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:34:45,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:34:45,638 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:34:45,638 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:34:45,638 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:34:45,638 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:34:45,638 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:34:45,638 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:34:45,638 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:34:45,639 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:34:45,640 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:34:45,640 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:34:45,640 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:34:45,640 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:34:45,640 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:34:45,640 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:34:45,640 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:34:45,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:34:45,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:34:45,640 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:34:45,640 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:34:45,641 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:34:45,641 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:34:45,641 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:34:45,642 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:34:45,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:34:45,642 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 -> 341ac5a9697f243416924cef7ae19a5e9bc693a5982154ab196fb2faacf237d5 [2025-03-08 17:34:45,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:34:45,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:34:45,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:34:45,881 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:34:45,881 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:34:45,883 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2025-03-08 17:34:46,973 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c87e0b8/acd78a64e3d8473093d7a1a2c084bef7/FLAG004ea2a59 [2025-03-08 17:34:47,200 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:34:47,201 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2025-03-08 17:34:47,207 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c87e0b8/acd78a64e3d8473093d7a1a2c084bef7/FLAG004ea2a59 [2025-03-08 17:34:47,217 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c87e0b8/acd78a64e3d8473093d7a1a2c084bef7 [2025-03-08 17:34:47,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:34:47,220 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:34:47,223 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:34:47,223 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:34:47,226 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:34:47,226 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dfc3d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47, skipping insertion in model container [2025-03-08 17:34:47,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,243 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:34:47,372 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/weaver/popl20-min-max-inc.wvr.c[2682,2695] [2025-03-08 17:34:47,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:34:47,390 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:34:47,411 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/weaver/popl20-min-max-inc.wvr.c[2682,2695] [2025-03-08 17:34:47,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:34:47,431 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:34:47,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47 WrapperNode [2025-03-08 17:34:47,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:34:47,433 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:34:47,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:34:47,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:34:47,438 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,444 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,461 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 112 [2025-03-08 17:34:47,462 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:34:47,462 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:34:47,463 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:34:47,463 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:34:47,468 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,470 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,486 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-08 17:34:47,486 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,486 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,490 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,491 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,492 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,492 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:34:47,496 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:34:47,496 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:34:47,496 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:34:47,497 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (1/1) ... [2025-03-08 17:34:47,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:34:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:34:47,521 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 17:34:47,523 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 17:34:47,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:34:47,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:34:47,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:34:47,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:34:47,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:34:47,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-08 17:34:47,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-08 17:34:47,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-08 17:34:47,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-08 17:34:47,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:34:47,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:34:47,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:34:47,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:34:47,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:34:47,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:34:47,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:34:47,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:34:47,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:34:47,541 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 17:34:47,612 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:34:47,613 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:34:47,842 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:34:47,843 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:34:47,974 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:34:47,975 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:34:47,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:34:47 BoogieIcfgContainer [2025-03-08 17:34:47,975 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:34:47,977 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:34:47,978 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:34:47,981 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:34:47,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:34:47" (1/3) ... [2025-03-08 17:34:47,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1829fa3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:34:47, skipping insertion in model container [2025-03-08 17:34:47,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:47" (2/3) ... [2025-03-08 17:34:47,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1829fa3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:34:47, skipping insertion in model container [2025-03-08 17:34:47,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:34:47" (3/3) ... [2025-03-08 17:34:47,983 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2025-03-08 17:34:47,994 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:34:47,995 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-min-max-inc.wvr.c that has 5 procedures, 57 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-08 17:34:47,995 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:34:48,051 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-08 17:34:48,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 62 transitions, 152 flow [2025-03-08 17:34:48,109 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2025-03-08 17:34:48,113 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:34:48,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 58 events. 6/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2025-03-08 17:34:48,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 62 transitions, 152 flow [2025-03-08 17:34:48,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 57 transitions, 138 flow [2025-03-08 17:34:48,124 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:34:48,131 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;@43065b35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:34:48,132 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-08 17:34:48,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:34:48,147 INFO L124 PetriNetUnfolderBase]: 6/56 cut-off events. [2025-03-08 17:34:48,147 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:34:48,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:48,148 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:48,149 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:34:48,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash 485313208, now seen corresponding path program 1 times [2025-03-08 17:34:48,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:48,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482147549] [2025-03-08 17:34:48,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:34:48,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:48,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 17:34:48,269 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:34:48,270 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:48,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:48,495 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 17:34:48,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:48,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482147549] [2025-03-08 17:34:48,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482147549] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:34:48,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:34:48,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:34:48,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570393448] [2025-03-08 17:34:48,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:34:48,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:34:48,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:48,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:34:48,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:34:48,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-08 17:34:48,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 17:34:48,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:48,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-08 17:34:48,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:50,885 INFO L124 PetriNetUnfolderBase]: 29126/39672 cut-off events. [2025-03-08 17:34:50,886 INFO L125 PetriNetUnfolderBase]: For 1832/1832 co-relation queries the response was YES. [2025-03-08 17:34:50,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78941 conditions, 39672 events. 29126/39672 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 240807 event pairs, 13149 based on Foata normal form. 850/39762 useless extension candidates. Maximal degree in co-relation 75425. Up to 21730 conditions per place. [2025-03-08 17:34:51,148 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 68 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2025-03-08 17:34:51,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 345 flow [2025-03-08 17:34:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:34:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:34:51,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2025-03-08 17:34:51,160 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2025-03-08 17:34:51,161 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 138 flow. Second operand 4 states and 144 transitions. [2025-03-08 17:34:51,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 345 flow [2025-03-08 17:34:51,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 323 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-08 17:34:51,198 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 136 flow [2025-03-08 17:34:51,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2025-03-08 17:34:51,203 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, -4 predicate places. [2025-03-08 17:34:51,203 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 136 flow [2025-03-08 17:34:51,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 17:34:51,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:51,204 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:51,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:34:51,204 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:34:51,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1481624911, now seen corresponding path program 1 times [2025-03-08 17:34:51,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:51,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493428002] [2025-03-08 17:34:51,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:34:51,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:51,228 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-08 17:34:51,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:34:51,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:51,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:34:51,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493428002] [2025-03-08 17:34:51,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493428002] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:34:51,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:34:51,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:34:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040093469] [2025-03-08 17:34:51,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:34:51,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:34:51,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:51,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:34:51,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:34:51,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2025-03-08 17:34:51,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 17:34:51,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:51,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2025-03-08 17:34:51,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:53,498 INFO L124 PetriNetUnfolderBase]: 35839/52361 cut-off events. [2025-03-08 17:34:53,498 INFO L125 PetriNetUnfolderBase]: For 4866/4866 co-relation queries the response was YES. [2025-03-08 17:34:53,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104292 conditions, 52361 events. 35839/52361 cut-off events. For 4866/4866 co-relation queries the response was YES. Maximal size of possible extension queue 1453. Compared 367266 event pairs, 20230 based on Foata normal form. 920/50704 useless extension candidates. Maximal degree in co-relation 23141. Up to 32645 conditions per place. [2025-03-08 17:34:53,724 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 71 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2025-03-08 17:34:53,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 355 flow [2025-03-08 17:34:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:34:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:34:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2025-03-08 17:34:53,726 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5685483870967742 [2025-03-08 17:34:53,726 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 136 flow. Second operand 4 states and 141 transitions. [2025-03-08 17:34:53,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 355 flow [2025-03-08 17:34:53,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:34:53,733 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 146 flow [2025-03-08 17:34:53,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2025-03-08 17:34:53,734 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, -2 predicate places. [2025-03-08 17:34:53,734 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 146 flow [2025-03-08 17:34:53,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 17:34:53,735 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:53,736 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:53,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:34:53,736 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:34:53,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash 531588830, now seen corresponding path program 1 times [2025-03-08 17:34:53,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:53,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261225061] [2025-03-08 17:34:53,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:34:53,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:53,751 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 17:34:53,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 17:34:53,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:53,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:34:53,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:53,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261225061] [2025-03-08 17:34:53,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261225061] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:34:53,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:34:53,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:34:53,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929949091] [2025-03-08 17:34:53,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:34:53,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:34:53,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:53,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:34:53,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:34:53,864 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2025-03-08 17:34:53,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 17:34:53,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:53,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2025-03-08 17:34:53,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:56,492 INFO L124 PetriNetUnfolderBase]: 47955/69413 cut-off events. [2025-03-08 17:34:56,492 INFO L125 PetriNetUnfolderBase]: For 8100/9217 co-relation queries the response was YES. [2025-03-08 17:34:56,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145421 conditions, 69413 events. 47955/69413 cut-off events. For 8100/9217 co-relation queries the response was YES. Maximal size of possible extension queue 1640. Compared 484975 event pairs, 27914 based on Foata normal form. 2381/68485 useless extension candidates. Maximal degree in co-relation 41637. Up to 43877 conditions per place. [2025-03-08 17:34:56,740 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 72 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2025-03-08 17:34:56,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 372 flow [2025-03-08 17:34:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:34:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:34:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2025-03-08 17:34:56,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2025-03-08 17:34:56,742 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 146 flow. Second operand 4 states and 140 transitions. [2025-03-08 17:34:56,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 372 flow [2025-03-08 17:34:56,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 367 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:34:56,747 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 156 flow [2025-03-08 17:34:56,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2025-03-08 17:34:56,747 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2025-03-08 17:34:56,747 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 156 flow [2025-03-08 17:34:56,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 17:34:56,748 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:56,748 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:56,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:34:56,748 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:34:56,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:56,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1513810455, now seen corresponding path program 1 times [2025-03-08 17:34:56,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:56,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976025845] [2025-03-08 17:34:56,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:34:56,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:56,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 17:34:56,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 17:34:56,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:56,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:34:56,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:56,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976025845] [2025-03-08 17:34:56,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976025845] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:34:56,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:34:56,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:34:56,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716010938] [2025-03-08 17:34:56,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:34:56,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:34:56,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:56,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:34:56,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:34:56,853 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-08 17:34:56,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 17:34:56,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:56,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-08 17:34:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:59,779 INFO L124 PetriNetUnfolderBase]: 44415/64010 cut-off events. [2025-03-08 17:34:59,779 INFO L125 PetriNetUnfolderBase]: For 10520/12666 co-relation queries the response was YES. [2025-03-08 17:34:59,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137988 conditions, 64010 events. 44415/64010 cut-off events. For 10520/12666 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 440389 event pairs, 36184 based on Foata normal form. 2146/62778 useless extension candidates. Maximal degree in co-relation 44425. Up to 57138 conditions per place. [2025-03-08 17:35:00,002 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 45 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2025-03-08 17:35:00,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 252 flow [2025-03-08 17:35:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:35:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:35:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2025-03-08 17:35:00,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2025-03-08 17:35:00,005 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 156 flow. Second operand 3 states and 99 transitions. [2025-03-08 17:35:00,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 252 flow [2025-03-08 17:35:00,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:35:00,016 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 164 flow [2025-03-08 17:35:00,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2025-03-08 17:35:00,017 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2025-03-08 17:35:00,017 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 164 flow [2025-03-08 17:35:00,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 17:35:00,018 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:00,018 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:00,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:35:00,018 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:00,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:00,019 INFO L85 PathProgramCache]: Analyzing trace with hash 45004916, now seen corresponding path program 1 times [2025-03-08 17:35:00,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:00,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569019369] [2025-03-08 17:35:00,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:00,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:00,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-08 17:35:00,044 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-08 17:35:00,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:00,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:35:00,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:00,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569019369] [2025-03-08 17:35:00,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569019369] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:00,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:00,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 17:35:00,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208934217] [2025-03-08 17:35:00,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:00,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:35:00,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:00,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:35:00,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:35:00,353 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-08 17:35:00,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 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 17:35:00,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:00,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-08 17:35:00,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:12,057 INFO L124 PetriNetUnfolderBase]: 167152/243863 cut-off events. [2025-03-08 17:35:12,058 INFO L125 PetriNetUnfolderBase]: For 40854/45719 co-relation queries the response was YES. [2025-03-08 17:35:12,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513312 conditions, 243863 events. 167152/243863 cut-off events. For 40854/45719 co-relation queries the response was YES. Maximal size of possible extension queue 5555. Compared 1974781 event pairs, 20327 based on Foata normal form. 4869/238823 useless extension candidates. Maximal degree in co-relation 513294. Up to 66444 conditions per place. [2025-03-08 17:35:12,933 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 402 selfloop transitions, 88 changer transitions 396/898 dead transitions. [2025-03-08 17:35:12,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 898 transitions, 4185 flow [2025-03-08 17:35:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-08 17:35:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-03-08 17:35:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1595 transitions. [2025-03-08 17:35:12,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5250164581961817 [2025-03-08 17:35:12,937 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 164 flow. Second operand 49 states and 1595 transitions. [2025-03-08 17:35:12,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 898 transitions, 4185 flow [2025-03-08 17:35:13,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 898 transitions, 4181 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:13,683 INFO L231 Difference]: Finished difference. Result has 147 places, 157 transitions, 808 flow [2025-03-08 17:35:13,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=808, PETRI_PLACES=147, PETRI_TRANSITIONS=157} [2025-03-08 17:35:13,684 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, 83 predicate places. [2025-03-08 17:35:13,684 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 157 transitions, 808 flow [2025-03-08 17:35:13,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 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 17:35:13,684 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:13,684 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:13,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:35:13,684 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:13,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:13,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1329634288, now seen corresponding path program 2 times [2025-03-08 17:35:13,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:13,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773303292] [2025-03-08 17:35:13,685 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:35:13,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:13,695 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-08 17:35:13,710 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 52 of 53 statements. [2025-03-08 17:35:13,710 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:35:13,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:35:14,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:14,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773303292] [2025-03-08 17:35:14,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773303292] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:14,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:14,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2025-03-08 17:35:14,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053280121] [2025-03-08 17:35:14,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:14,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:35:14,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:14,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:35:14,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:35:14,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-08 17:35:14,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 157 transitions, 808 flow. Second operand has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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 17:35:14,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:14,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-08 17:35:14,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand