./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-2.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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 02:28:30,604 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 02:28:30,659 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-04 02:28:30,663 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 02:28:30,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 02:28:30,678 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 02:28:30,679 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 02:28:30,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 02:28:30,679 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 02:28:30,679 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 02:28:30,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 02:28:30,679 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 02:28:30,679 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 02:28:30,679 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 02:28:30,680 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 02:28:30,680 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 02:28:30,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:28:30,681 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 02:28:30,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 02:28:30,681 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 02:28:30,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 02:28:30,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 02:28:30,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 02:28:30,681 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 02:28:30,681 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 02:28:30,681 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 02:28:30,681 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 02:28:30,681 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 -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2025-03-04 02:28:30,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 02:28:30,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 02:28:30,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 02:28:30,918 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 02:28:30,918 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 02:28:30,919 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-2.wvr.c [2025-03-04 02:28:32,091 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047e0c23e/371b4c36d41745009463c760528ebd14/FLAGc395933b5 [2025-03-04 02:28:32,321 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 02:28:32,322 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2025-03-04 02:28:32,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047e0c23e/371b4c36d41745009463c760528ebd14/FLAGc395933b5 [2025-03-04 02:28:32,657 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047e0c23e/371b4c36d41745009463c760528ebd14 [2025-03-04 02:28:32,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 02:28:32,661 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 02:28:32,662 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 02:28:32,662 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 02:28:32,665 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 02:28:32,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,666 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48e657c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32, skipping insertion in model container [2025-03-04 02:28:32,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,679 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 02:28:32,806 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/unroll-2.wvr.c[2454,2467] [2025-03-04 02:28:32,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:28:32,825 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 02:28:32,840 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/unroll-2.wvr.c[2454,2467] [2025-03-04 02:28:32,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:28:32,857 INFO L204 MainTranslator]: Completed translation [2025-03-04 02:28:32,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32 WrapperNode [2025-03-04 02:28:32,859 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 02:28:32,859 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 02:28:32,860 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 02:28:32,860 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 02:28:32,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,887 INFO L138 Inliner]: procedures = 23, calls = 22, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 118 [2025-03-04 02:28:32,887 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 02:28:32,888 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 02:28:32,888 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 02:28:32,888 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 02:28:32,895 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,897 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,915 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]. [2025-03-04 02:28:32,917 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,917 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,922 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,926 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,927 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,927 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,928 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 02:28:32,929 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 02:28:32,929 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 02:28:32,929 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 02:28:32,931 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (1/1) ... [2025-03-04 02:28:32,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:28:32,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:32,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-04 02:28:32,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-04 02:28:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 02:28:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 02:28:32,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 02:28:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 02:28:32,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 02:28:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 02:28:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 02:28:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 02:28:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 02:28:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 02:28:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 02:28:32,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 02:28:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 02:28:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 02:28:32,974 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 02:28:33,033 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 02:28:33,035 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 02:28:33,252 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 02:28:33,253 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 02:28:33,411 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 02:28:33,413 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 02:28:33,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:28:33 BoogieIcfgContainer [2025-03-04 02:28:33,413 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 02:28:33,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 02:28:33,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 02:28:33,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 02:28:33,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 02:28:32" (1/3) ... [2025-03-04 02:28:33,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25376117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:28:33, skipping insertion in model container [2025-03-04 02:28:33,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:28:32" (2/3) ... [2025-03-04 02:28:33,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25376117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:28:33, skipping insertion in model container [2025-03-04 02:28:33,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:28:33" (3/3) ... [2025-03-04 02:28:33,421 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2025-03-04 02:28:33,432 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 02:28:33,433 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-2.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-04 02:28:33,433 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 02:28:33,473 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-04 02:28:33,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-03-04 02:28:33,518 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-03-04 02:28:33,521 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 02:28:33,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-03-04 02:28:33,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-03-04 02:28:33,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-03-04 02:28:33,530 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:28:33,541 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;@7c74339f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:28:33,541 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-04 02:28:33,553 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:28:33,553 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-03-04 02:28:33,553 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 02:28:33,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:33,554 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:33,554 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:33,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2048524681, now seen corresponding path program 1 times [2025-03-04 02:28:33,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:33,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722642218] [2025-03-04 02:28:33,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:28:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:33,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 02:28:33,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:28:33,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:28:33,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:28:33,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:33,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722642218] [2025-03-04 02:28:33,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722642218] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:28:33,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:28:33,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 02:28:33,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139028374] [2025-03-04 02:28:33,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:28:33,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 02:28:33,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:33,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 02:28:33,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 02:28:33,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:33,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:33,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:33,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:33,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:33,977 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2025-03-04 02:28:33,978 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-03-04 02:28:33,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 117 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2025-03-04 02:28:33,980 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2025-03-04 02:28:33,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2025-03-04 02:28:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 02:28:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 02:28:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2025-03-04 02:28:33,990 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-04 02:28:33,991 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2025-03-04 02:28:33,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2025-03-04 02:28:33,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 02:28:33,995 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2025-03-04 02:28:33,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2025-03-04 02:28:34,000 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-03-04 02:28:34,002 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2025-03-04 02:28:34,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:34,002 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:34,002 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:34,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 02:28:34,002 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:34,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:34,003 INFO L85 PathProgramCache]: Analyzing trace with hash -891979156, now seen corresponding path program 1 times [2025-03-04 02:28:34,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:34,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359982348] [2025-03-04 02:28:34,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:28:34,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:34,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:28:34,041 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:28:34,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:28:34,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:34,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:34,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359982348] [2025-03-04 02:28:34,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359982348] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:28:34,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:28:34,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 02:28:34,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454732030] [2025-03-04 02:28:34,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:28:34,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 02:28:34,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:34,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 02:28:34,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 02:28:34,165 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:34,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:34,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:34,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:34,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:34,234 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2025-03-04 02:28:34,234 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 02:28:34,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 126 events. 69/126 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 315 event pairs, 22 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 255. Up to 72 conditions per place. [2025-03-04 02:28:34,236 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 24 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2025-03-04 02:28:34,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 29 transitions, 131 flow [2025-03-04 02:28:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 02:28:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 02:28:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2025-03-04 02:28:34,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2025-03-04 02:28:34,239 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 37 transitions. [2025-03-04 02:28:34,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 29 transitions, 131 flow [2025-03-04 02:28:34,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 29 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-04 02:28:34,240 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2025-03-04 02:28:34,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2025-03-04 02:28:34,241 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2025-03-04 02:28:34,241 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2025-03-04 02:28:34,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:34,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:34,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:34,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 02:28:34,242 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:34,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1686845443, now seen corresponding path program 1 times [2025-03-04 02:28:34,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:34,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077850620] [2025-03-04 02:28:34,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:28:34,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:34,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 02:28:34,265 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:28:34,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:28:34,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:34,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:34,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077850620] [2025-03-04 02:28:34,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077850620] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:28:34,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:28:34,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 02:28:34,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577044495] [2025-03-04 02:28:34,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:28:34,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 02:28:34,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:34,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 02:28:34,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 02:28:34,400 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:34,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:34,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:34,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:34,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:34,539 INFO L124 PetriNetUnfolderBase]: 78/155 cut-off events. [2025-03-04 02:28:34,539 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-03-04 02:28:34,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 155 events. 78/155 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 487 event pairs, 24 based on Foata normal form. 9/163 useless extension candidates. Maximal degree in co-relation 353. Up to 81 conditions per place. [2025-03-04 02:28:34,540 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 29 selfloop transitions, 4 changer transitions 7/41 dead transitions. [2025-03-04 02:28:34,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 202 flow [2025-03-04 02:28:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 02:28:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 02:28:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2025-03-04 02:28:34,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2025-03-04 02:28:34,545 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 53 transitions. [2025-03-04 02:28:34,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 202 flow [2025-03-04 02:28:34,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 02:28:34,547 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2025-03-04 02:28:34,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2025-03-04 02:28:34,547 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2025-03-04 02:28:34,547 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2025-03-04 02:28:34,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:34,547 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:34,547 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:34,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 02:28:34,548 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:34,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:34,548 INFO L85 PathProgramCache]: Analyzing trace with hash 598427304, now seen corresponding path program 1 times [2025-03-04 02:28:34,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:34,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738497317] [2025-03-04 02:28:34,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:28:34,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:34,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 02:28:34,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:28:34,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:28:34,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:34,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:34,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738497317] [2025-03-04 02:28:34,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738497317] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:34,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631575619] [2025-03-04 02:28:34,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:28:34,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:34,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:34,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:28:34,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 02:28:34,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 02:28:34,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:28:34,709 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:28:34,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:34,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 02:28:34,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:28:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:34,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:28:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631575619] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:34,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-04 02:28:34,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-03-04 02:28:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032165987] [2025-03-04 02:28:34,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:28:34,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:28:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:34,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:28:34,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-04 02:28:34,794 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:34,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:34,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:34,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:34,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:34,881 INFO L124 PetriNetUnfolderBase]: 81/156 cut-off events. [2025-03-04 02:28:34,881 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2025-03-04 02:28:34,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 156 events. 81/156 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 449 event pairs, 22 based on Foata normal form. 5/160 useless extension candidates. Maximal degree in co-relation 461. Up to 91 conditions per place. [2025-03-04 02:28:34,882 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 4 changer transitions 3/36 dead transitions. [2025-03-04 02:28:34,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 214 flow [2025-03-04 02:28:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 02:28:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 02:28:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2025-03-04 02:28:34,885 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-03-04 02:28:34,886 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 45 transitions. [2025-03-04 02:28:34,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 214 flow [2025-03-04 02:28:34,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 204 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-04 02:28:34,888 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 114 flow [2025-03-04 02:28:34,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2025-03-04 02:28:34,889 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2025-03-04 02:28:34,890 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 114 flow [2025-03-04 02:28:34,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:34,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:34,890 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:34,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 02:28:35,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:35,094 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:35,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1414100504, now seen corresponding path program 2 times [2025-03-04 02:28:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:35,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302038895] [2025-03-04 02:28:35,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:28:35,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:35,101 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-04 02:28:35,109 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:28:35,109 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:28:35,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:35,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302038895] [2025-03-04 02:28:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302038895] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:28:35,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:28:35,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 02:28:35,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998304589] [2025-03-04 02:28:35,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:28:35,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:28:35,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:35,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:28:35,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 02:28:35,177 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:35,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:35,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:35,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:35,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:35,255 INFO L124 PetriNetUnfolderBase]: 91/179 cut-off events. [2025-03-04 02:28:35,255 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2025-03-04 02:28:35,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 179 events. 91/179 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 546 event pairs, 35 based on Foata normal form. 4/182 useless extension candidates. Maximal degree in co-relation 567. Up to 116 conditions per place. [2025-03-04 02:28:35,257 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 30 selfloop transitions, 6 changer transitions 3/40 dead transitions. [2025-03-04 02:28:35,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 262 flow [2025-03-04 02:28:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 02:28:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 02:28:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2025-03-04 02:28:35,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-03-04 02:28:35,260 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 114 flow. Second operand 4 states and 42 transitions. [2025-03-04 02:28:35,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 262 flow [2025-03-04 02:28:35,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 255 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-04 02:28:35,262 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 147 flow [2025-03-04 02:28:35,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2025-03-04 02:28:35,263 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2025-03-04 02:28:35,264 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 147 flow [2025-03-04 02:28:35,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:35,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:35,264 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:35,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-04 02:28:35,265 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:35,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:35,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2019221699, now seen corresponding path program 2 times [2025-03-04 02:28:35,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:35,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692437426] [2025-03-04 02:28:35,265 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:28:35,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:35,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-04 02:28:35,280 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:28:35,281 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:28:35,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:35,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:35,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692437426] [2025-03-04 02:28:35,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692437426] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:35,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005284104] [2025-03-04 02:28:35,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:28:35,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:35,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:35,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:28:35,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 02:28:35,413 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-04 02:28:35,430 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:28:35,430 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:28:35,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:35,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 02:28:35,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:28:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:35,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:28:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:35,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005284104] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:28:35,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:28:35,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-04 02:28:35,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256919668] [2025-03-04 02:28:35,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:28:35,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-04 02:28:35,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:35,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-04 02:28:35,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-03-04 02:28:35,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:35,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:35,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:35,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:35,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:35,649 INFO L124 PetriNetUnfolderBase]: 124/241 cut-off events. [2025-03-04 02:28:35,649 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2025-03-04 02:28:35,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 241 events. 124/241 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 892 event pairs, 29 based on Foata normal form. 18/258 useless extension candidates. Maximal degree in co-relation 917. Up to 117 conditions per place. [2025-03-04 02:28:35,653 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 10 changer transitions 6/58 dead transitions. [2025-03-04 02:28:35,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 58 transitions, 455 flow [2025-03-04 02:28:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 02:28:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 02:28:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2025-03-04 02:28:35,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-04 02:28:35,655 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 147 flow. Second operand 6 states and 65 transitions. [2025-03-04 02:28:35,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 58 transitions, 455 flow [2025-03-04 02:28:35,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 58 transitions, 418 flow, removed 13 selfloop flow, removed 1 redundant places. [2025-03-04 02:28:35,659 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 233 flow [2025-03-04 02:28:35,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2025-03-04 02:28:35,661 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2025-03-04 02:28:35,662 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 233 flow [2025-03-04 02:28:35,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:35,662 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:35,662 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:35,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 02:28:35,862 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,SelfDestructingSolverStorable5 [2025-03-04 02:28:35,863 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:35,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:35,863 INFO L85 PathProgramCache]: Analyzing trace with hash -509004565, now seen corresponding path program 3 times [2025-03-04 02:28:35,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:35,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54543733] [2025-03-04 02:28:35,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:28:35,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:35,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-03-04 02:28:35,889 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:28:35,893 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:28:35,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:35,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:35,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54543733] [2025-03-04 02:28:35,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54543733] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:35,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313929634] [2025-03-04 02:28:35,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:28:35,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:35,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:35,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:28:35,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 02:28:36,018 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-03-04 02:28:36,035 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:28:36,035 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:28:36,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:36,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 02:28:36,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:28:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:36,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:28:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:36,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313929634] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:36,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-04 02:28:36,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-03-04 02:28:36,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717249322] [2025-03-04 02:28:36,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:28:36,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:28:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:36,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:28:36,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-04 02:28:36,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:36,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 233 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:36,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:36,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:36,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:36,218 INFO L124 PetriNetUnfolderBase]: 125/237 cut-off events. [2025-03-04 02:28:36,218 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2025-03-04 02:28:36,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1017 conditions, 237 events. 125/237 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 800 event pairs, 42 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 991. Up to 152 conditions per place. [2025-03-04 02:28:36,221 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 31 selfloop transitions, 8 changer transitions 4/44 dead transitions. [2025-03-04 02:28:36,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 371 flow [2025-03-04 02:28:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 02:28:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 02:28:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-03-04 02:28:36,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-03-04 02:28:36,223 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 233 flow. Second operand 4 states and 44 transitions. [2025-03-04 02:28:36,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 371 flow [2025-03-04 02:28:36,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 367 flow, removed 2 selfloop flow, removed 0 redundant places. [2025-03-04 02:28:36,228 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 267 flow [2025-03-04 02:28:36,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2025-03-04 02:28:36,229 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2025-03-04 02:28:36,230 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 267 flow [2025-03-04 02:28:36,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:36,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:36,230 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:36,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 02:28:36,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:36,431 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:36,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:36,431 INFO L85 PathProgramCache]: Analyzing trace with hash -364805502, now seen corresponding path program 3 times [2025-03-04 02:28:36,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:36,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668692372] [2025-03-04 02:28:36,432 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:28:36,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:36,438 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-04 02:28:36,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 02:28:36,453 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:28:36,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 02:28:36,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:36,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668692372] [2025-03-04 02:28:36,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668692372] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:28:36,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:28:36,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 02:28:36,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948983995] [2025-03-04 02:28:36,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:28:36,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:28:36,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:36,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:28:36,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-04 02:28:36,506 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:36,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:36,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:36,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:36,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:36,575 INFO L124 PetriNetUnfolderBase]: 113/201 cut-off events. [2025-03-04 02:28:36,575 INFO L125 PetriNetUnfolderBase]: For 740/740 co-relation queries the response was YES. [2025-03-04 02:28:36,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 201 events. 113/201 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 584 event pairs, 40 based on Foata normal form. 7/207 useless extension candidates. Maximal degree in co-relation 892. Up to 143 conditions per place. [2025-03-04 02:28:36,577 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 32 selfloop transitions, 13 changer transitions 1/47 dead transitions. [2025-03-04 02:28:36,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 447 flow [2025-03-04 02:28:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 02:28:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 02:28:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2025-03-04 02:28:36,578 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5125 [2025-03-04 02:28:36,578 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 267 flow. Second operand 4 states and 41 transitions. [2025-03-04 02:28:36,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 447 flow [2025-03-04 02:28:36,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 395 flow, removed 16 selfloop flow, removed 4 redundant places. [2025-03-04 02:28:36,581 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 295 flow [2025-03-04 02:28:36,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2025-03-04 02:28:36,582 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2025-03-04 02:28:36,582 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 295 flow [2025-03-04 02:28:36,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:36,582 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:36,582 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:36,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-04 02:28:36,583 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:36,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash 606592287, now seen corresponding path program 1 times [2025-03-04 02:28:36,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:36,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483229698] [2025-03-04 02:28:36,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:28:36,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:36,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 02:28:36,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 02:28:36,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:28:36,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:28:37,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:37,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483229698] [2025-03-04 02:28:37,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483229698] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:37,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815821301] [2025-03-04 02:28:37,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:28:37,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:37,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:37,018 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) [2025-03-04 02:28:37,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 02:28:37,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 02:28:37,068 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 02:28:37,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:28:37,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:37,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-04 02:28:37,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:28:37,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-04 02:28:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:28:37,230 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:28:37,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 90 [2025-03-04 02:28:37,490 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2025-03-04 02:28:37,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 419 treesize of output 360 [2025-03-04 02:28:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:28:39,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815821301] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:28:39,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:28:39,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-03-04 02:28:39,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472137980] [2025-03-04 02:28:39,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:28:39,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-04 02:28:39,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:39,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-04 02:28:39,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-03-04 02:28:39,716 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:39,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 295 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:39,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:39,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:39,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:40,015 INFO L124 PetriNetUnfolderBase]: 289/511 cut-off events. [2025-03-04 02:28:40,016 INFO L125 PetriNetUnfolderBase]: For 1349/1349 co-relation queries the response was YES. [2025-03-04 02:28:40,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2281 conditions, 511 events. 289/511 cut-off events. For 1349/1349 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1932 event pairs, 36 based on Foata normal form. 2/511 useless extension candidates. Maximal degree in co-relation 1997. Up to 225 conditions per place. [2025-03-04 02:28:40,019 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 52 selfloop transitions, 23 changer transitions 43/119 dead transitions. [2025-03-04 02:28:40,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 119 transitions, 1082 flow [2025-03-04 02:28:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 02:28:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 02:28:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2025-03-04 02:28:40,022 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2025-03-04 02:28:40,022 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 295 flow. Second operand 11 states and 115 transitions. [2025-03-04 02:28:40,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 119 transitions, 1082 flow [2025-03-04 02:28:40,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 119 transitions, 1014 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-04 02:28:40,027 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 482 flow [2025-03-04 02:28:40,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=482, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2025-03-04 02:28:40,027 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2025-03-04 02:28:40,027 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 482 flow [2025-03-04 02:28:40,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:40,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:40,028 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:40,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-04 02:28:40,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:40,229 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:40,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash -639397782, now seen corresponding path program 2 times [2025-03-04 02:28:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138098539] [2025-03-04 02:28:40,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:28:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:40,238 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-04 02:28:40,257 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 02:28:40,258 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:28:40,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:28:40,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:40,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138098539] [2025-03-04 02:28:40,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138098539] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:40,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575636266] [2025-03-04 02:28:40,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:28:40,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:40,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:40,902 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) [2025-03-04 02:28:40,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 02:28:40,940 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-04 02:28:40,955 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 02:28:40,955 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:28:40,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:40,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:28:40,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:28:41,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:28:41,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2025-03-04 02:28:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:41,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:28:41,146 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-03-04 02:28:41,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-03-04 02:28:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:41,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575636266] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:28:41,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:28:41,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 15 [2025-03-04 02:28:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923997930] [2025-03-04 02:28:41,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:28:41,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-04 02:28:41,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:41,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-04 02:28:41,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-03-04 02:28:41,177 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:41,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 482 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:41,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:41,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:41,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:41,525 INFO L124 PetriNetUnfolderBase]: 267/480 cut-off events. [2025-03-04 02:28:41,525 INFO L125 PetriNetUnfolderBase]: For 1451/1451 co-relation queries the response was YES. [2025-03-04 02:28:41,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2300 conditions, 480 events. 267/480 cut-off events. For 1451/1451 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1784 event pairs, 43 based on Foata normal form. 1/479 useless extension candidates. Maximal degree in co-relation 2254. Up to 312 conditions per place. [2025-03-04 02:28:41,528 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 74 selfloop transitions, 36 changer transitions 1/112 dead transitions. [2025-03-04 02:28:41,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 112 transitions, 1111 flow [2025-03-04 02:28:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-04 02:28:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-04 02:28:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 124 transitions. [2025-03-04 02:28:41,530 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2025-03-04 02:28:41,530 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 482 flow. Second operand 15 states and 124 transitions. [2025-03-04 02:28:41,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 112 transitions, 1111 flow [2025-03-04 02:28:41,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 112 transitions, 1036 flow, removed 30 selfloop flow, removed 4 redundant places. [2025-03-04 02:28:41,534 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 754 flow [2025-03-04 02:28:41,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=754, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2025-03-04 02:28:41,534 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2025-03-04 02:28:41,534 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 754 flow [2025-03-04 02:28:41,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:41,535 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:41,535 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:41,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-04 02:28:41,739 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,SelfDestructingSolverStorable9 [2025-03-04 02:28:41,739 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:41,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash -473516448, now seen corresponding path program 3 times [2025-03-04 02:28:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:41,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558641683] [2025-03-04 02:28:41,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:28:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:41,745 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-04 02:28:41,753 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 02:28:41,754 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:28:41,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:28:42,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:42,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558641683] [2025-03-04 02:28:42,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558641683] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:42,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118684805] [2025-03-04 02:28:42,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:28:42,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:42,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:42,273 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) [2025-03-04 02:28:42,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 02:28:42,314 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-04 02:28:42,329 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 02:28:42,329 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:28:42,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:42,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:28:42,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:28:42,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:28:42,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2025-03-04 02:28:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:28:42,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:28:42,518 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-03-04 02:28:42,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-03-04 02:28:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:42,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118684805] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:28:42,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:28:42,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 15 [2025-03-04 02:28:42,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952010956] [2025-03-04 02:28:42,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:28:42,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-04 02:28:42,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:42,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-04 02:28:42,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-03-04 02:28:42,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:42,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 754 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:42,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:42,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:42,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:42,904 INFO L124 PetriNetUnfolderBase]: 357/639 cut-off events. [2025-03-04 02:28:42,905 INFO L125 PetriNetUnfolderBase]: For 1877/1877 co-relation queries the response was YES. [2025-03-04 02:28:42,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3054 conditions, 639 events. 357/639 cut-off events. For 1877/1877 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2591 event pairs, 62 based on Foata normal form. 1/639 useless extension candidates. Maximal degree in co-relation 2617. Up to 447 conditions per place. [2025-03-04 02:28:42,909 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 90 selfloop transitions, 36 changer transitions 1/128 dead transitions. [2025-03-04 02:28:42,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 128 transitions, 1366 flow [2025-03-04 02:28:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-04 02:28:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-04 02:28:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2025-03-04 02:28:42,910 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2025-03-04 02:28:42,910 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 754 flow. Second operand 15 states and 122 transitions. [2025-03-04 02:28:42,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 128 transitions, 1366 flow [2025-03-04 02:28:42,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 1279 flow, removed 35 selfloop flow, removed 3 redundant places. [2025-03-04 02:28:42,916 INFO L231 Difference]: Finished difference. Result has 78 places, 91 transitions, 962 flow [2025-03-04 02:28:42,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=962, PETRI_PLACES=78, PETRI_TRANSITIONS=91} [2025-03-04 02:28:42,916 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2025-03-04 02:28:42,916 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 91 transitions, 962 flow [2025-03-04 02:28:42,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:42,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:42,916 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:42,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-04 02:28:43,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:43,117 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:43,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1082920418, now seen corresponding path program 4 times [2025-03-04 02:28:43,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:43,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075715799] [2025-03-04 02:28:43,118 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:28:43,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:43,122 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:28:43,132 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:28:43,133 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:28:43,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:43,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:43,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075715799] [2025-03-04 02:28:43,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075715799] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:43,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971852572] [2025-03-04 02:28:43,241 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:28:43,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:43,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:43,243 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) [2025-03-04 02:28:43,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 02:28:43,279 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:28:43,295 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:28:43,295 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:28:43,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:43,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:28:43,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:28:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:43,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:28:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971852572] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:28:43,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:28:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-03-04 02:28:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935584279] [2025-03-04 02:28:43,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:28:43,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-04 02:28:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:43,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-04 02:28:43,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-03-04 02:28:43,491 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:43,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 91 transitions, 962 flow. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:43,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:43,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:43,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:55,951 INFO L124 PetriNetUnfolderBase]: 550/995 cut-off events. [2025-03-04 02:28:55,951 INFO L125 PetriNetUnfolderBase]: For 2802/2802 co-relation queries the response was YES. [2025-03-04 02:28:55,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4682 conditions, 995 events. 550/995 cut-off events. For 2802/2802 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4553 event pairs, 69 based on Foata normal form. 10/1005 useless extension candidates. Maximal degree in co-relation 4067. Up to 341 conditions per place. [2025-03-04 02:28:55,958 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 124 selfloop transitions, 45 changer transitions 0/170 dead transitions. [2025-03-04 02:28:55,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 170 transitions, 1909 flow [2025-03-04 02:28:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 02:28:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 02:28:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2025-03-04 02:28:55,961 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2025-03-04 02:28:55,961 INFO L175 Difference]: Start difference. First operand has 78 places, 91 transitions, 962 flow. Second operand 11 states and 113 transitions. [2025-03-04 02:28:55,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 170 transitions, 1909 flow [2025-03-04 02:28:55,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 170 transitions, 1722 flow, removed 82 selfloop flow, removed 6 redundant places. [2025-03-04 02:28:55,970 INFO L231 Difference]: Finished difference. Result has 89 places, 110 transitions, 1229 flow [2025-03-04 02:28:55,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1229, PETRI_PLACES=89, PETRI_TRANSITIONS=110} [2025-03-04 02:28:55,971 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2025-03-04 02:28:55,972 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 110 transitions, 1229 flow [2025-03-04 02:28:55,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:55,972 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:55,972 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:55,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-04 02:28:56,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:56,173 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:56,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:56,174 INFO L85 PathProgramCache]: Analyzing trace with hash 627591181, now seen corresponding path program 5 times [2025-03-04 02:28:56,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:56,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327947620] [2025-03-04 02:28:56,174 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:28:56,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:56,180 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:28:56,197 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:28:56,197 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:28:56,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:56,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:56,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327947620] [2025-03-04 02:28:56,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327947620] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:56,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974219060] [2025-03-04 02:28:56,312 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:28:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:56,314 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) [2025-03-04 02:28:56,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 02:28:56,351 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:28:56,391 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:28:56,391 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:28:56,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:56,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:28:56,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:28:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:56,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:28:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:56,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974219060] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:28:56,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:28:56,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-03-04 02:28:56,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341018314] [2025-03-04 02:28:56,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:28:56,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-04 02:28:56,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:56,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-04 02:28:56,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-04 02:28:56,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:56,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 110 transitions, 1229 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:56,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:56,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:56,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:57,053 INFO L124 PetriNetUnfolderBase]: 558/1065 cut-off events. [2025-03-04 02:28:57,054 INFO L125 PetriNetUnfolderBase]: For 5327/5327 co-relation queries the response was YES. [2025-03-04 02:28:57,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5332 conditions, 1065 events. 558/1065 cut-off events. For 5327/5327 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5425 event pairs, 56 based on Foata normal form. 24/1089 useless extension candidates. Maximal degree in co-relation 4965. Up to 365 conditions per place. [2025-03-04 02:28:57,061 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 138 selfloop transitions, 85 changer transitions 22/246 dead transitions. [2025-03-04 02:28:57,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 246 transitions, 2784 flow [2025-03-04 02:28:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-04 02:28:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-04 02:28:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 172 transitions. [2025-03-04 02:28:57,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2025-03-04 02:28:57,067 INFO L175 Difference]: Start difference. First operand has 89 places, 110 transitions, 1229 flow. Second operand 21 states and 172 transitions. [2025-03-04 02:28:57,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 246 transitions, 2784 flow [2025-03-04 02:28:57,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 246 transitions, 2656 flow, removed 34 selfloop flow, removed 3 redundant places. [2025-03-04 02:28:57,083 INFO L231 Difference]: Finished difference. Result has 114 places, 159 transitions, 1890 flow [2025-03-04 02:28:57,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1890, PETRI_PLACES=114, PETRI_TRANSITIONS=159} [2025-03-04 02:28:57,084 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2025-03-04 02:28:57,084 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 159 transitions, 1890 flow [2025-03-04 02:28:57,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:57,084 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:57,084 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:57,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-04 02:28:57,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-04 02:28:57,289 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:57,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash 217552541, now seen corresponding path program 6 times [2025-03-04 02:28:57,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:57,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768166973] [2025-03-04 02:28:57,290 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:28:57,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:57,295 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:28:57,310 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:28:57,310 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:28:57,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:57,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:57,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768166973] [2025-03-04 02:28:57,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768166973] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:57,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568131401] [2025-03-04 02:28:57,437 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:28:57,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:57,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:57,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:28:57,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 02:28:57,475 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:28:57,491 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:28:57,491 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:28:57,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:57,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:28:57,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:28:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:57,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:28:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:57,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568131401] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:28:57,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:28:57,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-03-04 02:28:57,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732189403] [2025-03-04 02:28:57,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:28:57,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:28:57,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:57,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:28:57,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:28:57,662 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:57,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 159 transitions, 1890 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:57,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:57,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:57,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:58,355 INFO L124 PetriNetUnfolderBase]: 562/1061 cut-off events. [2025-03-04 02:28:58,355 INFO L125 PetriNetUnfolderBase]: For 7281/7281 co-relation queries the response was YES. [2025-03-04 02:28:58,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6270 conditions, 1061 events. 562/1061 cut-off events. For 7281/7281 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5356 event pairs, 98 based on Foata normal form. 68/1129 useless extension candidates. Maximal degree in co-relation 6154. Up to 441 conditions per place. [2025-03-04 02:28:58,363 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 113 selfloop transitions, 144 changer transitions 5/263 dead transitions. [2025-03-04 02:28:58,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 263 transitions, 3575 flow [2025-03-04 02:28:58,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-04 02:28:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-04 02:28:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 175 transitions. [2025-03-04 02:28:58,364 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2025-03-04 02:28:58,364 INFO L175 Difference]: Start difference. First operand has 114 places, 159 transitions, 1890 flow. Second operand 19 states and 175 transitions. [2025-03-04 02:28:58,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 263 transitions, 3575 flow [2025-03-04 02:28:58,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 263 transitions, 2998 flow, removed 249 selfloop flow, removed 7 redundant places. [2025-03-04 02:28:58,388 INFO L231 Difference]: Finished difference. Result has 126 places, 209 transitions, 2753 flow [2025-03-04 02:28:58,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2753, PETRI_PLACES=126, PETRI_TRANSITIONS=209} [2025-03-04 02:28:58,388 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2025-03-04 02:28:58,389 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 209 transitions, 2753 flow [2025-03-04 02:28:58,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:58,389 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:58,389 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:58,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-04 02:28:58,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-04 02:28:58,592 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:28:58,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:28:58,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1243255497, now seen corresponding path program 7 times [2025-03-04 02:28:58,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:28:58,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876419425] [2025-03-04 02:28:58,593 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:28:58,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:28:58,600 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 02:28:58,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:28:58,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:28:58,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:58,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:28:58,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876419425] [2025-03-04 02:28:58,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876419425] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:28:58,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677302245] [2025-03-04 02:28:58,756 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:28:58,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:28:58,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:28:58,758 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:28:58,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 02:28:58,797 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 02:28:58,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:28:58,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:28:58,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:28:58,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:28:58,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:28:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:58,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:28:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:28:58,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677302245] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:28:58,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:28:58,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-03-04 02:28:58,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135672397] [2025-03-04 02:28:58,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:28:58,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-04 02:28:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:28:58,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-04 02:28:58,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2025-03-04 02:28:58,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:28:58,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 209 transitions, 2753 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:58,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:28:58,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:28:58,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:28:59,826 INFO L124 PetriNetUnfolderBase]: 610/1211 cut-off events. [2025-03-04 02:28:59,827 INFO L125 PetriNetUnfolderBase]: For 7546/7546 co-relation queries the response was YES. [2025-03-04 02:28:59,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7055 conditions, 1211 events. 610/1211 cut-off events. For 7546/7546 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6646 event pairs, 64 based on Foata normal form. 19/1230 useless extension candidates. Maximal degree in co-relation 6773. Up to 346 conditions per place. [2025-03-04 02:28:59,835 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 136 selfloop transitions, 168 changer transitions 9/314 dead transitions. [2025-03-04 02:28:59,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 314 transitions, 4181 flow [2025-03-04 02:28:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-04 02:28:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-03-04 02:28:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 236 transitions. [2025-03-04 02:28:59,837 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2025-03-04 02:28:59,837 INFO L175 Difference]: Start difference. First operand has 126 places, 209 transitions, 2753 flow. Second operand 31 states and 236 transitions. [2025-03-04 02:28:59,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 314 transitions, 4181 flow [2025-03-04 02:28:59,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 314 transitions, 3715 flow, removed 198 selfloop flow, removed 4 redundant places. [2025-03-04 02:28:59,869 INFO L231 Difference]: Finished difference. Result has 157 places, 239 transitions, 3136 flow [2025-03-04 02:28:59,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3136, PETRI_PLACES=157, PETRI_TRANSITIONS=239} [2025-03-04 02:28:59,869 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2025-03-04 02:28:59,869 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 239 transitions, 3136 flow [2025-03-04 02:28:59,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:28:59,870 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:28:59,870 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:28:59,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-04 02:29:00,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-04 02:29:00,071 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:29:00,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:29:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1961413637, now seen corresponding path program 8 times [2025-03-04 02:29:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:29:00,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893433688] [2025-03-04 02:29:00,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:29:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:29:00,076 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:00,090 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:00,090 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:29:00,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:29:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893433688] [2025-03-04 02:29:00,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893433688] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:29:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759183381] [2025-03-04 02:29:00,274 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:29:00,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:00,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:29:00,276 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:29:00,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 02:29:00,312 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:00,329 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:00,330 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:29:00,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:00,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:29:00,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:29:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:00,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:29:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:00,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759183381] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:29:00,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:29:00,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2025-03-04 02:29:00,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861418917] [2025-03-04 02:29:00,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:29:00,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:29:00,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:29:00,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:29:00,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:29:00,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:29:00,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 239 transitions, 3136 flow. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:00,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:29:00,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:29:00,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:29:02,696 INFO L124 PetriNetUnfolderBase]: 816/1588 cut-off events. [2025-03-04 02:29:02,696 INFO L125 PetriNetUnfolderBase]: For 9537/9537 co-relation queries the response was YES. [2025-03-04 02:29:02,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9870 conditions, 1588 events. 816/1588 cut-off events. For 9537/9537 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9262 event pairs, 145 based on Foata normal form. 43/1631 useless extension candidates. Maximal degree in co-relation 9594. Up to 726 conditions per place. [2025-03-04 02:29:02,708 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 220 selfloop transitions, 222 changer transitions 5/448 dead transitions. [2025-03-04 02:29:02,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 448 transitions, 6287 flow [2025-03-04 02:29:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-04 02:29:02,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-04 02:29:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 334 transitions. [2025-03-04 02:29:02,710 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3795454545454545 [2025-03-04 02:29:02,710 INFO L175 Difference]: Start difference. First operand has 157 places, 239 transitions, 3136 flow. Second operand 44 states and 334 transitions. [2025-03-04 02:29:02,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 448 transitions, 6287 flow [2025-03-04 02:29:02,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 448 transitions, 5798 flow, removed 87 selfloop flow, removed 9 redundant places. [2025-03-04 02:29:02,746 INFO L231 Difference]: Finished difference. Result has 208 places, 355 transitions, 5143 flow [2025-03-04 02:29:02,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5143, PETRI_PLACES=208, PETRI_TRANSITIONS=355} [2025-03-04 02:29:02,747 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 187 predicate places. [2025-03-04 02:29:02,747 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 355 transitions, 5143 flow [2025-03-04 02:29:02,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:02,747 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:29:02,747 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:29:02,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 02:29:02,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-04 02:29:02,948 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:29:02,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:29:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash 793336653, now seen corresponding path program 9 times [2025-03-04 02:29:02,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:29:02,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060602843] [2025-03-04 02:29:02,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:29:02,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:29:02,952 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:02,962 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:02,962 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:29:02,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:03,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:29:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060602843] [2025-03-04 02:29:03,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060602843] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:29:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977063903] [2025-03-04 02:29:03,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:29:03,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:03,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:29:03,093 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:29:03,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 02:29:03,131 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:03,146 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:03,146 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:29:03,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:03,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:29:03,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:29:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:03,191 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:29:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:03,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977063903] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:29:03,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:29:03,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-03-04 02:29:03,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041969398] [2025-03-04 02:29:03,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:29:03,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-04 02:29:03,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:29:03,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-04 02:29:03,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2025-03-04 02:29:03,306 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:29:03,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 355 transitions, 5143 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:03,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:29:03,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:29:03,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:29:04,680 INFO L124 PetriNetUnfolderBase]: 934/1825 cut-off events. [2025-03-04 02:29:04,681 INFO L125 PetriNetUnfolderBase]: For 15081/15081 co-relation queries the response was YES. [2025-03-04 02:29:04,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12527 conditions, 1825 events. 934/1825 cut-off events. For 15081/15081 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11081 event pairs, 76 based on Foata normal form. 25/1850 useless extension candidates. Maximal degree in co-relation 12226. Up to 434 conditions per place. [2025-03-04 02:29:04,694 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 231 selfloop transitions, 287 changer transitions 14/533 dead transitions. [2025-03-04 02:29:04,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 533 transitions, 8079 flow [2025-03-04 02:29:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-04 02:29:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-04 02:29:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 335 transitions. [2025-03-04 02:29:04,695 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2025-03-04 02:29:04,695 INFO L175 Difference]: Start difference. First operand has 208 places, 355 transitions, 5143 flow. Second operand 44 states and 335 transitions. [2025-03-04 02:29:04,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 533 transitions, 8079 flow [2025-03-04 02:29:04,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 533 transitions, 7212 flow, removed 374 selfloop flow, removed 6 redundant places. [2025-03-04 02:29:04,768 INFO L231 Difference]: Finished difference. Result has 255 places, 421 transitions, 6309 flow [2025-03-04 02:29:04,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4386, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6309, PETRI_PLACES=255, PETRI_TRANSITIONS=421} [2025-03-04 02:29:04,769 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2025-03-04 02:29:04,769 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 421 transitions, 6309 flow [2025-03-04 02:29:04,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:04,769 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:29:04,769 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:29:04,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-04 02:29:04,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-04 02:29:04,970 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:29:04,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:29:04,971 INFO L85 PathProgramCache]: Analyzing trace with hash -238622413, now seen corresponding path program 10 times [2025-03-04 02:29:04,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:29:04,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937373825] [2025-03-04 02:29:04,971 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:29:04,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:29:04,975 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:04,982 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:04,982 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:29:04,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:05,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:29:05,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937373825] [2025-03-04 02:29:05,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937373825] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:29:05,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360643134] [2025-03-04 02:29:05,108 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:29:05,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:05,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:29:05,110 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:29:05,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 02:29:05,151 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:05,165 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:05,166 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:29:05,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:05,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:29:05,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:29:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:05,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:29:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:05,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360643134] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:29:05,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:29:05,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-03-04 02:29:05,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978287268] [2025-03-04 02:29:05,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:29:05,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:29:05,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:29:05,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:29:05,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:29:05,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:29:05,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 421 transitions, 6309 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:05,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:29:05,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:29:05,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:29:06,517 INFO L124 PetriNetUnfolderBase]: 1017/2009 cut-off events. [2025-03-04 02:29:06,517 INFO L125 PetriNetUnfolderBase]: For 19052/19052 co-relation queries the response was YES. [2025-03-04 02:29:06,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14620 conditions, 2009 events. 1017/2009 cut-off events. For 19052/19052 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12548 event pairs, 142 based on Foata normal form. 20/2029 useless extension candidates. Maximal degree in co-relation 14412. Up to 752 conditions per place. [2025-03-04 02:29:06,531 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 267 selfloop transitions, 281 changer transitions 2/551 dead transitions. [2025-03-04 02:29:06,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 551 transitions, 8845 flow [2025-03-04 02:29:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-04 02:29:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-03-04 02:29:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 281 transitions. [2025-03-04 02:29:06,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4257575757575758 [2025-03-04 02:29:06,533 INFO L175 Difference]: Start difference. First operand has 255 places, 421 transitions, 6309 flow. Second operand 33 states and 281 transitions. [2025-03-04 02:29:06,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 551 transitions, 8845 flow [2025-03-04 02:29:06,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 551 transitions, 8283 flow, removed 182 selfloop flow, removed 16 redundant places. [2025-03-04 02:29:06,648 INFO L231 Difference]: Finished difference. Result has 271 places, 447 transitions, 7170 flow [2025-03-04 02:29:06,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7170, PETRI_PLACES=271, PETRI_TRANSITIONS=447} [2025-03-04 02:29:06,649 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 250 predicate places. [2025-03-04 02:29:06,649 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 447 transitions, 7170 flow [2025-03-04 02:29:06,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:06,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:29:06,649 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:29:06,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-04 02:29:06,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-04 02:29:06,850 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:29:06,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:29:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1213889315, now seen corresponding path program 11 times [2025-03-04 02:29:06,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:29:06,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787985382] [2025-03-04 02:29:06,851 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:29:06,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:29:06,854 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-03-04 02:29:06,862 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:06,862 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-04 02:29:06,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:07,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:29:07,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787985382] [2025-03-04 02:29:07,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787985382] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:29:07,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554109061] [2025-03-04 02:29:07,052 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:29:07,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:07,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:29:07,054 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:29:07,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 02:29:07,095 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-03-04 02:29:07,120 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:07,120 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-04 02:29:07,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:07,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:29:07,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:29:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:07,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:29:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:07,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554109061] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:29:07,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:29:07,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-03-04 02:29:07,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787478429] [2025-03-04 02:29:07,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:29:07,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 02:29:07,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:29:07,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 02:29:07,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-03-04 02:29:07,327 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:29:07,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 447 transitions, 7170 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:07,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:29:07,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:29:07,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:29:10,085 INFO L124 PetriNetUnfolderBase]: 1536/3052 cut-off events. [2025-03-04 02:29:10,085 INFO L125 PetriNetUnfolderBase]: For 34221/34221 co-relation queries the response was YES. [2025-03-04 02:29:10,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22904 conditions, 3052 events. 1536/3052 cut-off events. For 34221/34221 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21089 event pairs, 133 based on Foata normal form. 45/3097 useless extension candidates. Maximal degree in co-relation 22621. Up to 683 conditions per place. [2025-03-04 02:29:10,105 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 364 selfloop transitions, 417 changer transitions 27/809 dead transitions. [2025-03-04 02:29:10,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 809 transitions, 14288 flow [2025-03-04 02:29:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-04 02:29:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-04 02:29:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 231 transitions. [2025-03-04 02:29:10,106 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4442307692307692 [2025-03-04 02:29:10,106 INFO L175 Difference]: Start difference. First operand has 271 places, 447 transitions, 7170 flow. Second operand 26 states and 231 transitions. [2025-03-04 02:29:10,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 809 transitions, 14288 flow [2025-03-04 02:29:10,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 809 transitions, 13746 flow, removed 112 selfloop flow, removed 20 redundant places. [2025-03-04 02:29:10,306 INFO L231 Difference]: Finished difference. Result has 294 places, 676 transitions, 12382 flow [2025-03-04 02:29:10,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12382, PETRI_PLACES=294, PETRI_TRANSITIONS=676} [2025-03-04 02:29:10,307 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2025-03-04 02:29:10,307 INFO L471 AbstractCegarLoop]: Abstraction has has 294 places, 676 transitions, 12382 flow [2025-03-04 02:29:10,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:10,307 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:29:10,307 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:29:10,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-04 02:29:10,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:10,508 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:29:10,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:29:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2035153801, now seen corresponding path program 12 times [2025-03-04 02:29:10,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:29:10,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779107899] [2025-03-04 02:29:10,508 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:29:10,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:29:10,512 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:10,518 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:10,518 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:29:10,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:10,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:29:10,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779107899] [2025-03-04 02:29:10,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779107899] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:29:10,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138840430] [2025-03-04 02:29:10,674 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:29:10,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:10,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:29:10,676 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:29:10,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 02:29:10,718 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:10,733 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:10,733 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:29:10,733 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:10,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:29:10,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:29:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:10,796 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:29:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:10,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138840430] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:29:10,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:29:10,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2025-03-04 02:29:10,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28536140] [2025-03-04 02:29:10,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:29:10,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 02:29:10,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:29:10,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 02:29:10,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2025-03-04 02:29:10,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:29:10,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 676 transitions, 12382 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:10,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:29:10,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:29:10,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:29:15,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-04 02:29:20,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-04 02:29:20,824 INFO L124 PetriNetUnfolderBase]: 1962/3792 cut-off events. [2025-03-04 02:29:20,824 INFO L125 PetriNetUnfolderBase]: For 52262/52262 co-relation queries the response was YES. [2025-03-04 02:29:20,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32845 conditions, 3792 events. 1962/3792 cut-off events. For 52262/52262 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 26978 event pairs, 454 based on Foata normal form. 106/3898 useless extension candidates. Maximal degree in co-relation 32541. Up to 2367 conditions per place. [2025-03-04 02:29:20,855 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 582 selfloop transitions, 429 changer transitions 3/1015 dead transitions. [2025-03-04 02:29:20,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1015 transitions, 20673 flow [2025-03-04 02:29:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-04 02:29:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-03-04 02:29:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 311 transitions. [2025-03-04 02:29:20,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37023809523809526 [2025-03-04 02:29:20,856 INFO L175 Difference]: Start difference. First operand has 294 places, 676 transitions, 12382 flow. Second operand 42 states and 311 transitions. [2025-03-04 02:29:20,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1015 transitions, 20673 flow [2025-03-04 02:29:21,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1015 transitions, 20006 flow, removed 327 selfloop flow, removed 3 redundant places. [2025-03-04 02:29:21,409 INFO L231 Difference]: Finished difference. Result has 347 places, 904 transitions, 18361 flow [2025-03-04 02:29:21,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11760, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=18361, PETRI_PLACES=347, PETRI_TRANSITIONS=904} [2025-03-04 02:29:21,410 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 326 predicate places. [2025-03-04 02:29:21,410 INFO L471 AbstractCegarLoop]: Abstraction has has 347 places, 904 transitions, 18361 flow [2025-03-04 02:29:21,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:21,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:29:21,410 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:29:21,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-04 02:29:21,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:21,611 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:29:21,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:29:21,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1218087799, now seen corresponding path program 13 times [2025-03-04 02:29:21,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:29:21,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171155856] [2025-03-04 02:29:21,611 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:29:21,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:29:21,615 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 02:29:21,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:21,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:29:21,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:21,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:29:21,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171155856] [2025-03-04 02:29:21,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171155856] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:29:21,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723845293] [2025-03-04 02:29:21,742 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:29:21,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:21,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:29:21,744 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:29:21,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 02:29:21,785 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 02:29:21,800 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:21,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:29:21,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:21,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:29:21,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:29:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:21,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:29:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:21,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723845293] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:29:21,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:29:21,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-03-04 02:29:21,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027223696] [2025-03-04 02:29:21,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:29:21,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:29:21,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:29:21,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:29:21,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:29:21,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:29:21,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 904 transitions, 18361 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:21,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:29:21,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:29:21,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:29:24,376 INFO L124 PetriNetUnfolderBase]: 2340/4604 cut-off events. [2025-03-04 02:29:24,376 INFO L125 PetriNetUnfolderBase]: For 91053/91053 co-relation queries the response was YES. [2025-03-04 02:29:24,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43492 conditions, 4604 events. 2340/4604 cut-off events. For 91053/91053 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 34390 event pairs, 266 based on Foata normal form. 44/4648 useless extension candidates. Maximal degree in co-relation 42965. Up to 1349 conditions per place. [2025-03-04 02:29:24,418 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 506 selfloop transitions, 662 changer transitions 2/1171 dead transitions. [2025-03-04 02:29:24,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1171 transitions, 25853 flow [2025-03-04 02:29:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-04 02:29:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-04 02:29:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 241 transitions. [2025-03-04 02:29:24,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4303571428571429 [2025-03-04 02:29:24,419 INFO L175 Difference]: Start difference. First operand has 347 places, 904 transitions, 18361 flow. Second operand 28 states and 241 transitions. [2025-03-04 02:29:24,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1171 transitions, 25853 flow [2025-03-04 02:29:25,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1171 transitions, 24812 flow, removed 466 selfloop flow, removed 6 redundant places. [2025-03-04 02:29:25,419 INFO L231 Difference]: Finished difference. Result has 377 places, 1036 transitions, 22852 flow [2025-03-04 02:29:25,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=17434, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=558, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=22852, PETRI_PLACES=377, PETRI_TRANSITIONS=1036} [2025-03-04 02:29:25,420 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 356 predicate places. [2025-03-04 02:29:25,420 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 1036 transitions, 22852 flow [2025-03-04 02:29:25,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:25,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:29:25,420 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:29:25,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-04 02:29:25,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:25,621 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:29:25,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:29:25,621 INFO L85 PathProgramCache]: Analyzing trace with hash -269245623, now seen corresponding path program 14 times [2025-03-04 02:29:25,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:29:25,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450573767] [2025-03-04 02:29:25,621 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:29:25,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:29:25,626 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:25,631 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:25,631 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:29:25,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:25,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:29:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450573767] [2025-03-04 02:29:25,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450573767] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:29:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773742206] [2025-03-04 02:29:25,735 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:29:25,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:29:25,737 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:29:25,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 02:29:25,778 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:25,794 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:25,794 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:29:25,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:25,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:29:25,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:29:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:25,838 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:29:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:25,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773742206] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:29:25,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:29:25,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-03-04 02:29:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473084515] [2025-03-04 02:29:25,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:29:25,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-04 02:29:25,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:29:25,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-04 02:29:25,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2025-03-04 02:29:25,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:29:25,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1036 transitions, 22852 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:25,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:29:25,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:29:25,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:29:30,227 INFO L124 PetriNetUnfolderBase]: 2475/4950 cut-off events. [2025-03-04 02:29:30,227 INFO L125 PetriNetUnfolderBase]: For 113186/113186 co-relation queries the response was YES. [2025-03-04 02:29:30,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49410 conditions, 4950 events. 2475/4950 cut-off events. For 113186/113186 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38211 event pairs, 138 based on Foata normal form. 36/4986 useless extension candidates. Maximal degree in co-relation 48919. Up to 1408 conditions per place. [2025-03-04 02:29:30,274 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 455 selfloop transitions, 803 changer transitions 21/1280 dead transitions. [2025-03-04 02:29:30,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1280 transitions, 30099 flow [2025-03-04 02:29:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-04 02:29:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2025-03-04 02:29:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 368 transitions. [2025-03-04 02:29:30,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35384615384615387 [2025-03-04 02:29:30,276 INFO L175 Difference]: Start difference. First operand has 377 places, 1036 transitions, 22852 flow. Second operand 52 states and 368 transitions. [2025-03-04 02:29:30,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1280 transitions, 30099 flow [2025-03-04 02:29:31,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1280 transitions, 29173 flow, removed 390 selfloop flow, removed 12 redundant places. [2025-03-04 02:29:31,534 INFO L231 Difference]: Finished difference. Result has 426 places, 1138 transitions, 27274 flow [2025-03-04 02:29:31,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=21998, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=690, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=27274, PETRI_PLACES=426, PETRI_TRANSITIONS=1138} [2025-03-04 02:29:31,535 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 405 predicate places. [2025-03-04 02:29:31,535 INFO L471 AbstractCegarLoop]: Abstraction has has 426 places, 1138 transitions, 27274 flow [2025-03-04 02:29:31,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:31,535 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:29:31,535 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:29:31,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-04 02:29:31,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:31,736 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:29:31,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:29:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash 745762039, now seen corresponding path program 15 times [2025-03-04 02:29:31,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:29:31,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859778936] [2025-03-04 02:29:31,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:29:31,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:29:31,740 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:31,752 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:31,752 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:29:31,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:31,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:29:31,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859778936] [2025-03-04 02:29:31,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859778936] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:29:31,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173005489] [2025-03-04 02:29:31,925 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:29:31,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:31,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:29:31,927 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:29:31,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-04 02:29:31,966 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:31,981 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:31,981 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:29:31,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:31,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:29:31,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:29:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:32,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:29:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:32,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173005489] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:29:32,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:29:32,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2025-03-04 02:29:32,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806450363] [2025-03-04 02:29:32,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:29:32,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 02:29:32,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:29:32,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 02:29:32,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2025-03-04 02:29:32,126 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:29:32,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1138 transitions, 27274 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:32,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:29:32,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:29:32,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:29:35,764 INFO L124 PetriNetUnfolderBase]: 4521/9057 cut-off events. [2025-03-04 02:29:35,764 INFO L125 PetriNetUnfolderBase]: For 222550/222550 co-relation queries the response was YES. [2025-03-04 02:29:35,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96924 conditions, 9057 events. 4521/9057 cut-off events. For 222550/222550 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 76844 event pairs, 59 based on Foata normal form. 74/9131 useless extension candidates. Maximal degree in co-relation 96451. Up to 3223 conditions per place. [2025-03-04 02:29:35,947 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1520 selfloop transitions, 691 changer transitions 7/2219 dead transitions. [2025-03-04 02:29:35,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 2219 transitions, 59267 flow [2025-03-04 02:29:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-04 02:29:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-03-04 02:29:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 243 transitions. [2025-03-04 02:29:35,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3796875 [2025-03-04 02:29:35,948 INFO L175 Difference]: Start difference. First operand has 426 places, 1138 transitions, 27274 flow. Second operand 32 states and 243 transitions. [2025-03-04 02:29:35,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 2219 transitions, 59267 flow [2025-03-04 02:29:40,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 2219 transitions, 57379 flow, removed 754 selfloop flow, removed 21 redundant places. [2025-03-04 02:29:40,538 INFO L231 Difference]: Finished difference. Result has 454 places, 1689 transitions, 43591 flow [2025-03-04 02:29:40,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26249, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=43591, PETRI_PLACES=454, PETRI_TRANSITIONS=1689} [2025-03-04 02:29:40,539 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 433 predicate places. [2025-03-04 02:29:40,539 INFO L471 AbstractCegarLoop]: Abstraction has has 454 places, 1689 transitions, 43591 flow [2025-03-04 02:29:40,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:40,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:29:40,540 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:29:40,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-04 02:29:40,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:40,742 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:29:40,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:29:40,743 INFO L85 PathProgramCache]: Analyzing trace with hash -876254873, now seen corresponding path program 16 times [2025-03-04 02:29:40,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:29:40,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907938780] [2025-03-04 02:29:40,743 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:29:40,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:29:40,747 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:40,752 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:40,753 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:29:40,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:40,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:29:40,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907938780] [2025-03-04 02:29:40,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907938780] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:29:40,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348445309] [2025-03-04 02:29:40,876 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:29:40,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:29:40,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:29:40,879 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:29:40,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-04 02:29:40,922 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-04 02:29:40,936 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:29:40,936 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:29:40,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:29:40,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:29:40,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:29:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:40,990 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:29:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:29:41,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348445309] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:29:41,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:29:41,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-03-04 02:29:41,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096665137] [2025-03-04 02:29:41,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:29:41,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 02:29:41,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:29:41,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 02:29:41,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-03-04 02:29:41,088 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:29:41,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1689 transitions, 43591 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:29:41,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:29:41,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:29:41,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:29:57,796 INFO L124 PetriNetUnfolderBase]: 5066/10135 cut-off events. [2025-03-04 02:29:57,796 INFO L125 PetriNetUnfolderBase]: For 268179/268179 co-relation queries the response was YES. [2025-03-04 02:29:57,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114237 conditions, 10135 events. 5066/10135 cut-off events. For 268179/268179 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 87948 event pairs, 89 based on Foata normal form. 126/10261 useless extension candidates. Maximal degree in co-relation 113629. Up to 5584 conditions per place. [2025-03-04 02:29:57,937 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 1489 selfloop transitions, 771 changer transitions 12/2273 dead transitions. [2025-03-04 02:29:57,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 2273 transitions, 62375 flow [2025-03-04 02:29:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-03-04 02:29:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2025-03-04 02:29:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 458 transitions. [2025-03-04 02:29:57,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3634920634920635 [2025-03-04 02:29:57,939 INFO L175 Difference]: Start difference. First operand has 454 places, 1689 transitions, 43591 flow. Second operand 63 states and 458 transitions. [2025-03-04 02:29:57,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 2273 transitions, 62375 flow [2025-03-04 02:30:04,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 2273 transitions, 61090 flow, removed 550 selfloop flow, removed 5 redundant places. [2025-03-04 02:30:04,501 INFO L231 Difference]: Finished difference. Result has 538 places, 1982 transitions, 54203 flow [2025-03-04 02:30:04,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=42445, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1054, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=54203, PETRI_PLACES=538, PETRI_TRANSITIONS=1982} [2025-03-04 02:30:04,503 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 517 predicate places. [2025-03-04 02:30:04,504 INFO L471 AbstractCegarLoop]: Abstraction has has 538 places, 1982 transitions, 54203 flow [2025-03-04 02:30:04,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:30:04,504 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:30:04,504 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:30:04,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-04 02:30:04,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:30:04,708 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:30:04,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:30:04,709 INFO L85 PathProgramCache]: Analyzing trace with hash 769675571, now seen corresponding path program 17 times [2025-03-04 02:30:04,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:30:04,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568707945] [2025-03-04 02:30:04,709 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:30:04,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:30:04,713 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-03-04 02:30:04,719 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:30:04,722 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-04 02:30:04,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:30:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:30:04,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:30:04,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568707945] [2025-03-04 02:30:04,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568707945] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:30:04,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305122831] [2025-03-04 02:30:04,823 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:30:04,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:30:04,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:30:04,825 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:30:04,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-04 02:30:04,879 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-03-04 02:30:04,894 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 02:30:04,895 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-04 02:30:04,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:30:04,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 02:30:04,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:30:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:30:04,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:30:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:30:05,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305122831] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:30:05,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:30:05,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-03-04 02:30:05,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241254903] [2025-03-04 02:30:05,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:30:05,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-04 02:30:05,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:30:05,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-04 02:30:05,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2025-03-04 02:30:05,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-04 02:30:05,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1982 transitions, 54203 flow. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:30:05,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:30:05,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-04 02:30:05,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand