./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 735b3cc8 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-735b3cc-m [2025-03-14 01:07:00,582 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 01:07:00,644 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 01:07:00,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 01:07:00,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 01:07:00,670 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 01:07:00,671 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 01:07:00,671 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 01:07:00,671 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 01:07:00,671 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 01:07:00,671 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 01:07:00,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 01:07:00,672 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 01:07:00,673 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 01:07:00,673 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 01:07:00,674 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 01:07:00,674 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 01:07:00,674 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 01:07:00,674 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 01:07:00,674 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 01:07:00,674 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 01:07:00,674 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 01:07:00,674 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 01:07:00,675 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 01:07:00,675 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 01:07:00,675 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 01:07:00,675 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 01:07:00,675 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 01:07:00,675 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 01:07:00,675 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 01:07:00,675 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 01:07:00,676 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 01:07:00,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:07:00,676 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 01:07:00,676 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 01:07:00,676 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 01:07:00,676 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 01:07:00,676 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 01:07:00,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 01:07:00,677 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 01:07:00,677 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 01:07:00,677 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 01:07:00,677 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 01:07:00,677 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 [2025-03-14 01:07:00,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 01:07:00,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 01:07:00,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 01:07:00,916 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 01:07:00,916 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 01:07:00,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2025-03-14 01:07:02,094 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c45b78bd/20d3ef67e0e549e5aa566ffd8e2f2d71/FLAGcf18c8eb8 [2025-03-14 01:07:02,323 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 01:07:02,324 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2025-03-14 01:07:02,332 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c45b78bd/20d3ef67e0e549e5aa566ffd8e2f2d71/FLAGcf18c8eb8 [2025-03-14 01:07:02,349 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c45b78bd/20d3ef67e0e549e5aa566ffd8e2f2d71 [2025-03-14 01:07:02,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 01:07:02,353 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 01:07:02,354 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 01:07:02,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 01:07:02,358 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 01:07:02,359 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f84ee8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02, skipping insertion in model container [2025-03-14 01:07:02,360 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,377 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 01:07:02,526 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] [2025-03-14 01:07:02,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:07:02,541 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 01:07:02,560 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] [2025-03-14 01:07:02,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:07:02,580 INFO L204 MainTranslator]: Completed translation [2025-03-14 01:07:02,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02 WrapperNode [2025-03-14 01:07:02,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 01:07:02,583 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 01:07:02,583 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 01:07:02,583 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 01:07:02,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,592 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,612 INFO L138 Inliner]: procedures = 26, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 278 [2025-03-14 01:07:02,613 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 01:07:02,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 01:07:02,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 01:07:02,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 01:07:02,619 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,622 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,641 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]. [2025-03-14 01:07:02,642 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,642 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,647 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,648 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,649 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,651 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 01:07:02,654 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 01:07:02,654 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 01:07:02,654 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 01:07:02,655 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:07:02,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:02,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-14 01:07:02,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-14 01:07:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 01:07:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-14 01:07:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-14 01:07:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-14 01:07:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-14 01:07:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-14 01:07:02,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-14 01:07:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-14 01:07:02,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-14 01:07:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-14 01:07:02,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-14 01:07:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-14 01:07:02,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-14 01:07:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 01:07:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-14 01:07:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-14 01:07:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-14 01:07:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-14 01:07:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 01:07:02,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 01:07:02,697 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 01:07:02,783 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 01:07:02,785 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 01:07:03,185 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 01:07:03,186 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 01:07:03,186 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 01:07:03,506 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 01:07:03,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:07:03 BoogieIcfgContainer [2025-03-14 01:07:03,506 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 01:07:03,508 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 01:07:03,508 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 01:07:03,511 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 01:07:03,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 01:07:02" (1/3) ... [2025-03-14 01:07:03,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad0bf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:07:03, skipping insertion in model container [2025-03-14 01:07:03,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02" (2/3) ... [2025-03-14 01:07:03,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad0bf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:07:03, skipping insertion in model container [2025-03-14 01:07:03,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:07:03" (3/3) ... [2025-03-14 01:07:03,512 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2025-03-14 01:07:03,524 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 01:07:03,525 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. [2025-03-14 01:07:03,526 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 01:07:03,575 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-14 01:07:03,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 50 transitions, 128 flow [2025-03-14 01:07:03,622 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2025-03-14 01:07:03,624 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-14 01:07:03,628 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. [2025-03-14 01:07:03,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 50 transitions, 128 flow [2025-03-14 01:07:03,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 45 transitions, 114 flow [2025-03-14 01:07:03,639 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 01:07:03,649 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;@66b520cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 01:07:03,650 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-14 01:07:03,689 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 01:07:03,689 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2025-03-14 01:07:03,689 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-14 01:07:03,689 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:03,690 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] [2025-03-14 01:07:03,690 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)] === [2025-03-14 01:07:03,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:03,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2018356736, now seen corresponding path program 1 times [2025-03-14 01:07:03,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:03,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444081381] [2025-03-14 01:07:03,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:03,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:03,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-14 01:07:03,800 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-14 01:07:03,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:03,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:03,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:03,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444081381] [2025-03-14 01:07:03,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444081381] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:03,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:03,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:07:03,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996964536] [2025-03-14 01:07:03,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:03,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:07:03,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:03,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:07:03,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:07:03,979 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-14 01:07:03,981 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) [2025-03-14 01:07:03,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:03,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-14 01:07:03,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:04,793 INFO L124 PetriNetUnfolderBase]: 5628/7732 cut-off events. [2025-03-14 01:07:04,794 INFO L125 PetriNetUnfolderBase]: For 490/490 co-relation queries the response was YES. [2025-03-14 01:07:04,815 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. [2025-03-14 01:07:04,855 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 55 selfloop transitions, 3 changer transitions 1/68 dead transitions. [2025-03-14 01:07:04,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 293 flow [2025-03-14 01:07:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:07:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:07:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2025-03-14 01:07:04,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2025-03-14 01:07:04,866 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 114 flow. Second operand 3 states and 99 transitions. [2025-03-14 01:07:04,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 293 flow [2025-03-14 01:07:04,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 267 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-14 01:07:04,877 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 117 flow [2025-03-14 01:07:04,879 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} [2025-03-14 01:07:04,881 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2025-03-14 01:07:04,882 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 117 flow [2025-03-14 01:07:04,882 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) [2025-03-14 01:07:04,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:04,883 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] [2025-03-14 01:07:04,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 01:07:04,883 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)] === [2025-03-14 01:07:04,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash 227300240, now seen corresponding path program 1 times [2025-03-14 01:07:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:04,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395841933] [2025-03-14 01:07:04,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:04,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:04,901 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-14 01:07:04,936 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-14 01:07:04,936 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:04,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:05,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:05,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395841933] [2025-03-14 01:07:05,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395841933] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:05,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:05,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:07:05,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748126477] [2025-03-14 01:07:05,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:05,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:07:05,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:05,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:07:05,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:07:05,083 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-14 01:07:05,084 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) [2025-03-14 01:07:05,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:05,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-14 01:07:05,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:05,793 INFO L124 PetriNetUnfolderBase]: 6878/9587 cut-off events. [2025-03-14 01:07:05,793 INFO L125 PetriNetUnfolderBase]: For 1240/1240 co-relation queries the response was YES. [2025-03-14 01:07:05,804 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. [2025-03-14 01:07:05,838 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 62 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2025-03-14 01:07:05,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 73 transitions, 311 flow [2025-03-14 01:07:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:07:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:07:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2025-03-14 01:07:05,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2025-03-14 01:07:05,840 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 117 flow. Second operand 3 states and 101 transitions. [2025-03-14 01:07:05,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 73 transitions, 311 flow [2025-03-14 01:07:05,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 73 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:05,842 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 128 flow [2025-03-14 01:07:05,842 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} [2025-03-14 01:07:05,842 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2025-03-14 01:07:05,843 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 128 flow [2025-03-14 01:07:05,843 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) [2025-03-14 01:07:05,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:05,843 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] [2025-03-14 01:07:05,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-14 01:07:05,843 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)] === [2025-03-14 01:07:05,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:05,844 INFO L85 PathProgramCache]: Analyzing trace with hash -815174038, now seen corresponding path program 1 times [2025-03-14 01:07:05,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:05,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284008551] [2025-03-14 01:07:05,844 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:05,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:05,859 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-14 01:07:05,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-14 01:07:05,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:05,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:05,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284008551] [2025-03-14 01:07:05,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284008551] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:05,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:05,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:07:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306628335] [2025-03-14 01:07:05,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:05,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:07:05,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:05,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:07:05,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:07:05,976 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-14 01:07:05,977 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) [2025-03-14 01:07:05,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:05,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-14 01:07:05,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:06,713 INFO L124 PetriNetUnfolderBase]: 8266/11678 cut-off events. [2025-03-14 01:07:06,713 INFO L125 PetriNetUnfolderBase]: For 3103/3103 co-relation queries the response was YES. [2025-03-14 01:07:06,725 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. [2025-03-14 01:07:06,760 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 62 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2025-03-14 01:07:06,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 327 flow [2025-03-14 01:07:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:07:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:07:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2025-03-14 01:07:06,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2025-03-14 01:07:06,765 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 128 flow. Second operand 3 states and 99 transitions. [2025-03-14 01:07:06,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 327 flow [2025-03-14 01:07:06,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:06,770 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 140 flow [2025-03-14 01:07:06,770 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} [2025-03-14 01:07:06,770 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2025-03-14 01:07:06,771 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 140 flow [2025-03-14 01:07:06,771 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) [2025-03-14 01:07:06,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:06,771 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] [2025-03-14 01:07:06,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-14 01:07:06,771 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)] === [2025-03-14 01:07:06,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1051624197, now seen corresponding path program 1 times [2025-03-14 01:07:06,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:06,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949775975] [2025-03-14 01:07:06,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:06,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:06,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-14 01:07:06,803 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-14 01:07:06,805 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:06,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:06,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:06,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949775975] [2025-03-14 01:07:06,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949775975] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:06,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:06,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 01:07:06,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420981151] [2025-03-14 01:07:06,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:06,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:07:06,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:06,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:07:06,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:07:06,927 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-14 01:07:06,927 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) [2025-03-14 01:07:06,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:06,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-14 01:07:06,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:07,755 INFO L124 PetriNetUnfolderBase]: 10570/15235 cut-off events. [2025-03-14 01:07:07,756 INFO L125 PetriNetUnfolderBase]: For 5582/5582 co-relation queries the response was YES. [2025-03-14 01:07:07,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34141 conditions, 15235 events. 10570/15235 cut-off events. For 5582/5582 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 91895 event pairs, 8770 based on Foata normal form. 255/15391 useless extension candidates. Maximal degree in co-relation 16859. Up to 10988 conditions per place. [2025-03-14 01:07:07,815 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 69 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2025-03-14 01:07:07,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 371 flow [2025-03-14 01:07:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:07:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:07:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2025-03-14 01:07:07,817 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.595 [2025-03-14 01:07:07,817 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 140 flow. Second operand 4 states and 119 transitions. [2025-03-14 01:07:07,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 371 flow [2025-03-14 01:07:07,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 81 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:07,820 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 158 flow [2025-03-14 01:07:07,820 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=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2025-03-14 01:07:07,821 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2025-03-14 01:07:07,821 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 158 flow [2025-03-14 01:07:07,821 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) [2025-03-14 01:07:07,821 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:07,821 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] [2025-03-14 01:07:07,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-14 01:07:07,822 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)] === [2025-03-14 01:07:07,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:07,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1896841679, now seen corresponding path program 1 times [2025-03-14 01:07:07,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:07,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607104800] [2025-03-14 01:07:07,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:07,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:07,832 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-14 01:07:07,845 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-14 01:07:07,845 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:07,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:07,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:07,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607104800] [2025-03-14 01:07:07,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607104800] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:07,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:07,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:07:07,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116395338] [2025-03-14 01:07:07,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:07,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:07:07,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:07,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:07:07,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:07:07,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-14 01:07:07,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 158 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) [2025-03-14 01:07:07,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:07,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-14 01:07:07,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:09,029 INFO L124 PetriNetUnfolderBase]: 13578/19775 cut-off events. [2025-03-14 01:07:09,029 INFO L125 PetriNetUnfolderBase]: For 7328/7328 co-relation queries the response was YES. [2025-03-14 01:07:09,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43728 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 126209 event pairs, 11518 based on Foata normal form. 385/20045 useless extension candidates. Maximal degree in co-relation 34596. Up to 14202 conditions per place. [2025-03-14 01:07:09,102 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 68 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2025-03-14 01:07:09,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 386 flow [2025-03-14 01:07:09,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:07:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:07:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2025-03-14 01:07:09,104 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.585 [2025-03-14 01:07:09,104 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 158 flow. Second operand 4 states and 117 transitions. [2025-03-14 01:07:09,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 386 flow [2025-03-14 01:07:09,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:09,108 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 177 flow [2025-03-14 01:07:09,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2025-03-14 01:07:09,110 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2025-03-14 01:07:09,110 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 177 flow [2025-03-14 01:07:09,110 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) [2025-03-14 01:07:09,110 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:09,111 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] [2025-03-14 01:07:09,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-14 01:07:09,111 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)] === [2025-03-14 01:07:09,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:09,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1013309648, now seen corresponding path program 1 times [2025-03-14 01:07:09,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:09,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861171825] [2025-03-14 01:07:09,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:09,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:09,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-14 01:07:09,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-14 01:07:09,140 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:09,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:09,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:09,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861171825] [2025-03-14 01:07:09,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861171825] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:09,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:09,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:07:09,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405534065] [2025-03-14 01:07:09,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:09,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:07:09,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:09,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:07:09,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-14 01:07:09,448 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-14 01:07:09,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 177 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) [2025-03-14 01:07:09,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:09,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-14 01:07:09,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:11,265 INFO L124 PetriNetUnfolderBase]: 22288/31883 cut-off events. [2025-03-14 01:07:11,265 INFO L125 PetriNetUnfolderBase]: For 11408/11408 co-relation queries the response was YES. [2025-03-14 01:07:11,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71754 conditions, 31883 events. 22288/31883 cut-off events. For 11408/11408 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 208667 event pairs, 1198 based on Foata normal form. 640/30959 useless extension candidates. Maximal degree in co-relation 57544. Up to 13192 conditions per place. [2025-03-14 01:07:11,392 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 160 selfloop transitions, 15 changer transitions 3/186 dead transitions. [2025-03-14 01:07:11,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 186 transitions, 937 flow [2025-03-14 01:07:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:07:11,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:07:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2025-03-14 01:07:11,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6425 [2025-03-14 01:07:11,394 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 177 flow. Second operand 8 states and 257 transitions. [2025-03-14 01:07:11,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 186 transitions, 937 flow [2025-03-14 01:07:11,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 186 transitions, 932 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:11,399 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 271 flow [2025-03-14 01:07:11,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=271, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2025-03-14 01:07:11,400 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2025-03-14 01:07:11,400 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 271 flow [2025-03-14 01:07:11,400 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) [2025-03-14 01:07:11,400 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:11,400 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] [2025-03-14 01:07:11,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-14 01:07:11,402 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)] === [2025-03-14 01:07:11,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:11,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1273269406, now seen corresponding path program 2 times [2025-03-14 01:07:11,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:11,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022256203] [2025-03-14 01:07:11,402 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:07:11,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:11,415 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-14 01:07:11,432 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 32 of 37 statements. [2025-03-14 01:07:11,433 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-14 01:07:11,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-14 01:07:11,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022256203] [2025-03-14 01:07:11,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022256203] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:11,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:11,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:07:11,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911835586] [2025-03-14 01:07:11,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:11,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:07:11,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:11,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:07:11,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-14 01:07:11,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2025-03-14 01:07:11,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 271 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:11,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:11,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2025-03-14 01:07:11,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:15,235 INFO L124 PetriNetUnfolderBase]: 43979/60446 cut-off events. [2025-03-14 01:07:15,236 INFO L125 PetriNetUnfolderBase]: For 39310/39314 co-relation queries the response was YES. [2025-03-14 01:07:15,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159887 conditions, 60446 events. 43979/60446 cut-off events. For 39310/39314 co-relation queries the response was YES. Maximal size of possible extension queue 1985. Compared 388404 event pairs, 6289 based on Foata normal form. 458/57066 useless extension candidates. Maximal degree in co-relation 132752. Up to 35775 conditions per place. [2025-03-14 01:07:15,535 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 138 selfloop transitions, 18 changer transitions 8/172 dead transitions. [2025-03-14 01:07:15,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 172 transitions, 949 flow [2025-03-14 01:07:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:07:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:07:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2025-03-14 01:07:15,536 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2025-03-14 01:07:15,537 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 271 flow. Second operand 7 states and 212 transitions. [2025-03-14 01:07:15,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 172 transitions, 949 flow [2025-03-14 01:07:15,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 172 transitions, 949 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-14 01:07:15,726 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 424 flow [2025-03-14 01:07:15,727 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=424, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2025-03-14 01:07:15,727 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2025-03-14 01:07:15,727 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 424 flow [2025-03-14 01:07:15,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:15,727 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:15,727 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] [2025-03-14 01:07:15,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-14 01:07:15,727 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)] === [2025-03-14 01:07:15,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash -221046418, now seen corresponding path program 1 times [2025-03-14 01:07:15,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:15,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268312238] [2025-03-14 01:07:15,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:15,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:15,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-14 01:07:15,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-14 01:07:15,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:15,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:15,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:15,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268312238] [2025-03-14 01:07:15,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268312238] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:15,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:15,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:07:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072878125] [2025-03-14 01:07:15,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:15,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:07:15,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:15,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:07:15,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-14 01:07:16,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-14 01:07:16,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 424 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) [2025-03-14 01:07:16,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:16,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-14 01:07:16,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:20,091 INFO L124 PetriNetUnfolderBase]: 40861/59335 cut-off events. [2025-03-14 01:07:20,092 INFO L125 PetriNetUnfolderBase]: For 67084/67088 co-relation queries the response was YES. [2025-03-14 01:07:20,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176209 conditions, 59335 events. 40861/59335 cut-off events. For 67084/67088 co-relation queries the response was YES. Maximal size of possible extension queue 2184. Compared 430005 event pairs, 3818 based on Foata normal form. 0/56323 useless extension candidates. Maximal degree in co-relation 148082. Up to 44236 conditions per place. [2025-03-14 01:07:20,453 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 121 selfloop transitions, 10 changer transitions 8/154 dead transitions. [2025-03-14 01:07:20,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 154 transitions, 977 flow [2025-03-14 01:07:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:07:20,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:07:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2025-03-14 01:07:20,454 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2025-03-14 01:07:20,454 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 424 flow. Second operand 6 states and 176 transitions. [2025-03-14 01:07:20,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 154 transitions, 977 flow [2025-03-14 01:07:20,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 154 transitions, 963 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:20,917 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 509 flow [2025-03-14 01:07:20,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2025-03-14 01:07:20,918 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 38 predicate places. [2025-03-14 01:07:20,918 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 509 flow [2025-03-14 01:07:20,918 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) [2025-03-14 01:07:20,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:20,918 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] [2025-03-14 01:07:20,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-14 01:07:20,918 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)] === [2025-03-14 01:07:20,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1285851372, now seen corresponding path program 2 times [2025-03-14 01:07:20,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:20,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934926878] [2025-03-14 01:07:20,919 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:07:20,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:20,927 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-14 01:07:20,934 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 36 of 37 statements. [2025-03-14 01:07:20,935 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-14 01:07:20,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:21,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:21,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934926878] [2025-03-14 01:07:21,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934926878] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:21,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:21,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:07:21,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446472453] [2025-03-14 01:07:21,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:21,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:07:21,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:21,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:07:21,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-14 01:07:21,211 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-14 01:07:21,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 509 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) [2025-03-14 01:07:21,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:21,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-14 01:07:21,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:27,800 INFO L124 PetriNetUnfolderBase]: 54952/80888 cut-off events. [2025-03-14 01:07:27,800 INFO L125 PetriNetUnfolderBase]: For 127945/127972 co-relation queries the response was YES. [2025-03-14 01:07:28,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259415 conditions, 80888 events. 54952/80888 cut-off events. For 127945/127972 co-relation queries the response was YES. Maximal size of possible extension queue 3336. Compared 626483 event pairs, 7898 based on Foata normal form. 416/81246 useless extension candidates. Maximal degree in co-relation 220131. Up to 42423 conditions per place. [2025-03-14 01:07:28,603 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 202 selfloop transitions, 48 changer transitions 14/279 dead transitions. [2025-03-14 01:07:28,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 279 transitions, 2099 flow [2025-03-14 01:07:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-14 01:07:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-14 01:07:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 296 transitions. [2025-03-14 01:07:28,605 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.592 [2025-03-14 01:07:28,605 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 509 flow. Second operand 10 states and 296 transitions. [2025-03-14 01:07:28,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 279 transitions, 2099 flow [2025-03-14 01:07:29,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 279 transitions, 2099 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-14 01:07:29,351 INFO L231 Difference]: Finished difference. Result has 106 places, 136 transitions, 1024 flow [2025-03-14 01:07:29,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1024, PETRI_PLACES=106, PETRI_TRANSITIONS=136} [2025-03-14 01:07:29,351 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2025-03-14 01:07:29,352 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 136 transitions, 1024 flow [2025-03-14 01:07:29,352 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) [2025-03-14 01:07:29,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:29,352 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] [2025-03-14 01:07:29,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-14 01:07:29,352 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)] === [2025-03-14 01:07:29,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash -426014246, now seen corresponding path program 3 times [2025-03-14 01:07:29,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:29,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774184180] [2025-03-14 01:07:29,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:07:29,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:29,362 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 2 equivalence classes. [2025-03-14 01:07:29,373 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 36 of 37 statements. [2025-03-14 01:07:29,373 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-14 01:07:29,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:29,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:29,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774184180] [2025-03-14 01:07:29,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774184180] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:29,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:29,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:07:29,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904540389] [2025-03-14 01:07:29,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:29,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:07:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:29,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:07:29,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-14 01:07:29,659 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2025-03-14 01:07:29,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 136 transitions, 1024 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:29,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:29,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2025-03-14 01:07:29,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand