./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.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-bad-buffer-mult-alt2.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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 02:21:58,425 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 02:21:58,496 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-04 02:21:58,499 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 02:21:58,500 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 02:21:58,514 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 02:21:58,515 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 02:21:58,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 02:21:58,515 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 02:21:58,515 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 02:21:58,515 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 02:21:58,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 02:21:58,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 02:21:58,516 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 02:21:58,516 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 02:21:58,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 02:21:58,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 02:21:58,516 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 02:21:58,516 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 02:21:58,516 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 02:21:58,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 02:21:58,517 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 02:21:58,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 02:21:58,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 02:21:58,517 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 02:21:58,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 02:21:58,517 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 02:21:58,517 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 02:21:58,517 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 02:21:58,517 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 02:21:58,517 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 02:21:58,518 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 02:21:58,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:21:58,518 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 02:21:58,518 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 02:21:58,518 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 02:21:58,518 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 02:21:58,518 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 02:21:58,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 02:21:58,518 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 02:21:58,518 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 02:21:58,519 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 02:21:58,519 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 02:21:58,519 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 -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2025-03-04 02:21:58,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 02:21:58,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 02:21:58,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 02:21:58,749 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 02:21:58,749 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 02:21:58,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-03-04 02:21:59,911 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/620279749/549f5e5dceab40298c17ec2789b01fb3/FLAGb3ec6aa7f [2025-03-04 02:22:00,198 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 02:22:00,198 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-03-04 02:22:00,206 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/620279749/549f5e5dceab40298c17ec2789b01fb3/FLAGb3ec6aa7f [2025-03-04 02:22:00,485 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/620279749/549f5e5dceab40298c17ec2789b01fb3 [2025-03-04 02:22:00,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 02:22:00,488 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 02:22:00,489 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 02:22:00,489 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 02:22:00,492 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 02:22:00,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f596780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00, skipping insertion in model container [2025-03-04 02:22:00,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,507 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 02:22:00,631 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-bad-buffer-mult-alt2.wvr.c[4226,4239] [2025-03-04 02:22:00,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:22:00,653 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 02:22:00,672 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-bad-buffer-mult-alt2.wvr.c[4226,4239] [2025-03-04 02:22:00,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:22:00,694 INFO L204 MainTranslator]: Completed translation [2025-03-04 02:22:00,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00 WrapperNode [2025-03-04 02:22:00,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 02:22:00,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 02:22:00,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 02:22:00,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 02:22:00,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,731 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 289 [2025-03-04 02:22:00,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 02:22:00,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 02:22:00,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 02:22:00,735 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 02:22:00,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,743 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,764 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 02:22:00,764 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,764 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,774 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,779 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,781 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,783 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 02:22:00,787 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 02:22:00,787 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 02:22:00,787 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 02:22:00,787 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (1/1) ... [2025-03-04 02:22:00,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:22:00,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:00,811 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 02:22:00,813 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 02:22:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 02:22:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 02:22:00,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 02:22:00,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 02:22:00,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 02:22:00,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-04 02:22:00,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-04 02:22:00,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-04 02:22:00,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-04 02:22:00,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 02:22:00,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 02:22:00,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 02:22:00,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 02:22:00,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-04 02:22:00,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-04 02:22:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 02:22:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 02:22:00,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 02:22:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 02:22:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 02:22:00,837 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 02:22:00,945 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 02:22:00,946 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 02:22:01,303 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 02:22:01,303 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 02:22:01,572 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 02:22:01,573 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 02:22:01,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:22:01 BoogieIcfgContainer [2025-03-04 02:22:01,574 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 02:22:01,576 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 02:22:01,576 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 02:22:01,579 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 02:22:01,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 02:22:00" (1/3) ... [2025-03-04 02:22:01,580 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73df2b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:22:01, skipping insertion in model container [2025-03-04 02:22:01,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:00" (2/3) ... [2025-03-04 02:22:01,580 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73df2b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:22:01, skipping insertion in model container [2025-03-04 02:22:01,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:22:01" (3/3) ... [2025-03-04 02:22:01,581 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2025-03-04 02:22:01,593 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 02:22:01,594 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt2.wvr.c that has 5 procedures, 43 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-04 02:22:01,594 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 02:22:01,653 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-04 02:22:01,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 124 flow [2025-03-04 02:22:01,708 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2025-03-04 02:22:01,711 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 02:22:01,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 44 events. 6/44 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2025-03-04 02:22:01,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 48 transitions, 124 flow [2025-03-04 02:22:01,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 110 flow [2025-03-04 02:22:01,731 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:22:01,740 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;@52ea6f62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:22:01,742 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-04 02:22:01,757 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:22:01,757 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2025-03-04 02:22:01,757 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 02:22:01,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:01,758 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 02:22:01,758 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 02:22:01,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:01,763 INFO L85 PathProgramCache]: Analyzing trace with hash -417808382, now seen corresponding path program 1 times [2025-03-04 02:22:01,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:01,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806479491] [2025-03-04 02:22:01,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:01,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:01,830 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-04 02:22:01,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-04 02:22:01,896 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:01,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:02,313 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 02:22:02,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:02,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806479491] [2025-03-04 02:22:02,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806479491] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:02,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:22:02,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 02:22:02,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123449571] [2025-03-04 02:22:02,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:02,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 02:22:02,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:02,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 02:22:02,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 02:22:02,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 02:22:02,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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 02:22:02,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:02,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 02:22:02,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:03,095 INFO L124 PetriNetUnfolderBase]: 4291/6050 cut-off events. [2025-03-04 02:22:03,095 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2025-03-04 02:22:03,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12139 conditions, 6050 events. 4291/6050 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31106 event pairs, 560 based on Foata normal form. 280/6287 useless extension candidates. Maximal degree in co-relation 10585. Up to 2701 conditions per place. [2025-03-04 02:22:03,138 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 78 selfloop transitions, 6 changer transitions 6/99 dead transitions. [2025-03-04 02:22:03,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 99 transitions, 435 flow [2025-03-04 02:22:03,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 02:22:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 02:22:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2025-03-04 02:22:03,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2025-03-04 02:22:03,153 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 110 flow. Second operand 6 states and 170 transitions. [2025-03-04 02:22:03,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 99 transitions, 435 flow [2025-03-04 02:22:03,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 99 transitions, 397 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-04 02:22:03,172 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 133 flow [2025-03-04 02:22:03,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2025-03-04 02:22:03,176 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2025-03-04 02:22:03,176 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 133 flow [2025-03-04 02:22:03,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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 02:22:03,177 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:03,177 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 02:22:03,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 02:22:03,177 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 02:22:03,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:03,178 INFO L85 PathProgramCache]: Analyzing trace with hash 594696050, now seen corresponding path program 1 times [2025-03-04 02:22:03,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:03,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385328954] [2025-03-04 02:22:03,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:03,203 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-04 02:22:03,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-04 02:22:03,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:03,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:03,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:03,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385328954] [2025-03-04 02:22:03,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385328954] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:03,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382792861] [2025-03-04 02:22:03,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:03,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:03,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:03,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:03,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 02:22:03,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-04 02:22:03,521 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-04 02:22:03,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:03,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:03,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 02:22:03,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:03,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:03,892 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 02:22:03,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382792861] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:03,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-04 02:22:03,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 15 [2025-03-04 02:22:03,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815194453] [2025-03-04 02:22:03,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:03,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-04 02:22:03,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:03,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-04 02:22:03,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-04 02:22:03,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-03-04 02:22:03,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 133 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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 02:22:03,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:03,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-03-04 02:22:03,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:05,063 INFO L124 PetriNetUnfolderBase]: 10955/14405 cut-off events. [2025-03-04 02:22:05,063 INFO L125 PetriNetUnfolderBase]: For 3801/3811 co-relation queries the response was YES. [2025-03-04 02:22:05,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33032 conditions, 14405 events. 10955/14405 cut-off events. For 3801/3811 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 72491 event pairs, 1614 based on Foata normal form. 186/13732 useless extension candidates. Maximal degree in co-relation 14508. Up to 4280 conditions per place. [2025-03-04 02:22:05,178 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 94 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2025-03-04 02:22:05,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 113 transitions, 515 flow [2025-03-04 02:22:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 02:22:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 02:22:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2025-03-04 02:22:05,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-04 02:22:05,180 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 133 flow. Second operand 6 states and 168 transitions. [2025-03-04 02:22:05,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 113 transitions, 515 flow [2025-03-04 02:22:05,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 113 transitions, 509 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 02:22:05,191 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 216 flow [2025-03-04 02:22:05,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-03-04 02:22:05,192 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2025-03-04 02:22:05,192 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 216 flow [2025-03-04 02:22:05,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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 02:22:05,192 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:05,192 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] [2025-03-04 02:22:05,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-04 02:22:05,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:05,397 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 02:22:05,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:05,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1014971022, now seen corresponding path program 1 times [2025-03-04 02:22:05,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:05,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868217150] [2025-03-04 02:22:05,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:05,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:05,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-04 02:22:05,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-04 02:22:05,454 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:05,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:05,552 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 02:22:05,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:05,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868217150] [2025-03-04 02:22:05,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868217150] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:05,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:22:05,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 02:22:05,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298476061] [2025-03-04 02:22:05,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:05,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:22:05,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:05,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:22:05,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 02:22:05,553 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 02:22:05,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 02:22:05,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:05,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 02:22:05,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:06,381 INFO L124 PetriNetUnfolderBase]: 8139/11356 cut-off events. [2025-03-04 02:22:06,381 INFO L125 PetriNetUnfolderBase]: For 13845/13983 co-relation queries the response was YES. [2025-03-04 02:22:06,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30121 conditions, 11356 events. 8139/11356 cut-off events. For 13845/13983 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 62600 event pairs, 5672 based on Foata normal form. 261/11427 useless extension candidates. Maximal degree in co-relation 12518. Up to 9620 conditions per place. [2025-03-04 02:22:06,428 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 43 selfloop transitions, 2 changer transitions 24/80 dead transitions. [2025-03-04 02:22:06,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 419 flow [2025-03-04 02:22:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 02:22:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 02:22:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2025-03-04 02:22:06,430 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-03-04 02:22:06,430 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 216 flow. Second operand 5 states and 126 transitions. [2025-03-04 02:22:06,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 419 flow [2025-03-04 02:22:06,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 415 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-04 02:22:06,444 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 235 flow [2025-03-04 02:22:06,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2025-03-04 02:22:06,445 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2025-03-04 02:22:06,445 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 235 flow [2025-03-04 02:22:06,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 02:22:06,445 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:06,445 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 02:22:06,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 02:22:06,446 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 02:22:06,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash 270531823, now seen corresponding path program 1 times [2025-03-04 02:22:06,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:06,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417979674] [2025-03-04 02:22:06,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:06,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:06,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-04 02:22:06,487 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-04 02:22:06,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:06,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:07,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:07,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417979674] [2025-03-04 02:22:07,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417979674] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:07,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721980173] [2025-03-04 02:22:07,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:07,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:07,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:07,322 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:07,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 02:22:07,394 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-04 02:22:07,428 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-04 02:22:07,428 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:07,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:07,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-04 02:22:07,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:07,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-04 02:22:07,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-04 02:22:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:07,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:08,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2025-03-04 02:22:08,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2025-03-04 02:22:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:08,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721980173] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:08,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:08,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-03-04 02:22:08,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562869145] [2025-03-04 02:22:08,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:08,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:22:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:08,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:22:08,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:22:08,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 02:22:08,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 235 flow. Second operand has 18 states, 18 states have (on average 16.166666666666668) internal successors, (291), 18 states have internal predecessors, (291), 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 02:22:08,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:08,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 02:22:08,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:11,611 INFO L124 PetriNetUnfolderBase]: 27003/37991 cut-off events. [2025-03-04 02:22:11,613 INFO L125 PetriNetUnfolderBase]: For 41495/41693 co-relation queries the response was YES. [2025-03-04 02:22:11,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102244 conditions, 37991 events. 27003/37991 cut-off events. For 41495/41693 co-relation queries the response was YES. Maximal size of possible extension queue 1408. Compared 246622 event pairs, 6289 based on Foata normal form. 212/37898 useless extension candidates. Maximal degree in co-relation 102225. Up to 11639 conditions per place. [2025-03-04 02:22:11,990 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 253 selfloop transitions, 49 changer transitions 15/328 dead transitions. [2025-03-04 02:22:11,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 328 transitions, 1875 flow [2025-03-04 02:22:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-04 02:22:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-04 02:22:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 546 transitions. [2025-03-04 02:22:11,993 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.56875 [2025-03-04 02:22:11,993 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 235 flow. Second operand 20 states and 546 transitions. [2025-03-04 02:22:11,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 328 transitions, 1875 flow [2025-03-04 02:22:12,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 328 transitions, 1839 flow, removed 17 selfloop flow, removed 2 redundant places. [2025-03-04 02:22:12,041 INFO L231 Difference]: Finished difference. Result has 82 places, 106 transitions, 645 flow [2025-03-04 02:22:12,041 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=645, PETRI_PLACES=82, PETRI_TRANSITIONS=106} [2025-03-04 02:22:12,041 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2025-03-04 02:22:12,041 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 106 transitions, 645 flow [2025-03-04 02:22:12,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.166666666666668) internal successors, (291), 18 states have internal predecessors, (291), 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 02:22:12,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:12,042 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 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 02:22:12,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 02:22:12,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-04 02:22:12,242 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 02:22:12,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:12,243 INFO L85 PathProgramCache]: Analyzing trace with hash 756954354, now seen corresponding path program 1 times [2025-03-04 02:22:12,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:12,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475645010] [2025-03-04 02:22:12,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:12,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:12,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-04 02:22:12,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-04 02:22:12,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:12,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:13,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:13,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475645010] [2025-03-04 02:22:13,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475645010] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:13,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787989125] [2025-03-04 02:22:13,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:13,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:13,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:13,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:13,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 02:22:13,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-04 02:22:13,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-04 02:22:13,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:13,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:13,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 02:22:13,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:13,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2025-03-04 02:22:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 02:22:13,544 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 02:22:13,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787989125] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:13,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 02:22:13,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2025-03-04 02:22:13,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144802551] [2025-03-04 02:22:13,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:13,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 02:22:13,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:13,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 02:22:13,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-04 02:22:13,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 02:22:13,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 106 transitions, 645 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 02:22:13,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:13,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 02:22:13,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:18,318 INFO L124 PetriNetUnfolderBase]: 49304/69542 cut-off events. [2025-03-04 02:22:18,318 INFO L125 PetriNetUnfolderBase]: For 98040/98781 co-relation queries the response was YES. [2025-03-04 02:22:18,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196589 conditions, 69542 events. 49304/69542 cut-off events. For 98040/98781 co-relation queries the response was YES. Maximal size of possible extension queue 2680. Compared 488254 event pairs, 4547 based on Foata normal form. 323/69518 useless extension candidates. Maximal degree in co-relation 165092. Up to 26529 conditions per place. [2025-03-04 02:22:18,857 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 132 selfloop transitions, 60 changer transitions 4/207 dead transitions. [2025-03-04 02:22:18,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 207 transitions, 1469 flow [2025-03-04 02:22:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 02:22:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 02:22:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2025-03-04 02:22:18,859 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-04 02:22:18,859 INFO L175 Difference]: Start difference. First operand has 82 places, 106 transitions, 645 flow. Second operand 6 states and 192 transitions. [2025-03-04 02:22:18,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 207 transitions, 1469 flow [2025-03-04 02:22:19,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 207 transitions, 1423 flow, removed 22 selfloop flow, removed 2 redundant places. [2025-03-04 02:22:19,321 INFO L231 Difference]: Finished difference. Result has 88 places, 133 transitions, 1021 flow [2025-03-04 02:22:19,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1021, PETRI_PLACES=88, PETRI_TRANSITIONS=133} [2025-03-04 02:22:19,322 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2025-03-04 02:22:19,322 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 133 transitions, 1021 flow [2025-03-04 02:22:19,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 02:22:19,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:19,322 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:19,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 02:22:19,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:19,528 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 02:22:19,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1054028639, now seen corresponding path program 1 times [2025-03-04 02:22:19,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:19,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015506272] [2025-03-04 02:22:19,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:19,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:19,541 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-04 02:22:19,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-04 02:22:19,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:19,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:19,614 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 02:22:19,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:19,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015506272] [2025-03-04 02:22:19,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015506272] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:19,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:22:19,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 02:22:19,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982228998] [2025-03-04 02:22:19,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:19,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 02:22:19,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:19,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 02:22:19,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 02:22:19,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 02:22:19,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 133 transitions, 1021 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 02:22:19,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:19,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 02:22:19,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:27,225 INFO L124 PetriNetUnfolderBase]: 68609/98495 cut-off events. [2025-03-04 02:22:27,225 INFO L125 PetriNetUnfolderBase]: For 242102/244011 co-relation queries the response was YES. [2025-03-04 02:22:27,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294632 conditions, 98495 events. 68609/98495 cut-off events. For 242102/244011 co-relation queries the response was YES. Maximal size of possible extension queue 3601. Compared 744270 event pairs, 23910 based on Foata normal form. 2642/100559 useless extension candidates. Maximal degree in co-relation 246460. Up to 51721 conditions per place. [2025-03-04 02:22:28,061 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 184 selfloop transitions, 7 changer transitions 0/202 dead transitions. [2025-03-04 02:22:28,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 202 transitions, 2046 flow [2025-03-04 02:22:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 02:22:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 02:22:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-03-04 02:22:28,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-04 02:22:28,062 INFO L175 Difference]: Start difference. First operand has 88 places, 133 transitions, 1021 flow. Second operand 3 states and 96 transitions. [2025-03-04 02:22:28,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 202 transitions, 2046 flow [2025-03-04 02:22:28,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 202 transitions, 2034 flow, removed 6 selfloop flow, removed 0 redundant places. [2025-03-04 02:22:28,639 INFO L231 Difference]: Finished difference. Result has 91 places, 134 transitions, 1086 flow [2025-03-04 02:22:28,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1086, PETRI_PLACES=91, PETRI_TRANSITIONS=134} [2025-03-04 02:22:28,640 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2025-03-04 02:22:28,640 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 134 transitions, 1086 flow [2025-03-04 02:22:28,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 02:22:28,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:28,640 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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 02:22:28,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-04 02:22:28,641 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 02:22:28,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:28,641 INFO L85 PathProgramCache]: Analyzing trace with hash -261966820, now seen corresponding path program 2 times [2025-03-04 02:22:28,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:28,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249870831] [2025-03-04 02:22:28,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:22:28,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:28,652 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-04 02:22:28,671 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-04 02:22:28,671 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:28,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:28,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:28,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249870831] [2025-03-04 02:22:28,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249870831] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:28,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:22:28,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 02:22:28,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867544963] [2025-03-04 02:22:28,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:28,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:22:28,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:28,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:22:28,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-04 02:22:28,768 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 02:22:28,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 134 transitions, 1086 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 02:22:28,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:28,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 02:22:28,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand