./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8ab0bd5 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/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i -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 6d67b26c9d6dbfd265b32dfe97063f0b6065a61c5709b8120357b3eaad40bf46 --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:33:42,721 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:33:42,787 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:33:42,792 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:33:42,793 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:33:42,813 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:33:42,814 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:33:42,815 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:33:42,815 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:33:42,815 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:33:42,815 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:33:42,815 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:33:42,816 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:33:42,816 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:33:42,817 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:33:42,817 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:33:42,817 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:33:42,817 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:33:42,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:33:42,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:33:42,817 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:33:42,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:33:42,817 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:33:42,818 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:33:42,818 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:33:42,818 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:33:42,819 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:33:42,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:33:42,819 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 -> 6d67b26c9d6dbfd265b32dfe97063f0b6065a61c5709b8120357b3eaad40bf46 [2025-03-13 21:33:43,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:33:43,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:33:43,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:33:43,118 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:33:43,118 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:33:43,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2025-03-13 21:33:44,347 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1338de40e/b692366dedcb4a8d8bd21844457af98e/FLAG0cc5f9be1 [2025-03-13 21:33:44,622 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:33:44,622 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2025-03-13 21:33:44,641 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1338de40e/b692366dedcb4a8d8bd21844457af98e/FLAG0cc5f9be1 [2025-03-13 21:33:44,667 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1338de40e/b692366dedcb4a8d8bd21844457af98e [2025-03-13 21:33:44,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:33:44,672 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:33:44,673 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:33:44,673 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:33:44,677 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:33:44,678 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:33:44" (1/1) ... [2025-03-13 21:33:44,679 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1129fc98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:44, skipping insertion in model container [2025-03-13 21:33:44,680 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:33:44" (1/1) ... [2025-03-13 21:33:44,706 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:33:44,836 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/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2025-03-13 21:33:44,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:33:44,948 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:33:44,956 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/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2025-03-13 21:33:44,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:33:45,007 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:33:45,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45 WrapperNode [2025-03-13 21:33:45,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:33:45,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:33:45,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:33:45,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:33:45,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,038 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2025-03-13 21:33:45,038 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:33:45,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:33:45,038 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:33:45,039 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:33:45,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,052 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,064 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-13 21:33:45,064 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,067 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:33:45,078 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:33:45,078 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:33:45,078 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:33:45,079 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (1/1) ... [2025-03-13 21:33:45,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:33:45,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:33:45,113 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) [2025-03-13 21:33:45,120 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 [2025-03-13 21:33:45,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-13 21:33:45,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:33:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2025-03-13 21:33:45,141 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2025-03-13 21:33:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2025-03-13 21:33:45,141 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2025-03-13 21:33:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2025-03-13 21:33:45,141 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2025-03-13 21:33:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:33:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-13 21:33:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:33:45,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:33:45,143 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:33:45,250 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:33:45,252 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:33:45,357 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:33:45,358 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:33:45,358 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:33:45,463 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:33:45,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:33:45 BoogieIcfgContainer [2025-03-13 21:33:45,465 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:33:45,466 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:33:45,466 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:33:45,471 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:33:45,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:33:44" (1/3) ... [2025-03-13 21:33:45,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47996d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:33:45, skipping insertion in model container [2025-03-13 21:33:45,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:33:45" (2/3) ... [2025-03-13 21:33:45,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47996d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:33:45, skipping insertion in model container [2025-03-13 21:33:45,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:33:45" (3/3) ... [2025-03-13 21:33:45,474 INFO L128 eAbstractionObserver]: Analyzing ICFG safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2025-03-13 21:33:45,485 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:33:45,486 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i that has 4 procedures, 38 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-13 21:33:45,486 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:33:45,527 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-13 21:33:45,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 38 transitions, 88 flow [2025-03-13 21:33:45,575 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2025-03-13 21:33:45,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-13 21:33:45,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 35 events. 1/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2025-03-13 21:33:45,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 38 transitions, 88 flow [2025-03-13 21:33:45,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2025-03-13 21:33:45,586 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:33:45,594 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;@5a3dc147, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:33:45,595 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-13 21:33:45,605 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:33:45,605 INFO L124 PetriNetUnfolderBase]: 0/31 cut-off events. [2025-03-13 21:33:45,605 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-13 21:33:45,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:33:45,606 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:33:45,606 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 1 more)] === [2025-03-13 21:33:45,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:33:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1759975644, now seen corresponding path program 1 times [2025-03-13 21:33:45,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:33:45,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738702531] [2025-03-13 21:33:45,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:33:45,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:33:45,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-13 21:33:45,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-13 21:33:45,726 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:33:45,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:33:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:33:45,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:33:45,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738702531] [2025-03-13 21:33:45,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738702531] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:33:45,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:33:45,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:33:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100046449] [2025-03-13 21:33:45,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:33:45,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:33:45,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:33:46,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:33:46,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:33:46,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2025-03-13 21:33:46,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2025-03-13 21:33:46,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:33:46,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2025-03-13 21:33:46,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:33:46,473 INFO L124 PetriNetUnfolderBase]: 3123/4931 cut-off events. [2025-03-13 21:33:46,474 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-03-13 21:33:46,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9638 conditions, 4931 events. 3123/4931 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 28086 event pairs, 535 based on Foata normal form. 216/5142 useless extension candidates. Maximal degree in co-relation 9627. Up to 2501 conditions per place. [2025-03-13 21:33:46,509 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 54 selfloop transitions, 5 changer transitions 1/65 dead transitions. [2025-03-13 21:33:46,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 65 transitions, 265 flow [2025-03-13 21:33:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:33:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:33:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-03-13 21:33:46,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6447368421052632 [2025-03-13 21:33:46,524 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 4 states and 98 transitions. [2025-03-13 21:33:46,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 65 transitions, 265 flow [2025-03-13 21:33:46,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 260 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-13 21:33:46,530 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 104 flow [2025-03-13 21:33:46,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2025-03-13 21:33:46,536 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2025-03-13 21:33:46,537 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 104 flow [2025-03-13 21:33:46,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2025-03-13 21:33:46,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:33:46,537 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:33:46,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:33:46,538 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 1 more)] === [2025-03-13 21:33:46,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:33:46,539 INFO L85 PathProgramCache]: Analyzing trace with hash 672314450, now seen corresponding path program 1 times [2025-03-13 21:33:46,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:33:46,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296262380] [2025-03-13 21:33:46,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:33:46,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:33:46,566 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-13 21:33:46,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-13 21:33:46,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:33:46,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:33:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:33:46,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:33:46,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296262380] [2025-03-13 21:33:46,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296262380] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:33:46,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:33:46,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:33:46,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064360775] [2025-03-13 21:33:46,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:33:46,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:33:46,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:33:46,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:33:46,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:33:46,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2025-03-13 21:33:46,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2025-03-13 21:33:46,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:33:46,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2025-03-13 21:33:46,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:33:47,118 INFO L124 PetriNetUnfolderBase]: 1827/2899 cut-off events. [2025-03-13 21:33:47,118 INFO L125 PetriNetUnfolderBase]: For 600/600 co-relation queries the response was YES. [2025-03-13 21:33:47,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6659 conditions, 2899 events. 1827/2899 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 14447 event pairs, 339 based on Foata normal form. 152/3046 useless extension candidates. Maximal degree in co-relation 6647. Up to 960 conditions per place. [2025-03-13 21:33:47,132 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 69 selfloop transitions, 8 changer transitions 1/83 dead transitions. [2025-03-13 21:33:47,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 83 transitions, 377 flow [2025-03-13 21:33:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:33:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:33:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2025-03-13 21:33:47,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2025-03-13 21:33:47,136 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 104 flow. Second operand 5 states and 125 transitions. [2025-03-13 21:33:47,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 83 transitions, 377 flow [2025-03-13 21:33:47,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 367 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-13 21:33:47,140 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 144 flow [2025-03-13 21:33:47,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2025-03-13 21:33:47,141 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2025-03-13 21:33:47,141 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 144 flow [2025-03-13 21:33:47,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2025-03-13 21:33:47,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:33:47,141 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] [2025-03-13 21:33:47,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-13 21:33:47,142 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 1 more)] === [2025-03-13 21:33:47,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:33:47,142 INFO L85 PathProgramCache]: Analyzing trace with hash 686531962, now seen corresponding path program 1 times [2025-03-13 21:33:47,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:33:47,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979180674] [2025-03-13 21:33:47,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:33:47,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:33:47,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:33:47,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:33:47,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:33:47,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:33:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:33:47,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:33:47,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979180674] [2025-03-13 21:33:47,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979180674] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:33:47,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:33:47,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:33:47,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183181309] [2025-03-13 21:33:47,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:33:47,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:33:47,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:33:47,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:33:47,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-13 21:33:47,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2025-03-13 21:33:47,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) [2025-03-13 21:33:47,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:33:47,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2025-03-13 21:33:47,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:33:47,512 INFO L124 PetriNetUnfolderBase]: 1155/1795 cut-off events. [2025-03-13 21:33:47,513 INFO L125 PetriNetUnfolderBase]: For 1138/1138 co-relation queries the response was YES. [2025-03-13 21:33:47,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4519 conditions, 1795 events. 1155/1795 cut-off events. For 1138/1138 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7937 event pairs, 303 based on Foata normal form. 56/1846 useless extension candidates. Maximal degree in co-relation 4505. Up to 672 conditions per place. [2025-03-13 21:33:47,522 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 58 selfloop transitions, 11 changer transitions 1/75 dead transitions. [2025-03-13 21:33:47,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 368 flow [2025-03-13 21:33:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:33:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:33:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2025-03-13 21:33:47,525 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2025-03-13 21:33:47,525 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 144 flow. Second operand 6 states and 126 transitions. [2025-03-13 21:33:47,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 368 flow [2025-03-13 21:33:47,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 75 transitions, 343 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-13 21:33:47,536 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 158 flow [2025-03-13 21:33:47,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2025-03-13 21:33:47,538 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2025-03-13 21:33:47,538 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 158 flow [2025-03-13 21:33:47,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) [2025-03-13 21:33:47,538 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:33:47,539 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] [2025-03-13 21:33:47,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:33:47,539 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 1 more)] === [2025-03-13 21:33:47,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:33:47,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1610147118, now seen corresponding path program 1 times [2025-03-13 21:33:47,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:33:47,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078087033] [2025-03-13 21:33:47,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:33:47,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:33:47,552 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-13 21:33:47,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:33:47,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:33:47,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:33:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:33:47,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:33:47,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078087033] [2025-03-13 21:33:47,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078087033] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:33:47,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:33:47,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-13 21:33:47,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765211089] [2025-03-13 21:33:47,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:33:47,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:33:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:33:47,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:33:47,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:33:47,768 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2025-03-13 21:33:47,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:33:47,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:33:47,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2025-03-13 21:33:47,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:33:48,065 INFO L124 PetriNetUnfolderBase]: 1661/2565 cut-off events. [2025-03-13 21:33:48,065 INFO L125 PetriNetUnfolderBase]: For 1906/1906 co-relation queries the response was YES. [2025-03-13 21:33:48,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6574 conditions, 2565 events. 1661/2565 cut-off events. For 1906/1906 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11835 event pairs, 275 based on Foata normal form. 8/2570 useless extension candidates. Maximal degree in co-relation 6559. Up to 1332 conditions per place. [2025-03-13 21:33:48,075 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 60 selfloop transitions, 5 changer transitions 23/92 dead transitions. [2025-03-13 21:33:48,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 546 flow [2025-03-13 21:33:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:33:48,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:33:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2025-03-13 21:33:48,077 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4924812030075188 [2025-03-13 21:33:48,077 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 158 flow. Second operand 7 states and 131 transitions. [2025-03-13 21:33:48,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 546 flow [2025-03-13 21:33:48,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 92 transitions, 417 flow, removed 20 selfloop flow, removed 8 redundant places. [2025-03-13 21:33:48,087 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 135 flow [2025-03-13 21:33:48,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=135, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2025-03-13 21:33:48,088 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2025-03-13 21:33:48,088 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 135 flow [2025-03-13 21:33:48,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:33:48,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:33:48,088 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] [2025-03-13 21:33:48,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-13 21:33:48,089 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 1 more)] === [2025-03-13 21:33:48,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:33:48,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1075180854, now seen corresponding path program 2 times [2025-03-13 21:33:48,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:33:48,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657696575] [2025-03-13 21:33:48,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:33:48,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:33:48,097 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 1 equivalence classes. [2025-03-13 21:33:48,107 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:33:48,107 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:33:48,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:33:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:33:48,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:33:48,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657696575] [2025-03-13 21:33:48,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657696575] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:33:48,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:33:48,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-13 21:33:48,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870116276] [2025-03-13 21:33:48,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:33:48,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:33:48,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:33:48,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:33:48,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:33:48,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2025-03-13 21:33:48,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 135 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:33:48,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:33:48,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2025-03-13 21:33:48,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:33:48,473 INFO L124 PetriNetUnfolderBase]: 1353/2133 cut-off events. [2025-03-13 21:33:48,473 INFO L125 PetriNetUnfolderBase]: For 690/693 co-relation queries the response was YES. [2025-03-13 21:33:48,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5345 conditions, 2133 events. 1353/2133 cut-off events. For 690/693 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9831 event pairs, 321 based on Foata normal form. 9/2142 useless extension candidates. Maximal degree in co-relation 5329. Up to 932 conditions per place. [2025-03-13 21:33:48,480 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 51 selfloop transitions, 5 changer transitions 41/101 dead transitions. [2025-03-13 21:33:48,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 101 transitions, 524 flow [2025-03-13 21:33:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:33:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:33:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2025-03-13 21:33:48,481 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5075187969924813 [2025-03-13 21:33:48,481 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 135 flow. Second operand 7 states and 135 transitions. [2025-03-13 21:33:48,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 101 transitions, 524 flow [2025-03-13 21:33:48,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 101 transitions, 491 flow, removed 7 selfloop flow, removed 6 redundant places. [2025-03-13 21:33:48,484 INFO L231 Difference]: Finished difference. Result has 55 places, 38 transitions, 128 flow [2025-03-13 21:33:48,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=128, PETRI_PLACES=55, PETRI_TRANSITIONS=38} [2025-03-13 21:33:48,484 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2025-03-13 21:33:48,484 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 38 transitions, 128 flow [2025-03-13 21:33:48,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:33:48,484 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:33:48,484 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] [2025-03-13 21:33:48,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-13 21:33:48,485 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 1 more)] === [2025-03-13 21:33:48,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:33:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash -74641452, now seen corresponding path program 3 times [2025-03-13 21:33:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:33:48,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514512834] [2025-03-13 21:33:48,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:33:48,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:33:48,490 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 1 equivalence classes. [2025-03-13 21:33:48,496 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:33:48,497 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:33:48,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:33:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:33:48,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:33:48,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514512834] [2025-03-13 21:33:48,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514512834] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:33:48,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:33:48,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:33:48,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878924992] [2025-03-13 21:33:48,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:33:48,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:33:48,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:33:48,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:33:48,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-13 21:33:48,598 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2025-03-13 21:33:48,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 38 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2025-03-13 21:33:48,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:33:48,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2025-03-13 21:33:48,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:33:48,743 INFO L124 PetriNetUnfolderBase]: 525/849 cut-off events. [2025-03-13 21:33:48,743 INFO L125 PetriNetUnfolderBase]: For 244/245 co-relation queries the response was YES. [2025-03-13 21:33:48,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 849 events. 525/849 cut-off events. For 244/245 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2908 event pairs, 177 based on Foata normal form. 8/857 useless extension candidates. Maximal degree in co-relation 2101. Up to 700 conditions per place. [2025-03-13 21:33:48,745 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 0 selfloop transitions, 0 changer transitions 48/48 dead transitions. [2025-03-13 21:33:48,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 240 flow [2025-03-13 21:33:48,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:33:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:33:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2025-03-13 21:33:48,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38596491228070173 [2025-03-13 21:33:48,746 INFO L175 Difference]: Start difference. First operand has 55 places, 38 transitions, 128 flow. Second operand 6 states and 88 transitions. [2025-03-13 21:33:48,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 240 flow [2025-03-13 21:33:48,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 220 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-13 21:33:48,747 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2025-03-13 21:33:48,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2025-03-13 21:33:48,748 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2025-03-13 21:33:48,748 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2025-03-13 21:33:48,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2025-03-13 21:33:48,750 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-03-13 21:33:48,750 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-03-13 21:33:48,750 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-03-13 21:33:48,750 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-03-13 21:33:48,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-13 21:33:48,751 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2025-03-13 21:33:48,753 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-13 21:33:48,753 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-13 21:33:48,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.03 09:33:48 BasicIcfg [2025-03-13 21:33:48,756 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-13 21:33:48,756 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-13 21:33:48,756 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-13 21:33:48,757 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-13 21:33:48,757 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:33:45" (3/4) ... [2025-03-13 21:33:48,758 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-13 21:33:48,760 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure P0 [2025-03-13 21:33:48,760 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure P1 [2025-03-13 21:33:48,760 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure P2 [2025-03-13 21:33:48,763 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 33 nodes and edges [2025-03-13 21:33:48,763 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2025-03-13 21:33:48,763 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-13 21:33:48,763 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-13 21:33:48,818 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-13 21:33:48,819 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-13 21:33:48,819 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-13 21:33:48,819 INFO L158 Benchmark]: Toolchain (without parser) took 4148.95ms. Allocated memory was 142.6MB in the beginning and 192.9MB in the end (delta: 50.3MB). Free memory was 111.3MB in the beginning and 133.4MB in the end (delta: -22.1MB). Peak memory consumption was 28.2MB. Max. memory is 16.1GB. [2025-03-13 21:33:48,820 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 123.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-13 21:33:48,820 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.13ms. Allocated memory is still 142.6MB. Free memory was 110.8MB in the beginning and 90.9MB in the end (delta: 20.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-13 21:33:48,820 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.62ms. Allocated memory is still 142.6MB. Free memory was 90.9MB in the beginning and 89.2MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-13 21:33:48,820 INFO L158 Benchmark]: Boogie Preprocessor took 35.82ms. Allocated memory is still 142.6MB. Free memory was 89.2MB in the beginning and 87.4MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-13 21:33:48,820 INFO L158 Benchmark]: IcfgBuilder took 386.62ms. Allocated memory is still 142.6MB. Free memory was 87.4MB in the beginning and 65.8MB in the end (delta: 21.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-13 21:33:48,820 INFO L158 Benchmark]: TraceAbstraction took 3289.73ms. Allocated memory was 142.6MB in the beginning and 192.9MB in the end (delta: 50.3MB). Free memory was 65.3MB in the beginning and 139.9MB in the end (delta: -74.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-13 21:33:48,821 INFO L158 Benchmark]: Witness Printer took 62.35ms. Allocated memory is still 192.9MB. Free memory was 139.9MB in the beginning and 133.4MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-13 21:33:48,822 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 123.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.13ms. Allocated memory is still 142.6MB. Free memory was 110.8MB in the beginning and 90.9MB in the end (delta: 20.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.62ms. Allocated memory is still 142.6MB. Free memory was 90.9MB in the beginning and 89.2MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.82ms. Allocated memory is still 142.6MB. Free memory was 89.2MB in the beginning and 87.4MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 386.62ms. Allocated memory is still 142.6MB. Free memory was 87.4MB in the beginning and 65.8MB in the end (delta: 21.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 3289.73ms. Allocated memory was 142.6MB in the beginning and 192.9MB in the end (delta: 50.3MB). Free memory was 65.3MB in the beginning and 139.9MB in the end (delta: -74.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 62.35ms. Allocated memory is still 192.9MB. Free memory was 139.9MB in the beginning and 133.4MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 62 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 380 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 372 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 46 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 720 IncrementalHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 0 mSDtfsCounter, 720 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=158occurred in iteration=3, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 144 NumberOfCodeBlocks, 144 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 624 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-13 21:33:48,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE