./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-mult.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 e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 02:24:13,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 02:24:13,544 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-04 02:24:13,547 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 02:24:13,549 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 02:24:13,568 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 02:24:13,568 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 02:24:13,569 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 02:24:13,569 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 02:24:13,569 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 02:24:13,569 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 02:24:13,569 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 02:24:13,569 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 02:24:13,569 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 02:24:13,569 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 02:24:13,569 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 02:24:13,569 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 02:24:13,569 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 02:24:13,569 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 02:24:13,569 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 02:24:13,570 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:24:13,570 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 02:24:13,570 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 02:24:13,571 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 02:24:13,571 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 02:24:13,571 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 02:24:13,571 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 02:24:13,571 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 02:24:13,571 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 -> e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe [2025-03-04 02:24:13,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 02:24:13,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 02:24:13,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 02:24:13,796 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 02:24:13,796 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 02:24:13,797 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2025-03-04 02:24:14,976 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04a67894/5ae4328b2c2e452fb00f115e0d711881/FLAGc7f4293d2 [2025-03-04 02:24:15,183 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 02:24:15,184 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2025-03-04 02:24:15,192 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04a67894/5ae4328b2c2e452fb00f115e0d711881/FLAGc7f4293d2 [2025-03-04 02:24:15,208 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04a67894/5ae4328b2c2e452fb00f115e0d711881 [2025-03-04 02:24:15,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 02:24:15,212 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 02:24:15,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 02:24:15,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 02:24:15,216 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 02:24:15,217 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,218 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a66a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15, skipping insertion in model container [2025-03-04 02:24:15,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,233 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 02:24:15,379 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-more-buffer-mult.wvr.c[4270,4283] [2025-03-04 02:24:15,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:24:15,400 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 02:24:15,425 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-more-buffer-mult.wvr.c[4270,4283] [2025-03-04 02:24:15,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:24:15,448 INFO L204 MainTranslator]: Completed translation [2025-03-04 02:24:15,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15 WrapperNode [2025-03-04 02:24:15,448 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 02:24:15,450 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 02:24:15,450 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 02:24:15,450 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 02:24:15,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,477 INFO L138 Inliner]: procedures = 26, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 278 [2025-03-04 02:24:15,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 02:24:15,478 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 02:24:15,478 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 02:24:15,478 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 02:24:15,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,506 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2025-03-04 02:24:15,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,506 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,513 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,514 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,515 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,517 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,519 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 02:24:15,522 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 02:24:15,522 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 02:24:15,522 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 02:24:15,523 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (1/1) ... [2025-03-04 02:24:15,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:24:15,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:24:15,547 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) [2025-03-04 02:24:15,552 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 [2025-03-04 02:24:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 02:24:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 02:24:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 02:24:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 02:24:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 02:24:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 02:24:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 02:24:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 02:24:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 02:24:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-04 02:24:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-04 02:24:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-04 02:24:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-04 02:24:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 02:24:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 02:24:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-04 02:24:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-04 02:24:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 02:24:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 02:24:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 02:24:15,570 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 02:24:15,652 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 02:24:15,654 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 02:24:15,960 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 02:24:15,961 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 02:24:16,208 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 02:24:16,208 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 02:24:16,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:24:16 BoogieIcfgContainer [2025-03-04 02:24:16,209 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 02:24:16,210 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 02:24:16,210 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 02:24:16,213 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 02:24:16,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 02:24:15" (1/3) ... [2025-03-04 02:24:16,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0096eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:24:16, skipping insertion in model container [2025-03-04 02:24:16,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:24:15" (2/3) ... [2025-03-04 02:24:16,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0096eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:24:16, skipping insertion in model container [2025-03-04 02:24:16,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:24:16" (3/3) ... [2025-03-04 02:24:16,215 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2025-03-04 02:24:16,225 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 02:24:16,226 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-mult.wvr.c that has 5 procedures, 45 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-04 02:24:16,226 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 02:24:16,271 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-04 02:24:16,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 50 transitions, 128 flow [2025-03-04 02:24:16,325 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2025-03-04 02:24:16,326 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 02:24:16,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 46 events. 6/46 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2025-03-04 02:24:16,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 50 transitions, 128 flow [2025-03-04 02:24:16,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 45 transitions, 114 flow [2025-03-04 02:24:16,341 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:24:16,350 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;@60d62a9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:24:16,351 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-04 02:24:16,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:24:16,366 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2025-03-04 02:24:16,366 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 02:24:16,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:16,367 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] [2025-03-04 02:24:16,367 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)] === [2025-03-04 02:24:16,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:16,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2018356736, now seen corresponding path program 1 times [2025-03-04 02:24:16,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:16,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782067069] [2025-03-04 02:24:16,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:24:16,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:16,439 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-04 02:24:16,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-04 02:24:16,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:24:16,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:24:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:16,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782067069] [2025-03-04 02:24:16,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782067069] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:16,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:16,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 02:24:16,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905147445] [2025-03-04 02:24:16,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:16,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 02:24:16,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:16,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 02:24:16,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 02:24:16,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-04 02:24:16,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2025-03-04 02:24:16,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:16,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-04 02:24:16,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:24:17,414 INFO L124 PetriNetUnfolderBase]: 5628/7732 cut-off events. [2025-03-04 02:24:17,414 INFO L125 PetriNetUnfolderBase]: For 490/490 co-relation queries the response was YES. [2025-03-04 02:24:17,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15598 conditions, 7732 events. 5628/7732 cut-off events. For 490/490 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 39086 event pairs, 1634 based on Foata normal form. 1/7594 useless extension candidates. Maximal degree in co-relation 14262. Up to 4718 conditions per place. [2025-03-04 02:24:17,467 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 55 selfloop transitions, 3 changer transitions 1/68 dead transitions. [2025-03-04 02:24:17,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 293 flow [2025-03-04 02:24:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 02:24:17,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 02:24:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2025-03-04 02:24:17,478 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2025-03-04 02:24:17,480 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 114 flow. Second operand 3 states and 99 transitions. [2025-03-04 02:24:17,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 293 flow [2025-03-04 02:24:17,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 267 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-04 02:24:17,501 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 117 flow [2025-03-04 02:24:17,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2025-03-04 02:24:17,507 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2025-03-04 02:24:17,507 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 117 flow [2025-03-04 02:24:17,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2025-03-04 02:24:17,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:17,507 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] [2025-03-04 02:24:17,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 02:24:17,508 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)] === [2025-03-04 02:24:17,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:17,509 INFO L85 PathProgramCache]: Analyzing trace with hash 227300240, now seen corresponding path program 1 times [2025-03-04 02:24:17,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:17,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732590842] [2025-03-04 02:24:17,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:24:17,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:17,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-04 02:24:17,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-04 02:24:17,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:24:17,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:24:17,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:17,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732590842] [2025-03-04 02:24:17,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732590842] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:17,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:17,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 02:24:17,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692456828] [2025-03-04 02:24:17,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:17,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 02:24:17,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:17,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 02:24:17,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 02:24:17,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-04 02:24:17,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2025-03-04 02:24:17,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:17,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-04 02:24:17,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:24:18,285 INFO L124 PetriNetUnfolderBase]: 6878/9587 cut-off events. [2025-03-04 02:24:18,286 INFO L125 PetriNetUnfolderBase]: For 1240/1240 co-relation queries the response was YES. [2025-03-04 02:24:18,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20238 conditions, 9587 events. 6878/9587 cut-off events. For 1240/1240 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 51998 event pairs, 2262 based on Foata normal form. 231/9748 useless extension candidates. Maximal degree in co-relation 7916. Up to 6208 conditions per place. [2025-03-04 02:24:18,358 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 62 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2025-03-04 02:24:18,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 73 transitions, 311 flow [2025-03-04 02:24:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 02:24:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 02:24:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2025-03-04 02:24:18,361 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2025-03-04 02:24:18,362 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 117 flow. Second operand 3 states and 101 transitions. [2025-03-04 02:24:18,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 73 transitions, 311 flow [2025-03-04 02:24:18,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 73 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 02:24:18,364 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 128 flow [2025-03-04 02:24:18,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2025-03-04 02:24:18,365 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2025-03-04 02:24:18,365 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 128 flow [2025-03-04 02:24:18,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2025-03-04 02:24:18,365 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:18,365 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] [2025-03-04 02:24:18,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 02:24:18,365 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)] === [2025-03-04 02:24:18,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash -815174038, now seen corresponding path program 1 times [2025-03-04 02:24:18,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:18,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964968401] [2025-03-04 02:24:18,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:24:18,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:18,379 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-04 02:24:18,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-04 02:24:18,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:24:18,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:24:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:18,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964968401] [2025-03-04 02:24:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964968401] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:18,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:18,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 02:24:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428606665] [2025-03-04 02:24:18,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:18,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 02:24:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:18,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 02:24:18,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 02:24:18,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-04 02:24:18,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2025-03-04 02:24:18,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:18,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-04 02:24:18,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:24:19,187 INFO L124 PetriNetUnfolderBase]: 8266/11678 cut-off events. [2025-03-04 02:24:19,189 INFO L125 PetriNetUnfolderBase]: For 3103/3103 co-relation queries the response was YES. [2025-03-04 02:24:19,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25390 conditions, 11678 events. 8266/11678 cut-off events. For 3103/3103 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 64969 event pairs, 2562 based on Foata normal form. 162/11799 useless extension candidates. Maximal degree in co-relation 17438. Up to 7562 conditions per place. [2025-03-04 02:24:19,243 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 62 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2025-03-04 02:24:19,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 327 flow [2025-03-04 02:24:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 02:24:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 02:24:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2025-03-04 02:24:19,247 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2025-03-04 02:24:19,247 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 128 flow. Second operand 3 states and 99 transitions. [2025-03-04 02:24:19,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 327 flow [2025-03-04 02:24:19,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 02:24:19,251 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 140 flow [2025-03-04 02:24:19,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2025-03-04 02:24:19,252 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2025-03-04 02:24:19,252 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 140 flow [2025-03-04 02:24:19,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2025-03-04 02:24:19,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:19,252 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] [2025-03-04 02:24:19,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 02:24:19,253 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)] === [2025-03-04 02:24:19,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:19,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1051624197, now seen corresponding path program 1 times [2025-03-04 02:24:19,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:19,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888943015] [2025-03-04 02:24:19,254 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:24:19,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:19,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-04 02:24:19,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-04 02:24:19,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:24:19,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:24:19,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:19,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888943015] [2025-03-04 02:24:19,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888943015] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:19,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:19,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 02:24:19,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004679479] [2025-03-04 02:24:19,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:19,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:24:19,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:19,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:24:19,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 02:24:19,430 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-04 02:24:19,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2025-03-04 02:24:19,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:19,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-04 02:24:19,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:24:20,090 INFO L124 PetriNetUnfolderBase]: 10571/15237 cut-off events. [2025-03-04 02:24:20,090 INFO L125 PetriNetUnfolderBase]: For 5582/5582 co-relation queries the response was YES. [2025-03-04 02:24:20,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34145 conditions, 15237 events. 10571/15237 cut-off events. For 5582/5582 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 91982 event pairs, 8770 based on Foata normal form. 255/15392 useless extension candidates. Maximal degree in co-relation 16863. Up to 10988 conditions per place. [2025-03-04 02:24:20,147 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 69 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2025-03-04 02:24:20,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 83 transitions, 379 flow [2025-03-04 02:24:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 02:24:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 02:24:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2025-03-04 02:24:20,149 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.536 [2025-03-04 02:24:20,149 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 140 flow. Second operand 5 states and 134 transitions. [2025-03-04 02:24:20,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 83 transitions, 379 flow [2025-03-04 02:24:20,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 02:24:20,151 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 174 flow [2025-03-04 02:24:20,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2025-03-04 02:24:20,152 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2025-03-04 02:24:20,153 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 174 flow [2025-03-04 02:24:20,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2025-03-04 02:24:20,153 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:20,153 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] [2025-03-04 02:24:20,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-04 02:24:20,153 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)] === [2025-03-04 02:24:20,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:20,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1896841679, now seen corresponding path program 1 times [2025-03-04 02:24:20,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:20,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144946174] [2025-03-04 02:24:20,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:24:20,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:20,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-04 02:24:20,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-04 02:24:20,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:24:20,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:24:20,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:20,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144946174] [2025-03-04 02:24:20,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144946174] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:20,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:20,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 02:24:20,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318797195] [2025-03-04 02:24:20,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:20,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:24:20,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:20,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:24:20,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 02:24:20,283 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-04 02:24:20,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2025-03-04 02:24:20,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:20,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-04 02:24:20,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:24:21,161 INFO L124 PetriNetUnfolderBase]: 13578/19775 cut-off events. [2025-03-04 02:24:21,161 INFO L125 PetriNetUnfolderBase]: For 7328/7328 co-relation queries the response was YES. [2025-03-04 02:24:21,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43739 conditions, 19775 events. 13578/19775 cut-off events. For 7328/7328 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 126285 event pairs, 11518 based on Foata normal form. 385/20045 useless extension candidates. Maximal degree in co-relation 34600. Up to 14202 conditions per place. [2025-03-04 02:24:21,233 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 68 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2025-03-04 02:24:21,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 410 flow [2025-03-04 02:24:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 02:24:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 02:24:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2025-03-04 02:24:21,234 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.585 [2025-03-04 02:24:21,234 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 174 flow. Second operand 4 states and 117 transitions. [2025-03-04 02:24:21,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 410 flow [2025-03-04 02:24:21,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 404 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-04 02:24:21,240 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 192 flow [2025-03-04 02:24:21,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2025-03-04 02:24:21,241 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2025-03-04 02:24:21,242 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 192 flow [2025-03-04 02:24:21,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2025-03-04 02:24:21,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:21,242 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] [2025-03-04 02:24:21,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-04 02:24:21,242 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)] === [2025-03-04 02:24:21,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:21,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1013309648, now seen corresponding path program 1 times [2025-03-04 02:24:21,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:21,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513001276] [2025-03-04 02:24:21,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:24:21,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:21,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-04 02:24:21,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 02:24:21,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:24:21,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:24:21,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:21,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513001276] [2025-03-04 02:24:21,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513001276] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:21,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:21,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 02:24:21,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357317418] [2025-03-04 02:24:21,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:21,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 02:24:21,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:21,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 02:24:21,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-04 02:24:21,583 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-04 02:24:21,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 192 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2025-03-04 02:24:21,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:21,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-04 02:24:21,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:24:23,359 INFO L124 PetriNetUnfolderBase]: 21964/30797 cut-off events. [2025-03-04 02:24:23,359 INFO L125 PetriNetUnfolderBase]: For 11225/11225 co-relation queries the response was YES. [2025-03-04 02:24:23,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70311 conditions, 30797 events. 21964/30797 cut-off events. For 11225/11225 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 197563 event pairs, 1638 based on Foata normal form. 714/30093 useless extension candidates. Maximal degree in co-relation 58449. Up to 19758 conditions per place. [2025-03-04 02:24:23,489 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 140 selfloop transitions, 11 changer transitions 3/162 dead transitions. [2025-03-04 02:24:23,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 162 transitions, 828 flow [2025-03-04 02:24:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 02:24:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-04 02:24:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2025-03-04 02:24:23,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6371428571428571 [2025-03-04 02:24:23,490 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 192 flow. Second operand 7 states and 223 transitions. [2025-03-04 02:24:23,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 162 transitions, 828 flow [2025-03-04 02:24:23,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 162 transitions, 818 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-04 02:24:23,495 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 255 flow [2025-03-04 02:24:23,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2025-03-04 02:24:23,495 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2025-03-04 02:24:23,495 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 255 flow [2025-03-04 02:24:23,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2025-03-04 02:24:23,496 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:23,496 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] [2025-03-04 02:24:23,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-04 02:24:23,496 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-04 02:24:23,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1165057940, now seen corresponding path program 1 times [2025-03-04 02:24:23,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:23,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86755120] [2025-03-04 02:24:23,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:24:23,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:23,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-04 02:24:23,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 02:24:23,524 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:24:23,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:24:23,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86755120] [2025-03-04 02:24:23,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86755120] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:23,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:23,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 02:24:23,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872221981] [2025-03-04 02:24:23,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:23,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 02:24:23,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:23,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 02:24:23,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-04 02:24:23,817 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-04 02:24:23,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 255 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2025-03-04 02:24:23,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:23,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-04 02:24:23,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:24:26,403 INFO L124 PetriNetUnfolderBase]: 30940/44209 cut-off events. [2025-03-04 02:24:26,404 INFO L125 PetriNetUnfolderBase]: For 30054/30057 co-relation queries the response was YES. [2025-03-04 02:24:26,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115208 conditions, 44209 events. 30940/44209 cut-off events. For 30054/30057 co-relation queries the response was YES. Maximal size of possible extension queue 1747. Compared 299325 event pairs, 5343 based on Foata normal form. 1509/45698 useless extension candidates. Maximal degree in co-relation 96792. Up to 20130 conditions per place. [2025-03-04 02:24:26,720 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 169 selfloop transitions, 40 changer transitions 8/226 dead transitions. [2025-03-04 02:24:26,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 226 transitions, 1294 flow [2025-03-04 02:24:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 02:24:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-04 02:24:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2025-03-04 02:24:26,721 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2025-03-04 02:24:26,721 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 255 flow. Second operand 9 states and 280 transitions. [2025-03-04 02:24:26,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 226 transitions, 1294 flow [2025-03-04 02:24:26,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 226 transitions, 1294 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-04 02:24:26,813 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 665 flow [2025-03-04 02:24:26,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=665, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2025-03-04 02:24:26,813 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2025-03-04 02:24:26,813 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 665 flow [2025-03-04 02:24:26,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2025-03-04 02:24:26,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:26,814 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] [2025-03-04 02:24:26,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-04 02:24:26,814 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-04 02:24:26,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:26,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2029199040, now seen corresponding path program 2 times [2025-03-04 02:24:26,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:26,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954332727] [2025-03-04 02:24:26,815 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:24:26,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:26,825 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-04 02:24:26,852 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 33 of 37 statements. [2025-03-04 02:24:26,852 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 02:24:26,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 02:24:27,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:27,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954332727] [2025-03-04 02:24:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954332727] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:27,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:27,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 02:24:27,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487329233] [2025-03-04 02:24:27,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:27,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 02:24:27,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:27,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 02:24:27,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-04 02:24:27,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-04 02:24:27,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 665 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2025-03-04 02:24:27,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:27,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-04 02:24:27,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:24:31,100 INFO L124 PetriNetUnfolderBase]: 38509/56102 cut-off events. [2025-03-04 02:24:31,100 INFO L125 PetriNetUnfolderBase]: For 100048/100051 co-relation queries the response was YES. [2025-03-04 02:24:31,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185806 conditions, 56102 events. 38509/56102 cut-off events. For 100048/100051 co-relation queries the response was YES. Maximal size of possible extension queue 2355. Compared 407174 event pairs, 3026 based on Foata normal form. 1814/57890 useless extension candidates. Maximal degree in co-relation 162509. Up to 21329 conditions per place. [2025-03-04 02:24:31,573 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 258 selfloop transitions, 68 changer transitions 7/342 dead transitions. [2025-03-04 02:24:31,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 342 transitions, 2769 flow [2025-03-04 02:24:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 02:24:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-04 02:24:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 277 transitions. [2025-03-04 02:24:31,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6155555555555555 [2025-03-04 02:24:31,574 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 665 flow. Second operand 9 states and 277 transitions. [2025-03-04 02:24:31,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 342 transitions, 2769 flow [2025-03-04 02:24:32,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 342 transitions, 2753 flow, removed 8 selfloop flow, removed 0 redundant places. [2025-03-04 02:24:32,277 INFO L231 Difference]: Finished difference. Result has 101 places, 174 transitions, 1507 flow [2025-03-04 02:24:32,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1507, PETRI_PLACES=101, PETRI_TRANSITIONS=174} [2025-03-04 02:24:32,278 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2025-03-04 02:24:32,278 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 174 transitions, 1507 flow [2025-03-04 02:24:32,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2025-03-04 02:24:32,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:32,278 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] [2025-03-04 02:24:32,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-04 02:24:32,278 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-04 02:24:32,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1752429992, now seen corresponding path program 3 times [2025-03-04 02:24:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:32,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224952732] [2025-03-04 02:24:32,279 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:24:32,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:32,288 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 2 equivalence classes. [2025-03-04 02:24:32,297 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 36 of 37 statements. [2025-03-04 02:24:32,298 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-04 02:24:32,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:24:32,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:32,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224952732] [2025-03-04 02:24:32,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224952732] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:32,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:32,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-04 02:24:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463900538] [2025-03-04 02:24:32,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:32,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-04 02:24:32,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:32,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-04 02:24:32,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-04 02:24:32,707 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-04 02:24:32,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 174 transitions, 1507 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 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) [2025-03-04 02:24:32,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:32,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-04 02:24:32,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:24:39,073 INFO L124 PetriNetUnfolderBase]: 53767/77817 cut-off events. [2025-03-04 02:24:39,073 INFO L125 PetriNetUnfolderBase]: For 213043/213342 co-relation queries the response was YES. [2025-03-04 02:24:39,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297796 conditions, 77817 events. 53767/77817 cut-off events. For 213043/213342 co-relation queries the response was YES. Maximal size of possible extension queue 3095. Compared 577008 event pairs, 10940 based on Foata normal form. 508/78294 useless extension candidates. Maximal degree in co-relation 250185. Up to 55810 conditions per place. [2025-03-04 02:24:39,777 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 326 selfloop transitions, 56 changer transitions 11/404 dead transitions. [2025-03-04 02:24:39,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 404 transitions, 3946 flow [2025-03-04 02:24:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 02:24:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-04 02:24:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 275 transitions. [2025-03-04 02:24:39,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2025-03-04 02:24:39,778 INFO L175 Difference]: Start difference. First operand has 101 places, 174 transitions, 1507 flow. Second operand 9 states and 275 transitions. [2025-03-04 02:24:39,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 404 transitions, 3946 flow [2025-03-04 02:24:42,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 404 transitions, 3946 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-04 02:24:42,078 INFO L231 Difference]: Finished difference. Result has 116 places, 226 transitions, 2316 flow [2025-03-04 02:24:42,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2316, PETRI_PLACES=116, PETRI_TRANSITIONS=226} [2025-03-04 02:24:42,079 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 64 predicate places. [2025-03-04 02:24:42,079 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 226 transitions, 2316 flow [2025-03-04 02:24:42,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 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) [2025-03-04 02:24:42,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:42,079 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] [2025-03-04 02:24:42,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-04 02:24:42,079 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-04 02:24:42,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash 747344076, now seen corresponding path program 4 times [2025-03-04 02:24:42,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:42,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338135798] [2025-03-04 02:24:42,080 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:24:42,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:42,087 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-04 02:24:42,096 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 02:24:42,097 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:24:42,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 02:24:42,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:42,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338135798] [2025-03-04 02:24:42,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338135798] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:42,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:42,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 02:24:42,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922309866] [2025-03-04 02:24:42,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:42,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 02:24:42,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:42,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 02:24:42,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-04 02:24:42,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-04 02:24:42,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 226 transitions, 2316 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2025-03-04 02:24:42,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:42,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-04 02:24:42,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:24:53,902 INFO L124 PetriNetUnfolderBase]: 86561/126465 cut-off events. [2025-03-04 02:24:53,902 INFO L125 PetriNetUnfolderBase]: For 459476/459925 co-relation queries the response was YES. [2025-03-04 02:24:54,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528498 conditions, 126465 events. 86561/126465 cut-off events. For 459476/459925 co-relation queries the response was YES. Maximal size of possible extension queue 5291. Compared 1005191 event pairs, 16652 based on Foata normal form. 2840/129233 useless extension candidates. Maximal degree in co-relation 501692. Up to 65104 conditions per place. [2025-03-04 02:24:55,247 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 475 selfloop transitions, 217 changer transitions 9/712 dead transitions. [2025-03-04 02:24:55,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 712 transitions, 8148 flow [2025-03-04 02:24:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 02:24:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 02:24:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 348 transitions. [2025-03-04 02:24:55,249 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6327272727272727 [2025-03-04 02:24:55,249 INFO L175 Difference]: Start difference. First operand has 116 places, 226 transitions, 2316 flow. Second operand 11 states and 348 transitions. [2025-03-04 02:24:55,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 712 transitions, 8148 flow