./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --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/weaver/popl20-more-array-sum-alt2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:48:02,304 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:48:02,364 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:48:02,370 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:48:02,370 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:48:02,394 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:48:02,394 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:48:02,395 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:48:02,395 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:48:02,395 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:48:02,395 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:48:02,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:48:02,396 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:48:02,397 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:48:02,397 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:48:02,397 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:48:02,397 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:48:02,397 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:48:02,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:48:02,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:48:02,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:48:02,397 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:48:02,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:48:02,399 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:48:02,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:48:02,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:48:02,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:48:02,400 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:48:02,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:48:02,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:48:02,400 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:48:02,400 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 -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2025-03-13 21:48:02,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:48:02,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:48:02,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:48:02,635 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:48:02,635 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:48:02,637 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2025-03-13 21:48:03,765 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8878acc6/e3d60fc7d1e647809b2d07f8476b12a2/FLAG7cf73dc03 [2025-03-13 21:48:04,048 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:48:04,049 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2025-03-13 21:48:04,059 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8878acc6/e3d60fc7d1e647809b2d07f8476b12a2/FLAG7cf73dc03 [2025-03-13 21:48:04,099 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8878acc6/e3d60fc7d1e647809b2d07f8476b12a2 [2025-03-13 21:48:04,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:48:04,103 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:48:04,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:48:04,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:48:04,108 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:48:04,109 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f99ca09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04, skipping insertion in model container [2025-03-13 21:48:04,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,122 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:48:04,252 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-array-sum-alt2.wvr.c[2564,2577] [2025-03-13 21:48:04,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:48:04,271 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:48:04,291 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-array-sum-alt2.wvr.c[2564,2577] [2025-03-13 21:48:04,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:48:04,311 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:48:04,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04 WrapperNode [2025-03-13 21:48:04,312 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:48:04,313 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:48:04,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:48:04,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:48:04,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,326 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,350 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 170 [2025-03-13 21:48:04,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:48:04,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:48:04,354 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:48:04,354 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:48:04,360 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,362 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,376 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-13 21:48:04,379 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,380 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,387 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,393 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,394 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:48:04,395 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:48:04,395 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:48:04,395 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:48:04,397 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (1/1) ... [2025-03-13 21:48:04,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:48:04,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:04,424 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 21:48:04,428 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 21:48:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:48:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-13 21:48:04,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-13 21:48:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-13 21:48:04,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-13 21:48:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-13 21:48:04,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-13 21:48:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:48:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:48:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:48:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:48:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-13 21:48:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-13 21:48:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-13 21:48:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:48:04,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:48:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:48:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:48:04,446 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 21:48:04,525 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:48:04,526 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:48:04,750 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:48:04,751 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:48:04,751 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:48:05,003 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:48:05,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:48:05 BoogieIcfgContainer [2025-03-13 21:48:05,004 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:48:05,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:48:05,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:48:05,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:48:05,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:48:04" (1/3) ... [2025-03-13 21:48:05,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa7915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:48:05, skipping insertion in model container [2025-03-13 21:48:05,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:48:04" (2/3) ... [2025-03-13 21:48:05,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa7915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:48:05, skipping insertion in model container [2025-03-13 21:48:05,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:48:05" (3/3) ... [2025-03-13 21:48:05,012 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2025-03-13 21:48:05,025 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:48:05,027 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt2.wvr.c that has 4 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-13 21:48:05,027 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:48:05,075 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-13 21:48:05,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 87 flow [2025-03-13 21:48:05,138 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2025-03-13 21:48:05,140 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-13 21:48:05,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 4/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-03-13 21:48:05,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 87 flow [2025-03-13 21:48:05,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 29 transitions, 76 flow [2025-03-13 21:48:05,154 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:48:05,167 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;@2ea859b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:48:05,167 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-13 21:48:05,178 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:48:05,179 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2025-03-13 21:48:05,179 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-13 21:48:05,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:05,180 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 21:48:05,181 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 21:48:05,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash 798047629, now seen corresponding path program 1 times [2025-03-13 21:48:05,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:05,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554537007] [2025-03-13 21:48:05,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:05,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:05,248 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-13 21:48:05,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-13 21:48:05,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:05,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:05,487 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 21:48:05,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554537007] [2025-03-13 21:48:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554537007] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:48:05,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:48:05,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-13 21:48:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071787194] [2025-03-13 21:48:05,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:05,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:48:05,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:05,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:48:05,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:48:05,515 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-03-13 21:48:05,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 21:48:05,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:05,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-03-13 21:48:05,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:05,727 INFO L124 PetriNetUnfolderBase]: 617/956 cut-off events. [2025-03-13 21:48:05,728 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2025-03-13 21:48:05,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1951 conditions, 956 events. 617/956 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3850 event pairs, 126 based on Foata normal form. 1/952 useless extension candidates. Maximal degree in co-relation 1717. Up to 677 conditions per place. [2025-03-13 21:48:05,739 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2025-03-13 21:48:05,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 209 flow [2025-03-13 21:48:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:48:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:48:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2025-03-13 21:48:05,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2025-03-13 21:48:05,751 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 64 transitions. [2025-03-13 21:48:05,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 209 flow [2025-03-13 21:48:05,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-13 21:48:05,758 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 90 flow [2025-03-13 21:48:05,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2025-03-13 21:48:05,763 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2025-03-13 21:48:05,765 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 90 flow [2025-03-13 21:48:05,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 21:48:05,765 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:05,765 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] [2025-03-13 21:48:05,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:48:05,766 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 21:48:05,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1287002738, now seen corresponding path program 1 times [2025-03-13 21:48:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:05,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018620117] [2025-03-13 21:48:05,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:05,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:05,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:48:05,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:48:05,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:05,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:05,934 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 21:48:05,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:05,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018620117] [2025-03-13 21:48:05,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018620117] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:48:05,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:48:05,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:48:05,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457437848] [2025-03-13 21:48:05,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:05,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:48:05,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:05,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:48:05,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:48:05,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-03-13 21:48:05,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 21:48:05,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:05,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-03-13 21:48:05,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:06,193 INFO L124 PetriNetUnfolderBase]: 1206/1894 cut-off events. [2025-03-13 21:48:06,194 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2025-03-13 21:48:06,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 1894 events. 1206/1894 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9229 event pairs, 745 based on Foata normal form. 0/1822 useless extension candidates. Maximal degree in co-relation 1088. Up to 1120 conditions per place. [2025-03-13 21:48:06,202 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 63 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2025-03-13 21:48:06,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 71 transitions, 334 flow [2025-03-13 21:48:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:48:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:48:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2025-03-13 21:48:06,204 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2025-03-13 21:48:06,204 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 90 flow. Second operand 5 states and 92 transitions. [2025-03-13 21:48:06,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 71 transitions, 334 flow [2025-03-13 21:48:06,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 71 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:48:06,205 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 122 flow [2025-03-13 21:48:06,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2025-03-13 21:48:06,206 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2025-03-13 21:48:06,206 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 122 flow [2025-03-13 21:48:06,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 21:48:06,206 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:06,207 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] [2025-03-13 21:48:06,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-13 21:48:06,207 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 21:48:06,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:06,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1391260711, now seen corresponding path program 1 times [2025-03-13 21:48:06,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:06,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201461295] [2025-03-13 21:48:06,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:06,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:06,220 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:48:06,227 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:48:06,228 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:06,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:06,335 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 21:48:06,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:06,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201461295] [2025-03-13 21:48:06,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201461295] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:48:06,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:48:06,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:48:06,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419546589] [2025-03-13 21:48:06,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:06,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:48:06,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:06,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:48:06,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:48:06,343 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-03-13 21:48:06,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 21:48:06,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:06,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-03-13 21:48:06,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:06,528 INFO L124 PetriNetUnfolderBase]: 1047/1641 cut-off events. [2025-03-13 21:48:06,528 INFO L125 PetriNetUnfolderBase]: For 677/755 co-relation queries the response was YES. [2025-03-13 21:48:06,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3890 conditions, 1641 events. 1047/1641 cut-off events. For 677/755 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7555 event pairs, 686 based on Foata normal form. 0/1568 useless extension candidates. Maximal degree in co-relation 2766. Up to 1133 conditions per place. [2025-03-13 21:48:06,536 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 56 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2025-03-13 21:48:06,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 326 flow [2025-03-13 21:48:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:48:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:48:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2025-03-13 21:48:06,537 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2025-03-13 21:48:06,537 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 122 flow. Second operand 5 states and 87 transitions. [2025-03-13 21:48:06,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 326 flow [2025-03-13 21:48:06,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 322 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-13 21:48:06,539 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 143 flow [2025-03-13 21:48:06,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2025-03-13 21:48:06,540 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2025-03-13 21:48:06,540 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 143 flow [2025-03-13 21:48:06,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 21:48:06,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:06,540 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] [2025-03-13 21:48:06,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:48:06,540 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 21:48:06,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:06,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1437167876, now seen corresponding path program 1 times [2025-03-13 21:48:06,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:06,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980943574] [2025-03-13 21:48:06,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:06,547 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:48:06,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:48:06,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:06,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:06,650 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 21:48:06,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980943574] [2025-03-13 21:48:06,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980943574] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:48:06,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:48:06,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:48:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860481149] [2025-03-13 21:48:06,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:06,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:48:06,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:06,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:48:06,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:48:06,661 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-03-13 21:48:06,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 21:48:06,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:06,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-03-13 21:48:06,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:06,848 INFO L124 PetriNetUnfolderBase]: 882/1337 cut-off events. [2025-03-13 21:48:06,849 INFO L125 PetriNetUnfolderBase]: For 784/921 co-relation queries the response was YES. [2025-03-13 21:48:06,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1337 events. 882/1337 cut-off events. For 784/921 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5569 event pairs, 601 based on Foata normal form. 0/1270 useless extension candidates. Maximal degree in co-relation 2827. Up to 1095 conditions per place. [2025-03-13 21:48:06,856 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 28 selfloop transitions, 2 changer transitions 23/56 dead transitions. [2025-03-13 21:48:06,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 309 flow [2025-03-13 21:48:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:48:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:48:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2025-03-13 21:48:06,859 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2025-03-13 21:48:06,859 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 143 flow. Second operand 5 states and 81 transitions. [2025-03-13 21:48:06,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 309 flow [2025-03-13 21:48:06,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-13 21:48:06,861 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 116 flow [2025-03-13 21:48:06,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2025-03-13 21:48:06,861 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 12 predicate places. [2025-03-13 21:48:06,861 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 116 flow [2025-03-13 21:48:06,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 21:48:06,861 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:06,862 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] [2025-03-13 21:48:06,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-13 21:48:06,863 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 21:48:06,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash -315886043, now seen corresponding path program 1 times [2025-03-13 21:48:06,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:06,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896707351] [2025-03-13 21:48:06,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:06,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:06,870 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:48:06,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:06,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:06,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:06,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:06,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896707351] [2025-03-13 21:48:06,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896707351] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:06,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668510470] [2025-03-13 21:48:06,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:06,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:06,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:06,951 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) [2025-03-13 21:48:06,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:48:07,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:48:07,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:07,026 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:07,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:07,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:48:07,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:07,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:07,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668510470] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:07,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:07,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-03-13 21:48:07,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886856673] [2025-03-13 21:48:07,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:07,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:48:07,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:07,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:48:07,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-13 21:48:07,220 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-03-13 21:48:07,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 21:48:07,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:07,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-03-13 21:48:07,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:07,599 INFO L124 PetriNetUnfolderBase]: 1468/2122 cut-off events. [2025-03-13 21:48:07,600 INFO L125 PetriNetUnfolderBase]: For 843/993 co-relation queries the response was YES. [2025-03-13 21:48:07,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5707 conditions, 2122 events. 1468/2122 cut-off events. For 843/993 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9238 event pairs, 293 based on Foata normal form. 0/1872 useless extension candidates. Maximal degree in co-relation 5688. Up to 668 conditions per place. [2025-03-13 21:48:07,613 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 87 selfloop transitions, 15 changer transitions 0/104 dead transitions. [2025-03-13 21:48:07,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 104 transitions, 559 flow [2025-03-13 21:48:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:48:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:48:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2025-03-13 21:48:07,617 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4612794612794613 [2025-03-13 21:48:07,617 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 116 flow. Second operand 9 states and 137 transitions. [2025-03-13 21:48:07,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 104 transitions, 559 flow [2025-03-13 21:48:07,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 104 transitions, 489 flow, removed 33 selfloop flow, removed 8 redundant places. [2025-03-13 21:48:07,626 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 178 flow [2025-03-13 21:48:07,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=178, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2025-03-13 21:48:07,628 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 10 predicate places. [2025-03-13 21:48:07,628 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 178 flow [2025-03-13 21:48:07,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 21:48:07,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:07,629 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] [2025-03-13 21:48:07,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:07,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:07,834 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 21:48:07,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:07,835 INFO L85 PathProgramCache]: Analyzing trace with hash -842556523, now seen corresponding path program 2 times [2025-03-13 21:48:07,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:07,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327019102] [2025-03-13 21:48:07,835 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:48:07,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:07,844 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:07,849 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 23 statements. [2025-03-13 21:48:07,850 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:48:07,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:07,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:07,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327019102] [2025-03-13 21:48:07,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327019102] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:48:07,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:48:07,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-13 21:48:07,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857431098] [2025-03-13 21:48:07,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:07,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-13 21:48:07,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:07,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-13 21:48:07,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:48:07,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-03-13 21:48:07,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 178 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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 21:48:07,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:07,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-03-13 21:48:07,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:08,509 INFO L124 PetriNetUnfolderBase]: 3201/4657 cut-off events. [2025-03-13 21:48:08,509 INFO L125 PetriNetUnfolderBase]: For 3504/3504 co-relation queries the response was YES. [2025-03-13 21:48:08,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13142 conditions, 4657 events. 3201/4657 cut-off events. For 3504/3504 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24168 event pairs, 327 based on Foata normal form. 13/4411 useless extension candidates. Maximal degree in co-relation 13119. Up to 1405 conditions per place. [2025-03-13 21:48:08,536 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 196 selfloop transitions, 23 changer transitions 0/221 dead transitions. [2025-03-13 21:48:08,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 221 transitions, 1373 flow [2025-03-13 21:48:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:48:08,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:48:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2025-03-13 21:48:08,537 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5316804407713499 [2025-03-13 21:48:08,538 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 178 flow. Second operand 11 states and 193 transitions. [2025-03-13 21:48:08,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 221 transitions, 1373 flow [2025-03-13 21:48:08,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 221 transitions, 1370 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-13 21:48:08,551 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 405 flow [2025-03-13 21:48:08,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=405, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2025-03-13 21:48:08,552 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 27 predicate places. [2025-03-13 21:48:08,553 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 405 flow [2025-03-13 21:48:08,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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 21:48:08,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:08,554 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] [2025-03-13 21:48:08,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-13 21:48:08,554 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 1 more)] === [2025-03-13 21:48:08,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1637086117, now seen corresponding path program 3 times [2025-03-13 21:48:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:08,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645510792] [2025-03-13 21:48:08,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:48:08,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:08,562 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:08,573 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:08,574 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:48:08,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:08,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:08,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645510792] [2025-03-13 21:48:08,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645510792] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:08,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001692483] [2025-03-13 21:48:08,642 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:48:08,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:08,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:08,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:08,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:48:08,689 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:08,707 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:08,708 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:48:08,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:08,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:48:08,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:08,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:08,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001692483] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:08,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:08,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-03-13 21:48:08,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84934902] [2025-03-13 21:48:08,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:08,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:48:08,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:08,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:48:08,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:48:08,839 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-03-13 21:48:08,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 405 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 21:48:08,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:08,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-03-13 21:48:08,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:09,358 INFO L124 PetriNetUnfolderBase]: 4339/6263 cut-off events. [2025-03-13 21:48:09,358 INFO L125 PetriNetUnfolderBase]: For 12931/13294 co-relation queries the response was YES. [2025-03-13 21:48:09,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22272 conditions, 6263 events. 4339/6263 cut-off events. For 12931/13294 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32858 event pairs, 759 based on Foata normal form. 184/6442 useless extension candidates. Maximal degree in co-relation 22241. Up to 1980 conditions per place. [2025-03-13 21:48:09,392 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 125 selfloop transitions, 40 changer transitions 0/168 dead transitions. [2025-03-13 21:48:09,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 168 transitions, 1272 flow [2025-03-13 21:48:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:48:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:48:09,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2025-03-13 21:48:09,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2025-03-13 21:48:09,396 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 405 flow. Second operand 9 states and 144 transitions. [2025-03-13 21:48:09,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 168 transitions, 1272 flow [2025-03-13 21:48:09,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 168 transitions, 1260 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:48:09,440 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 681 flow [2025-03-13 21:48:09,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=681, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2025-03-13 21:48:09,440 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 39 predicate places. [2025-03-13 21:48:09,440 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 681 flow [2025-03-13 21:48:09,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 21:48:09,441 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:09,441 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] [2025-03-13 21:48:09,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:09,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-03-13 21:48:09,641 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 1 more)] === [2025-03-13 21:48:09,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:09,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1166765793, now seen corresponding path program 4 times [2025-03-13 21:48:09,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:09,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134737025] [2025-03-13 21:48:09,642 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:48:09,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:09,650 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:09,655 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-03-13 21:48:09,655 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:48:09,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:09,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134737025] [2025-03-13 21:48:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134737025] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:48:09,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:48:09,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:48:09,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40304891] [2025-03-13 21:48:09,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:09,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:48:09,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:09,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:48:09,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:48:09,708 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-13 21:48:09,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 681 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 21:48:09,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:09,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-13 21:48:09,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:10,988 INFO L124 PetriNetUnfolderBase]: 8944/12548 cut-off events. [2025-03-13 21:48:10,988 INFO L125 PetriNetUnfolderBase]: For 50159/50159 co-relation queries the response was YES. [2025-03-13 21:48:11,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52961 conditions, 12548 events. 8944/12548 cut-off events. For 50159/50159 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 65772 event pairs, 958 based on Foata normal form. 24/12115 useless extension candidates. Maximal degree in co-relation 52923. Up to 3364 conditions per place. [2025-03-13 21:48:11,119 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 243 selfloop transitions, 162 changer transitions 0/406 dead transitions. [2025-03-13 21:48:11,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 406 transitions, 3914 flow [2025-03-13 21:48:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-13 21:48:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-13 21:48:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 269 transitions. [2025-03-13 21:48:11,122 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45286195286195285 [2025-03-13 21:48:11,122 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 681 flow. Second operand 18 states and 269 transitions. [2025-03-13 21:48:11,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 406 transitions, 3914 flow [2025-03-13 21:48:11,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 406 transitions, 3749 flow, removed 20 selfloop flow, removed 4 redundant places. [2025-03-13 21:48:11,295 INFO L231 Difference]: Finished difference. Result has 103 places, 223 transitions, 2598 flow [2025-03-13 21:48:11,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2598, PETRI_PLACES=103, PETRI_TRANSITIONS=223} [2025-03-13 21:48:11,296 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 68 predicate places. [2025-03-13 21:48:11,299 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 223 transitions, 2598 flow [2025-03-13 21:48:11,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 21:48:11,299 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:11,299 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] [2025-03-13 21:48:11,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-13 21:48:11,299 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 1 more)] === [2025-03-13 21:48:11,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2122204577, now seen corresponding path program 5 times [2025-03-13 21:48:11,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:11,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040095475] [2025-03-13 21:48:11,300 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:48:11,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:11,308 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:11,313 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:11,314 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:48:11,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:11,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:11,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040095475] [2025-03-13 21:48:11,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040095475] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:11,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019694053] [2025-03-13 21:48:11,381 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:48:11,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:11,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:11,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:11,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-13 21:48:11,424 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:11,441 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:11,441 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:48:11,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:11,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:48:11,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:11,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:11,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019694053] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:11,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:11,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2025-03-13 21:48:11,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919779673] [2025-03-13 21:48:11,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:11,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-13 21:48:11,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:11,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-13 21:48:11,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-03-13 21:48:11,591 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-13 21:48:11,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 223 transitions, 2598 flow. Second operand has 16 states, 16 states have (on average 7.0) internal successors, (112), 16 states have internal predecessors, (112), 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 21:48:11,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:11,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-13 21:48:11,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:14,419 INFO L124 PetriNetUnfolderBase]: 15903/22433 cut-off events. [2025-03-13 21:48:14,419 INFO L125 PetriNetUnfolderBase]: For 163556/163556 co-relation queries the response was YES. [2025-03-13 21:48:14,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115271 conditions, 22433 events. 15903/22433 cut-off events. For 163556/163556 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 129219 event pairs, 1556 based on Foata normal form. 62/22494 useless extension candidates. Maximal degree in co-relation 115218. Up to 5067 conditions per place. [2025-03-13 21:48:14,576 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 419 selfloop transitions, 413 changer transitions 1/834 dead transitions. [2025-03-13 21:48:14,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 834 transitions, 9852 flow [2025-03-13 21:48:14,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-13 21:48:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-13 21:48:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 435 transitions. [2025-03-13 21:48:14,579 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2025-03-13 21:48:14,579 INFO L175 Difference]: Start difference. First operand has 103 places, 223 transitions, 2598 flow. Second operand 30 states and 435 transitions. [2025-03-13 21:48:14,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 834 transitions, 9852 flow [2025-03-13 21:48:15,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 834 transitions, 9576 flow, removed 138 selfloop flow, removed 0 redundant places. [2025-03-13 21:48:15,968 INFO L231 Difference]: Finished difference. Result has 141 places, 509 transitions, 7194 flow [2025-03-13 21:48:15,968 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7194, PETRI_PLACES=141, PETRI_TRANSITIONS=509} [2025-03-13 21:48:15,970 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 106 predicate places. [2025-03-13 21:48:15,970 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 509 transitions, 7194 flow [2025-03-13 21:48:15,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0) internal successors, (112), 16 states have internal predecessors, (112), 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 21:48:15,970 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:15,970 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] [2025-03-13 21:48:15,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:16,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:16,174 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 1 more)] === [2025-03-13 21:48:16,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1623356617, now seen corresponding path program 6 times [2025-03-13 21:48:16,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:16,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243604742] [2025-03-13 21:48:16,175 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:48:16,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:16,182 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:16,187 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 22 of 23 statements. [2025-03-13 21:48:16,187 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:48:16,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:16,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:16,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243604742] [2025-03-13 21:48:16,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243604742] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:48:16,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:48:16,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-13 21:48:16,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458727803] [2025-03-13 21:48:16,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:16,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-13 21:48:16,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:16,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-13 21:48:16,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:48:16,301 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-13 21:48:16,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 509 transitions, 7194 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 21:48:16,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:16,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-13 21:48:16,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:19,739 INFO L124 PetriNetUnfolderBase]: 19750/27758 cut-off events. [2025-03-13 21:48:19,739 INFO L125 PetriNetUnfolderBase]: For 264777/264777 co-relation queries the response was YES. [2025-03-13 21:48:19,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157140 conditions, 27758 events. 19750/27758 cut-off events. For 264777/264777 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 165309 event pairs, 5136 based on Foata normal form. 16/27774 useless extension candidates. Maximal degree in co-relation 157074. Up to 17364 conditions per place. [2025-03-13 21:48:19,930 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 891 selfloop transitions, 254 changer transitions 0/1146 dead transitions. [2025-03-13 21:48:19,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 1146 transitions, 17944 flow [2025-03-13 21:48:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:48:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:48:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2025-03-13 21:48:19,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2025-03-13 21:48:19,932 INFO L175 Difference]: Start difference. First operand has 141 places, 509 transitions, 7194 flow. Second operand 12 states and 210 transitions. [2025-03-13 21:48:19,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 1146 transitions, 17944 flow [2025-03-13 21:48:23,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 1146 transitions, 16721 flow, removed 550 selfloop flow, removed 3 redundant places. [2025-03-13 21:48:23,441 INFO L231 Difference]: Finished difference. Result has 158 places, 708 transitions, 10697 flow [2025-03-13 21:48:23,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6733, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10697, PETRI_PLACES=158, PETRI_TRANSITIONS=708} [2025-03-13 21:48:23,442 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 123 predicate places. [2025-03-13 21:48:23,442 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 708 transitions, 10697 flow [2025-03-13 21:48:23,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 21:48:23,442 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:23,442 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] [2025-03-13 21:48:23,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-13 21:48:23,443 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 1 more)] === [2025-03-13 21:48:23,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash -582138042, now seen corresponding path program 1 times [2025-03-13 21:48:23,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:23,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235006224] [2025-03-13 21:48:23,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:23,448 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:48:23,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:23,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:23,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:23,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:23,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235006224] [2025-03-13 21:48:23,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235006224] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:23,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213049459] [2025-03-13 21:48:23,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:23,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:23,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:23,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:23,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-13 21:48:23,547 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:48:23,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:23,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:23,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:23,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:48:23,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:23,581 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213049459] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:23,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:23,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-13 21:48:23,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931676439] [2025-03-13 21:48:23,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:23,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:48:23,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:23,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:48:23,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:48:23,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-03-13 21:48:23,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 708 transitions, 10697 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 21:48:23,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:23,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-03-13 21:48:23,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:26,981 INFO L124 PetriNetUnfolderBase]: 15765/22593 cut-off events. [2025-03-13 21:48:26,981 INFO L125 PetriNetUnfolderBase]: For 273879/276394 co-relation queries the response was YES. [2025-03-13 21:48:27,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133555 conditions, 22593 events. 15765/22593 cut-off events. For 273879/276394 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 142636 event pairs, 3076 based on Foata normal form. 1152/23184 useless extension candidates. Maximal degree in co-relation 133482. Up to 11223 conditions per place. [2025-03-13 21:48:27,165 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 693 selfloop transitions, 43 changer transitions 0/874 dead transitions. [2025-03-13 21:48:27,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 874 transitions, 14979 flow [2025-03-13 21:48:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:48:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:48:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2025-03-13 21:48:27,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2025-03-13 21:48:27,166 INFO L175 Difference]: Start difference. First operand has 158 places, 708 transitions, 10697 flow. Second operand 5 states and 72 transitions. [2025-03-13 21:48:27,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 874 transitions, 14979 flow [2025-03-13 21:48:29,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 874 transitions, 14773 flow, removed 90 selfloop flow, removed 1 redundant places. [2025-03-13 21:48:29,462 INFO L231 Difference]: Finished difference. Result has 161 places, 683 transitions, 10306 flow [2025-03-13 21:48:29,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=10220, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10306, PETRI_PLACES=161, PETRI_TRANSITIONS=683} [2025-03-13 21:48:29,463 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2025-03-13 21:48:29,463 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 683 transitions, 10306 flow [2025-03-13 21:48:29,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 21:48:29,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:29,463 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] [2025-03-13 21:48:29,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:29,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:29,664 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 1 more)] === [2025-03-13 21:48:29,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1545178559, now seen corresponding path program 7 times [2025-03-13 21:48:29,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:29,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601712085] [2025-03-13 21:48:29,664 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:48:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:29,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:48:29,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:29,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:29,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:29,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:29,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601712085] [2025-03-13 21:48:29,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601712085] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:29,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498235750] [2025-03-13 21:48:29,758 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:48:29,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:29,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:29,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:29,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-13 21:48:29,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:48:29,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:29,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:29,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:29,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:48:29,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:29,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:29,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498235750] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:29,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:29,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2025-03-13 21:48:29,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842773125] [2025-03-13 21:48:29,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:29,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:48:29,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:29,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:48:29,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-03-13 21:48:29,948 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-03-13 21:48:29,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 683 transitions, 10306 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 21:48:29,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:29,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-03-13 21:48:29,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:33,633 INFO L124 PetriNetUnfolderBase]: 18488/26249 cut-off events. [2025-03-13 21:48:33,634 INFO L125 PetriNetUnfolderBase]: For 275798/276927 co-relation queries the response was YES. [2025-03-13 21:48:33,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153807 conditions, 26249 events. 18488/26249 cut-off events. For 275798/276927 co-relation queries the response was YES. Maximal size of possible extension queue 1227. Compared 161818 event pairs, 2604 based on Foata normal form. 421/26513 useless extension candidates. Maximal degree in co-relation 153731. Up to 9185 conditions per place. [2025-03-13 21:48:33,938 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 636 selfloop transitions, 386 changer transitions 0/1031 dead transitions. [2025-03-13 21:48:33,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 1031 transitions, 16933 flow [2025-03-13 21:48:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:48:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:48:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2025-03-13 21:48:33,940 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2025-03-13 21:48:33,940 INFO L175 Difference]: Start difference. First operand has 161 places, 683 transitions, 10306 flow. Second operand 9 states and 143 transitions. [2025-03-13 21:48:33,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 1031 transitions, 16933 flow [2025-03-13 21:48:37,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 1031 transitions, 16831 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-13 21:48:37,272 INFO L231 Difference]: Finished difference. Result has 170 places, 809 transitions, 13831 flow [2025-03-13 21:48:37,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=10250, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13831, PETRI_PLACES=170, PETRI_TRANSITIONS=809} [2025-03-13 21:48:37,274 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 135 predicate places. [2025-03-13 21:48:37,274 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 809 transitions, 13831 flow [2025-03-13 21:48:37,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 21:48:37,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:37,274 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] [2025-03-13 21:48:37,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:37,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-13 21:48:37,475 INFO L396 AbstractCegarLoop]: === Iteration 13 === 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 21:48:37,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1096939565, now seen corresponding path program 8 times [2025-03-13 21:48:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:37,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573800168] [2025-03-13 21:48:37,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:48:37,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:37,481 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:37,485 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 23 statements. [2025-03-13 21:48:37,485 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:48:37,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:37,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:37,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573800168] [2025-03-13 21:48:37,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573800168] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:48:37,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:48:37,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-13 21:48:37,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787291360] [2025-03-13 21:48:37,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:37,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-13 21:48:37,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:37,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-13 21:48:37,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:48:37,572 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-13 21:48:37,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 809 transitions, 13831 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 21:48:37,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:37,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-13 21:48:37,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:42,363 INFO L124 PetriNetUnfolderBase]: 21421/30001 cut-off events. [2025-03-13 21:48:42,363 INFO L125 PetriNetUnfolderBase]: For 406304/406304 co-relation queries the response was YES. [2025-03-13 21:48:42,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188380 conditions, 30001 events. 21421/30001 cut-off events. For 406304/406304 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 180247 event pairs, 2263 based on Foata normal form. 28/30029 useless extension candidates. Maximal degree in co-relation 188299. Up to 13092 conditions per place. [2025-03-13 21:48:42,730 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 1138 selfloop transitions, 337 changer transitions 0/1476 dead transitions. [2025-03-13 21:48:42,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 1476 transitions, 26995 flow [2025-03-13 21:48:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:48:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:48:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 219 transitions. [2025-03-13 21:48:42,732 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104895104895105 [2025-03-13 21:48:42,732 INFO L175 Difference]: Start difference. First operand has 170 places, 809 transitions, 13831 flow. Second operand 13 states and 219 transitions. [2025-03-13 21:48:42,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 1476 transitions, 26995 flow [2025-03-13 21:48:46,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1476 transitions, 26642 flow, removed 175 selfloop flow, removed 2 redundant places. [2025-03-13 21:48:46,853 INFO L231 Difference]: Finished difference. Result has 188 places, 902 transitions, 16761 flow [2025-03-13 21:48:46,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=13696, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16761, PETRI_PLACES=188, PETRI_TRANSITIONS=902} [2025-03-13 21:48:46,854 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 153 predicate places. [2025-03-13 21:48:46,854 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 902 transitions, 16761 flow [2025-03-13 21:48:46,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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 21:48:46,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:46,854 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] [2025-03-13 21:48:46,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-13 21:48:46,854 INFO L396 AbstractCegarLoop]: === Iteration 14 === 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 21:48:46,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash 601447453, now seen corresponding path program 9 times [2025-03-13 21:48:46,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:46,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980958763] [2025-03-13 21:48:46,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:48:46,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:46,859 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:46,864 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:46,864 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:48:46,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:46,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:46,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980958763] [2025-03-13 21:48:46,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980958763] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:46,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766133963] [2025-03-13 21:48:46,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:48:46,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:46,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:46,919 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:46,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-13 21:48:46,959 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:46,974 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:46,974 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:48:46,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:46,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:48:46,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:47,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:47,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766133963] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:47,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:47,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2025-03-13 21:48:47,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422783597] [2025-03-13 21:48:47,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:47,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:48:47,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:47,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:48:47,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-13 21:48:47,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-03-13 21:48:47,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 902 transitions, 16761 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 21:48:47,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:47,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-03-13 21:48:47,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:52,102 INFO L124 PetriNetUnfolderBase]: 19115/27267 cut-off events. [2025-03-13 21:48:52,102 INFO L125 PetriNetUnfolderBase]: For 403508/404571 co-relation queries the response was YES. [2025-03-13 21:48:52,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176401 conditions, 27267 events. 19115/27267 cut-off events. For 403508/404571 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 170276 event pairs, 1929 based on Foata normal form. 402/27512 useless extension candidates. Maximal degree in co-relation 176313. Up to 11878 conditions per place. [2025-03-13 21:48:52,428 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 426 selfloop transitions, 604 changer transitions 0/1039 dead transitions. [2025-03-13 21:48:52,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1039 transitions, 20569 flow [2025-03-13 21:48:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-13 21:48:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-13 21:48:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2025-03-13 21:48:52,429 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2025-03-13 21:48:52,429 INFO L175 Difference]: Start difference. First operand has 188 places, 902 transitions, 16761 flow. Second operand 8 states and 123 transitions. [2025-03-13 21:48:52,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1039 transitions, 20569 flow [2025-03-13 21:48:56,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 1039 transitions, 20405 flow, removed 48 selfloop flow, removed 2 redundant places. [2025-03-13 21:48:56,975 INFO L231 Difference]: Finished difference. Result has 196 places, 947 transitions, 19556 flow [2025-03-13 21:48:56,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=16617, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=559, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19556, PETRI_PLACES=196, PETRI_TRANSITIONS=947} [2025-03-13 21:48:56,976 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 161 predicate places. [2025-03-13 21:48:56,976 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 947 transitions, 19556 flow [2025-03-13 21:48:56,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 21:48:56,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:56,977 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] [2025-03-13 21:48:56,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-13 21:48:57,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:57,177 INFO L396 AbstractCegarLoop]: === Iteration 15 === 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 21:48:57,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:57,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1623394721, now seen corresponding path program 10 times [2025-03-13 21:48:57,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:57,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879058387] [2025-03-13 21:48:57,178 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:48:57,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:57,182 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:57,183 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-03-13 21:48:57,183 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:48:57,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:57,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:57,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879058387] [2025-03-13 21:48:57,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879058387] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:57,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022832071] [2025-03-13 21:48:57,222 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:48:57,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:57,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:57,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:57,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-13 21:48:57,265 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:48:57,273 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-03-13 21:48:57,273 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:48:57,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:57,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:48:57,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:57,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:57,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022832071] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:57,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:57,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 12 [2025-03-13 21:48:57,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705659608] [2025-03-13 21:48:57,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:57,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:48:57,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:57,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:48:57,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:48:57,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-13 21:48:57,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 947 transitions, 19556 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 21:48:57,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:57,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-13 21:48:57,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:49:03,329 INFO L124 PetriNetUnfolderBase]: 22584/31940 cut-off events. [2025-03-13 21:49:03,329 INFO L125 PetriNetUnfolderBase]: For 559386/559386 co-relation queries the response was YES. [2025-03-13 21:49:03,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220941 conditions, 31940 events. 22584/31940 cut-off events. For 559386/559386 co-relation queries the response was YES. Maximal size of possible extension queue 1325. Compared 195767 event pairs, 3144 based on Foata normal form. 22/31962 useless extension candidates. Maximal degree in co-relation 220848. Up to 7529 conditions per place. [2025-03-13 21:49:03,829 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 627 selfloop transitions, 622 changer transitions 0/1250 dead transitions. [2025-03-13 21:49:03,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1250 transitions, 26826 flow [2025-03-13 21:49:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:49:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:49:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 186 transitions. [2025-03-13 21:49:03,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43356643356643354 [2025-03-13 21:49:03,831 INFO L175 Difference]: Start difference. First operand has 196 places, 947 transitions, 19556 flow. Second operand 13 states and 186 transitions. [2025-03-13 21:49:03,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1250 transitions, 26826 flow [2025-03-13 21:49:10,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 1250 transitions, 26483 flow, removed 58 selfloop flow, removed 3 redundant places. [2025-03-13 21:49:10,296 INFO L231 Difference]: Finished difference. Result has 211 places, 1105 transitions, 23792 flow [2025-03-13 21:49:10,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=19290, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=23792, PETRI_PLACES=211, PETRI_TRANSITIONS=1105} [2025-03-13 21:49:10,296 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 176 predicate places. [2025-03-13 21:49:10,297 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 1105 transitions, 23792 flow [2025-03-13 21:49:10,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 21:49:10,297 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:49:10,297 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] [2025-03-13 21:49:10,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-13 21:49:10,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:49:10,497 INFO L396 AbstractCegarLoop]: === Iteration 16 === 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 21:49:10,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:49:10,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1432136681, now seen corresponding path program 11 times [2025-03-13 21:49:10,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:49:10,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676636247] [2025-03-13 21:49:10,498 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:49:10,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:49:10,503 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:49:10,510 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:49:10,511 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:49:10,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:49:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:49:10,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:49:10,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676636247] [2025-03-13 21:49:10,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676636247] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:49:10,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312479848] [2025-03-13 21:49:10,579 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:49:10,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:49:10,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:49:10,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:49:10,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-13 21:49:10,628 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-13 21:49:10,644 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:49:10,645 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:49:10,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:49:10,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:49:10,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:49:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:49:10,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:49:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:49:10,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312479848] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:49:10,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:49:10,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2025-03-13 21:49:10,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217523571] [2025-03-13 21:49:10,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:49:10,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:49:10,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:49:10,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:49:10,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:49:10,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-13 21:49:10,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 1105 transitions, 23792 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 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 21:49:10,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:49:10,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-13 21:49:10,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand