./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.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-mult2.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 dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 01:07:00,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 01:07:00,837 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 01:07:00,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 01:07:00,843 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 01:07:00,865 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 01:07:00,867 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 01:07:00,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 01:07:00,867 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 01:07:00,867 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 01:07:00,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 01:07:00,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 01:07:00,868 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 01:07:00,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 01:07:00,869 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 01:07:00,869 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 01:07:00,869 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 01:07:00,869 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 01:07:00,869 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 01:07:00,870 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 01:07:00,870 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 01:07:00,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:07:00,871 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 01:07:00,871 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 01:07:00,871 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 01:07:00,871 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 01:07:00,871 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 01:07:00,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 01:07:00,871 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 01:07:00,871 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 01:07:00,871 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 01:07:00,871 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 01:07:00,871 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 -> dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 [2025-03-14 01:07:01,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 01:07:01,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 01:07:01,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 01:07:01,131 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 01:07:01,131 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 01:07:01,132 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2025-03-14 01:07:02,358 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485d2c570/a7b79ca08ead442faa89174bb036eb28/FLAGf1b431d93 [2025-03-14 01:07:02,606 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 01:07:02,607 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2025-03-14 01:07:02,614 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485d2c570/a7b79ca08ead442faa89174bb036eb28/FLAGf1b431d93 [2025-03-14 01:07:02,625 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485d2c570/a7b79ca08ead442faa89174bb036eb28 [2025-03-14 01:07:02,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 01:07:02,628 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 01:07:02,629 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 01:07:02,629 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 01:07:02,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 01:07:02,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d4556 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 01:07:02,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:07:02" (1/1) ... [2025-03-14 01:07:02,649 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 01:07:02,787 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-mult2.wvr.c[4151,4164] [2025-03-14 01:07:02,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:07:02,801 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 01:07:02,826 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-mult2.wvr.c[4151,4164] [2025-03-14 01:07:02,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:07:02,840 INFO L204 MainTranslator]: Completed translation [2025-03-14 01:07:02,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:07:02 WrapperNode [2025-03-14 01:07:02,841 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 01:07:02,843 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 01:07:02,843 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 01:07:02,843 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 01:07:02,848 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 01:07:02,854 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 01:07:02,874 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 274 [2025-03-14 01:07:02,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 01:07:02,879 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 01:07:02,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 01:07:02,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 01:07:02,887 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 01:07:02,887 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 01:07:02,889 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 01:07:02,911 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 01:07:02,915 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 01:07:02,915 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 01:07:02,923 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 01:07:02,924 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 01:07:02,925 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 01:07:02,926 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 01:07:02,929 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 01:07:02,930 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 01:07:02,930 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 01:07:02,930 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 01:07:02,931 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 01:07:02,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:07:02,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:02,955 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 01:07:02,957 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 01:07:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 01:07:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-14 01:07:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-14 01:07:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-14 01:07:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-14 01:07:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-14 01:07:02,974 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-14 01:07:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-14 01:07:02,974 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-14 01:07:02,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-14 01:07:02,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-14 01:07:02,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-14 01:07:02,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-14 01:07:02,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 01:07:02,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-14 01:07:02,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-14 01:07:02,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-14 01:07:02,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-14 01:07:02,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 01:07:02,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 01:07:02,977 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 01:07:03,070 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 01:07:03,072 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 01:07:03,434 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 01:07:03,435 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 01:07:03,435 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 01:07:03,736 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 01:07:03,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:07:03 BoogieIcfgContainer [2025-03-14 01:07:03,737 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 01:07:03,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 01:07:03,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 01:07:03,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 01:07:03,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 01:07:02" (1/3) ... [2025-03-14 01:07:03,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633df77 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 01:07:03,743 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 01:07:03,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633df77 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 01:07:03,744 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 01:07:03,745 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2025-03-14 01:07:03,757 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 01:07:03,758 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-mult2.wvr.c that has 5 procedures, 43 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-14 01:07:03,758 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 01:07:03,813 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-14 01:07:03,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 124 flow [2025-03-14 01:07:03,872 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2025-03-14 01:07:03,874 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-14 01:07:03,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 44 events. 6/44 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2025-03-14 01:07:03,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 48 transitions, 124 flow [2025-03-14 01:07:03,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 110 flow [2025-03-14 01:07:03,888 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 01:07:03,898 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;@1cbeab77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 01:07:03,898 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-14 01:07:03,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 01:07:03,916 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2025-03-14 01:07:03,916 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-14 01:07:03,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:03,917 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 01:07:03,917 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 01:07:03,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:03,921 INFO L85 PathProgramCache]: Analyzing trace with hash 387359366, now seen corresponding path program 1 times [2025-03-14 01:07:03,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:03,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24781840] [2025-03-14 01:07:03,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:03,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:03,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-14 01:07:04,019 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-14 01:07:04,019 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:04,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:04,183 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 01:07:04,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:04,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24781840] [2025-03-14 01:07:04,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24781840] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:04,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:04,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:07:04,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100523378] [2025-03-14 01:07:04,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:04,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:07:04,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:04,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:07:04,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:07:04,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-14 01:07:04,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 110 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 01:07:04,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:04,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-14 01:07:04,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:04,728 INFO L124 PetriNetUnfolderBase]: 3682/5092 cut-off events. [2025-03-14 01:07:04,730 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2025-03-14 01:07:04,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10276 conditions, 5092 events. 3682/5092 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24505 event pairs, 1024 based on Foata normal form. 1/4973 useless extension candidates. Maximal degree in co-relation 9160. Up to 3095 conditions per place. [2025-03-14 01:07:04,766 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 51 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2025-03-14 01:07:04,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 277 flow [2025-03-14 01:07:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:07:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:07:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-03-14 01:07:04,776 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2025-03-14 01:07:04,777 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 110 flow. Second operand 3 states and 95 transitions. [2025-03-14 01:07:04,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 277 flow [2025-03-14 01:07:04,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 251 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-14 01:07:04,786 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 113 flow [2025-03-14 01:07:04,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2025-03-14 01:07:04,791 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2025-03-14 01:07:04,792 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 113 flow [2025-03-14 01:07:04,792 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 01:07:04,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:04,792 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 01:07:04,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 01:07:04,793 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 01:07:04,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:04,794 INFO L85 PathProgramCache]: Analyzing trace with hash -326755222, now seen corresponding path program 1 times [2025-03-14 01:07:04,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:04,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631801943] [2025-03-14 01:07:04,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:04,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:04,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-14 01:07:04,835 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-14 01:07:04,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:04,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:04,995 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 01:07:04,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:04,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631801943] [2025-03-14 01:07:04,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631801943] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:04,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:04,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:07:04,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802316157] [2025-03-14 01:07:04,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:04,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:07:04,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:04,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:07:04,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:07:04,998 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-14 01:07:04,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 113 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 01:07:04,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:04,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-14 01:07:04,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:05,488 INFO L124 PetriNetUnfolderBase]: 4690/6606 cut-off events. [2025-03-14 01:07:05,488 INFO L125 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2025-03-14 01:07:05,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13877 conditions, 6606 events. 4690/6606 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 34764 event pairs, 1685 based on Foata normal form. 186/6713 useless extension candidates. Maximal degree in co-relation 5583. Up to 3904 conditions per place. [2025-03-14 01:07:05,525 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 59 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2025-03-14 01:07:05,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 299 flow [2025-03-14 01:07:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:07:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:07:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2025-03-14 01:07:05,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2025-03-14 01:07:05,528 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 113 flow. Second operand 3 states and 98 transitions. [2025-03-14 01:07:05,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 299 flow [2025-03-14 01:07:05,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:05,531 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 124 flow [2025-03-14 01:07:05,531 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=110, 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=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2025-03-14 01:07:05,532 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2025-03-14 01:07:05,532 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 124 flow [2025-03-14 01:07:05,533 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 01:07:05,533 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:05,533 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 01:07:05,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-14 01:07:05,534 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 01:07:05,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:05,534 INFO L85 PathProgramCache]: Analyzing trace with hash -346867952, now seen corresponding path program 1 times [2025-03-14 01:07:05,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:05,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125315592] [2025-03-14 01:07:05,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:05,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:05,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-14 01:07:05,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-14 01:07:05,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:05,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:05,691 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 01:07:05,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:05,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125315592] [2025-03-14 01:07:05,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125315592] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:05,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:05,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:07:05,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272863684] [2025-03-14 01:07:05,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:05,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:07:05,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:05,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:07:05,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:07:05,693 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-14 01:07:05,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 124 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 01:07:05,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:05,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-14 01:07:05,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:06,264 INFO L124 PetriNetUnfolderBase]: 5824/8334 cut-off events. [2025-03-14 01:07:06,265 INFO L125 PetriNetUnfolderBase]: For 2271/2271 co-relation queries the response was YES. [2025-03-14 01:07:06,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18102 conditions, 8334 events. 5824/8334 cut-off events. For 2271/2271 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 45364 event pairs, 2031 based on Foata normal form. 138/8399 useless extension candidates. Maximal degree in co-relation 11513. Up to 4926 conditions per place. [2025-03-14 01:07:06,309 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 59 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2025-03-14 01:07:06,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 315 flow [2025-03-14 01:07:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:07:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:07:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-03-14 01:07:06,313 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-14 01:07:06,314 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 124 flow. Second operand 3 states and 96 transitions. [2025-03-14 01:07:06,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 315 flow [2025-03-14 01:07:06,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:06,316 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 136 flow [2025-03-14 01:07:06,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2025-03-14 01:07:06,317 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2025-03-14 01:07:06,317 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 136 flow [2025-03-14 01:07:06,317 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 01:07:06,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:06,317 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:07:06,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-14 01:07:06,318 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 01:07:06,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1439369264, now seen corresponding path program 1 times [2025-03-14 01:07:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:06,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130041721] [2025-03-14 01:07:06,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:06,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:06,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-14 01:07:06,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-14 01:07:06,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:06,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:06,502 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 01:07:06,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:06,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130041721] [2025-03-14 01:07:06,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130041721] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:06,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:06,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 01:07:06,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541074613] [2025-03-14 01:07:06,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:06,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:07:06,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:06,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:07:06,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:07:06,505 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-14 01:07:06,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:06,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:06,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-14 01:07:06,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:07,223 INFO L124 PetriNetUnfolderBase]: 7722/11127 cut-off events. [2025-03-14 01:07:07,223 INFO L125 PetriNetUnfolderBase]: For 4137/4137 co-relation queries the response was YES. [2025-03-14 01:07:07,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25172 conditions, 11127 events. 7722/11127 cut-off events. For 4137/4137 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 64350 event pairs, 6327 based on Foata normal form. 211/11225 useless extension candidates. Maximal degree in co-relation 13286. Up to 7786 conditions per place. [2025-03-14 01:07:07,267 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 66 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2025-03-14 01:07:07,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 359 flow [2025-03-14 01:07:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:07:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:07:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-03-14 01:07:07,268 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-14 01:07:07,269 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 136 flow. Second operand 4 states and 116 transitions. [2025-03-14 01:07:07,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 359 flow [2025-03-14 01:07:07,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:07,271 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 154 flow [2025-03-14 01:07:07,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2025-03-14 01:07:07,272 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2025-03-14 01:07:07,273 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 154 flow [2025-03-14 01:07:07,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:07,273 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:07,273 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:07:07,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-14 01:07:07,273 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 01:07:07,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:07,274 INFO L85 PathProgramCache]: Analyzing trace with hash -499416312, now seen corresponding path program 1 times [2025-03-14 01:07:07,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:07,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075712932] [2025-03-14 01:07:07,274 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:07,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:07,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-14 01:07:07,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-14 01:07:07,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:07,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:07,399 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 01:07:07,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:07,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075712932] [2025-03-14 01:07:07,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075712932] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:07,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:07,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:07:07,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853464306] [2025-03-14 01:07:07,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:07,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:07:07,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:07,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:07:07,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:07:07,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-14 01:07:07,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:07,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:07,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-14 01:07:07,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:08,244 INFO L124 PetriNetUnfolderBase]: 10316/15076 cut-off events. [2025-03-14 01:07:08,244 INFO L125 PetriNetUnfolderBase]: For 5648/5648 co-relation queries the response was YES. [2025-03-14 01:07:08,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33490 conditions, 15076 events. 10316/15076 cut-off events. For 5648/5648 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 93184 event pairs, 8685 based on Foata normal form. 335/15271 useless extension candidates. Maximal degree in co-relation 25629. Up to 10444 conditions per place. [2025-03-14 01:07:08,318 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 65 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2025-03-14 01:07:08,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 78 transitions, 374 flow [2025-03-14 01:07:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:07:08,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:07:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-03-14 01:07:08,322 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2025-03-14 01:07:08,322 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 154 flow. Second operand 4 states and 114 transitions. [2025-03-14 01:07:08,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 78 transitions, 374 flow [2025-03-14 01:07:08,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 78 transitions, 370 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:08,328 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 173 flow [2025-03-14 01:07:08,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2025-03-14 01:07:08,328 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2025-03-14 01:07:08,328 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 173 flow [2025-03-14 01:07:08,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:08,329 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:08,329 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 01:07:08,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-14 01:07:08,329 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 01:07:08,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash -778231960, now seen corresponding path program 1 times [2025-03-14 01:07:08,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:08,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515472374] [2025-03-14 01:07:08,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:08,342 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-14 01:07:08,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-14 01:07:08,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:08,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:08,765 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 01:07:08,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:08,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515472374] [2025-03-14 01:07:08,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515472374] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:08,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:08,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:07:08,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846523854] [2025-03-14 01:07:08,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:08,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:07:08,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:08,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:07:08,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-14 01:07:08,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-03-14 01:07:08,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 01:07:08,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:08,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-03-14 01:07:08,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:10,538 INFO L124 PetriNetUnfolderBase]: 22884/32265 cut-off events. [2025-03-14 01:07:10,538 INFO L125 PetriNetUnfolderBase]: For 9386/9396 co-relation queries the response was YES. [2025-03-14 01:07:10,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72394 conditions, 32265 events. 22884/32265 cut-off events. For 9386/9396 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 204922 event pairs, 3936 based on Foata normal form. 4/28491 useless extension candidates. Maximal degree in co-relation 51316. Up to 18522 conditions per place. [2025-03-14 01:07:10,705 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 122 selfloop transitions, 11 changer transitions 6/146 dead transitions. [2025-03-14 01:07:10,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 146 transitions, 699 flow [2025-03-14 01:07:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:07:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:07:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2025-03-14 01:07:10,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2025-03-14 01:07:10,708 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 173 flow. Second operand 7 states and 209 transitions. [2025-03-14 01:07:10,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 146 transitions, 699 flow [2025-03-14 01:07:10,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 146 transitions, 694 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:10,716 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 265 flow [2025-03-14 01:07:10,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=265, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2025-03-14 01:07:10,717 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2025-03-14 01:07:10,718 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 265 flow [2025-03-14 01:07:10,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 01:07:10,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:10,719 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 01:07:10,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-14 01:07:10,719 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 01:07:10,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1557578388, now seen corresponding path program 1 times [2025-03-14 01:07:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:10,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107152066] [2025-03-14 01:07:10,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:10,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:10,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-14 01:07:10,747 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-14 01:07:10,748 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:10,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:11,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:11,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107152066] [2025-03-14 01:07:11,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107152066] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:11,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308336626] [2025-03-14 01:07:11,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:11,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:11,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:11,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:07:11,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 01:07:11,230 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-14 01:07:11,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-14 01:07:11,263 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:11,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:11,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:07:11,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-14 01:07:11,474 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:07:11,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308336626] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:11,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:07:11,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2025-03-14 01:07:11,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30194483] [2025-03-14 01:07:11,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:11,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:07:11,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:11,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:07:11,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2025-03-14 01:07:11,483 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-14 01:07:11,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 265 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:11,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:11,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-14 01:07:11,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:13,722 INFO L124 PetriNetUnfolderBase]: 21289/30932 cut-off events. [2025-03-14 01:07:13,722 INFO L125 PetriNetUnfolderBase]: For 25041/25057 co-relation queries the response was YES. [2025-03-14 01:07:13,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82151 conditions, 30932 events. 21289/30932 cut-off events. For 25041/25057 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 207977 event pairs, 2350 based on Foata normal form. 106/30822 useless extension candidates. Maximal degree in co-relation 57501. Up to 20109 conditions per place. [2025-03-14 01:07:13,974 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 99 selfloop transitions, 13 changer transitions 21/142 dead transitions. [2025-03-14 01:07:13,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 142 transitions, 802 flow [2025-03-14 01:07:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:07:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:07:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2025-03-14 01:07:13,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2025-03-14 01:07:13,976 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 265 flow. Second operand 7 states and 201 transitions. [2025-03-14 01:07:13,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 142 transitions, 802 flow [2025-03-14 01:07:14,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 142 transitions, 802 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-14 01:07:14,133 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 367 flow [2025-03-14 01:07:14,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=367, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2025-03-14 01:07:14,133 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2025-03-14 01:07:14,133 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 367 flow [2025-03-14 01:07:14,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:14,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:14,134 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 01:07:14,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-14 01:07:14,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:14,335 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 01:07:14,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:14,335 INFO L85 PathProgramCache]: Analyzing trace with hash -996723992, now seen corresponding path program 2 times [2025-03-14 01:07:14,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:14,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918618571] [2025-03-14 01:07:14,335 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:07:14,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:14,350 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-14 01:07:14,367 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 32 of 36 statements. [2025-03-14 01:07:14,367 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-14 01:07:14,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:14,646 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 01:07:14,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:14,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918618571] [2025-03-14 01:07:14,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918618571] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:14,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:14,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-14 01:07:14,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416914157] [2025-03-14 01:07:14,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:14,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:07:14,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:14,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:07:14,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-14 01:07:14,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-14 01:07:14,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 367 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:14,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:14,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-14 01:07:14,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:16,391 INFO L124 PetriNetUnfolderBase]: 21982/32107 cut-off events. [2025-03-14 01:07:16,392 INFO L125 PetriNetUnfolderBase]: For 34986/34996 co-relation queries the response was YES. [2025-03-14 01:07:16,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91957 conditions, 32107 events. 21982/32107 cut-off events. For 34986/34996 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 218338 event pairs, 3366 based on Foata normal form. 144/31981 useless extension candidates. Maximal degree in co-relation 63724. Up to 22692 conditions per place. [2025-03-14 01:07:16,635 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 86 selfloop transitions, 11 changer transitions 23/130 dead transitions. [2025-03-14 01:07:16,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 813 flow [2025-03-14 01:07:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:07:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:07:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2025-03-14 01:07:16,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-14 01:07:16,636 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 367 flow. Second operand 6 states and 174 transitions. [2025-03-14 01:07:16,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 813 flow [2025-03-14 01:07:17,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 804 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-14 01:07:17,144 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 429 flow [2025-03-14 01:07:17,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=429, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2025-03-14 01:07:17,145 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2025-03-14 01:07:17,145 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 429 flow [2025-03-14 01:07:17,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:17,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:17,145 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 01:07:17,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-14 01:07:17,145 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 01:07:17,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:17,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1162001378, now seen corresponding path program 3 times [2025-03-14 01:07:17,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:17,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719215289] [2025-03-14 01:07:17,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:07:17,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:17,155 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 2 equivalence classes. [2025-03-14 01:07:17,164 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 35 of 36 statements. [2025-03-14 01:07:17,167 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-14 01:07:17,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:17,462 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 01:07:17,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:17,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719215289] [2025-03-14 01:07:17,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719215289] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:17,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:17,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:07:17,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890670114] [2025-03-14 01:07:17,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:17,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:07:17,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:17,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:07:17,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-14 01:07:17,475 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-14 01:07:17,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 429 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:17,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:17,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-14 01:07:17,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:20,815 INFO L124 PetriNetUnfolderBase]: 30967/46354 cut-off events. [2025-03-14 01:07:20,815 INFO L125 PetriNetUnfolderBase]: For 75417/75425 co-relation queries the response was YES. [2025-03-14 01:07:21,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138697 conditions, 46354 events. 30967/46354 cut-off events. For 75417/75425 co-relation queries the response was YES. Maximal size of possible extension queue 1742. Compared 345638 event pairs, 4474 based on Foata normal form. 1452/47488 useless extension candidates. Maximal degree in co-relation 117568. Up to 23206 conditions per place. [2025-03-14 01:07:21,173 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 132 selfloop transitions, 33 changer transitions 8/183 dead transitions. [2025-03-14 01:07:21,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 183 transitions, 1387 flow [2025-03-14 01:07:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:07:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:07:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2025-03-14 01:07:21,176 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6015625 [2025-03-14 01:07:21,176 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 429 flow. Second operand 8 states and 231 transitions. [2025-03-14 01:07:21,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 183 transitions, 1387 flow [2025-03-14 01:07:21,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 183 transitions, 1345 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-14 01:07:21,777 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 770 flow [2025-03-14 01:07:21,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=770, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2025-03-14 01:07:21,777 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2025-03-14 01:07:21,777 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 770 flow [2025-03-14 01:07:21,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:21,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:21,778 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 01:07:21,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-14 01:07:21,778 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 01:07:21,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:21,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1146967452, now seen corresponding path program 4 times [2025-03-14 01:07:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:21,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937872318] [2025-03-14 01:07:21,778 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:07:21,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:21,789 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-14 01:07:21,804 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-14 01:07:21,805 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:07:21,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:22,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:22,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937872318] [2025-03-14 01:07:22,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937872318] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:22,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:22,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-14 01:07:22,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162394552] [2025-03-14 01:07:22,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:22,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:07:22,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:22,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:07:22,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-14 01:07:22,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-14 01:07:22,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 770 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:22,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:22,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-14 01:07:22,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:27,677 INFO L124 PetriNetUnfolderBase]: 44371/68326 cut-off events. [2025-03-14 01:07:27,678 INFO L125 PetriNetUnfolderBase]: For 197670/197910 co-relation queries the response was YES. [2025-03-14 01:07:28,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241667 conditions, 68326 events. 44371/68326 cut-off events. For 197670/197910 co-relation queries the response was YES. Maximal size of possible extension queue 3029. Compared 560519 event pairs, 7215 based on Foata normal form. 168/63660 useless extension candidates. Maximal degree in co-relation 166215. Up to 34659 conditions per place. [2025-03-14 01:07:28,517 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 165 selfloop transitions, 91 changer transitions 13/282 dead transitions. [2025-03-14 01:07:28,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 282 transitions, 2879 flow [2025-03-14 01:07:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-14 01:07:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-14 01:07:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 289 transitions. [2025-03-14 01:07:28,519 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6020833333333333 [2025-03-14 01:07:28,519 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 770 flow. Second operand 10 states and 289 transitions. [2025-03-14 01:07:28,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 282 transitions, 2879 flow [2025-03-14 01:07:31,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 282 transitions, 2866 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:31,767 INFO L231 Difference]: Finished difference. Result has 107 places, 160 transitions, 2092 flow [2025-03-14 01:07:31,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2092, PETRI_PLACES=107, PETRI_TRANSITIONS=160} [2025-03-14 01:07:31,768 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2025-03-14 01:07:31,768 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 160 transitions, 2092 flow [2025-03-14 01:07:31,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:31,769 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:31,769 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 01:07:31,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-14 01:07:31,769 INFO L396 AbstractCegarLoop]: === Iteration 11 === 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 01:07:31,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash -100316046, now seen corresponding path program 5 times [2025-03-14 01:07:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:31,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922114794] [2025-03-14 01:07:31,771 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:07:31,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:31,783 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-14 01:07:31,796 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-14 01:07:31,800 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:07:31,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:32,044 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 01:07:32,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:32,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922114794] [2025-03-14 01:07:32,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922114794] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:32,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:32,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:07:32,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047349215] [2025-03-14 01:07:32,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:32,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:07:32,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:32,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:07:32,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-14 01:07:32,049 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-14 01:07:32,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 160 transitions, 2092 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:32,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:32,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-14 01:07:32,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:38,874 INFO L124 PetriNetUnfolderBase]: 46680/71644 cut-off events. [2025-03-14 01:07:38,875 INFO L125 PetriNetUnfolderBase]: For 330221/330633 co-relation queries the response was YES. [2025-03-14 01:07:39,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308712 conditions, 71644 events. 46680/71644 cut-off events. For 330221/330633 co-relation queries the response was YES. Maximal size of possible extension queue 3330. Compared 594050 event pairs, 7211 based on Foata normal form. 948/71532 useless extension candidates. Maximal degree in co-relation 216352. Up to 47523 conditions per place. [2025-03-14 01:07:39,663 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 115 selfloop transitions, 86 changer transitions 24/238 dead transitions. [2025-03-14 01:07:39,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 238 transitions, 3235 flow [2025-03-14 01:07:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:07:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:07:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2025-03-14 01:07:39,665 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5868055555555556 [2025-03-14 01:07:39,665 INFO L175 Difference]: Start difference. First operand has 107 places, 160 transitions, 2092 flow. Second operand 6 states and 169 transitions. [2025-03-14 01:07:39,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 238 transitions, 3235 flow [2025-03-14 01:07:48,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 238 transitions, 3203 flow, removed 16 selfloop flow, removed 0 redundant places. [2025-03-14 01:07:48,590 INFO L231 Difference]: Finished difference. Result has 114 places, 172 transitions, 2514 flow [2025-03-14 01:07:48,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2514, PETRI_PLACES=114, PETRI_TRANSITIONS=172} [2025-03-14 01:07:48,590 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 64 predicate places. [2025-03-14 01:07:48,590 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 172 transitions, 2514 flow [2025-03-14 01:07:48,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:48,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:48,591 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 01:07:48,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-14 01:07:48,591 INFO L396 AbstractCegarLoop]: === Iteration 12 === 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 01:07:48,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1165872626, now seen corresponding path program 6 times [2025-03-14 01:07:48,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:48,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94277244] [2025-03-14 01:07:48,591 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:07:48,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:48,600 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 36 statements into 2 equivalence classes. [2025-03-14 01:07:48,605 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 32 of 36 statements. [2025-03-14 01:07:48,606 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-14 01:07:48,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:48,794 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 01:07:48,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94277244] [2025-03-14 01:07:48,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94277244] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:48,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:48,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-14 01:07:48,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636877985] [2025-03-14 01:07:48,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:48,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:07:48,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:48,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:07:48,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-14 01:07:48,806 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-14 01:07:48,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 172 transitions, 2514 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:48,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:48,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-14 01:07:48,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand