./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.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/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:25:43,578 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:25:43,640 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:25:43,645 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:25:43,646 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:25:43,672 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:25:43,673 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:25:43,673 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:25:43,674 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:25:43,675 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:25:43,675 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:25:43,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:25:43,679 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:25:43,679 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:25:43,680 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:25:43,680 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:25:43,680 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:25:43,681 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:25:43,681 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:25:43,681 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:25:43,682 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:25:43,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:25:43,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:25:43,686 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:25:43,686 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:25:43,687 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:25:43,687 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:25:43,687 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:25:43,688 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:25:43,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:25:43,688 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:25:43,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:25:43,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:25:43,689 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:25:43,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:25:43,693 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:25:43,694 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:25:43,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:25:43,694 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:25:43,694 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:25:43,695 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:25:43,696 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:25:43,696 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-11-10 10:25:43,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:25:43,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:25:43,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:25:43,993 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:25:43,993 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:25:43,994 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-10 10:25:45,450 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:25:45,643 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:25:45,645 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-10 10:25:45,653 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3460848/c79f6762a8d7442983b9736c979e0803/FLAG13eacc92b [2024-11-10 10:25:46,039 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3460848/c79f6762a8d7442983b9736c979e0803 [2024-11-10 10:25:46,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:25:46,045 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:25:46,047 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:25:46,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:25:46,053 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:25:46,054 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,055 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5144e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46, skipping insertion in model container [2024-11-10 10:25:46,055 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,083 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:25:46,288 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/array-eq-symm.wvr.c[2277,2290] [2024-11-10 10:25:46,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:25:46,313 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:25:46,336 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/array-eq-symm.wvr.c[2277,2290] [2024-11-10 10:25:46,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:25:46,365 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:25:46,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46 WrapperNode [2024-11-10 10:25:46,366 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:25:46,367 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:25:46,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:25:46,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:25:46,375 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,382 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,406 INFO L138 Inliner]: procedures = 22, calls = 19, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 103 [2024-11-10 10:25:46,406 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:25:46,407 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:25:46,407 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:25:46,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:25:46,417 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,420 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,435 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 10:25:46,436 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,436 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,448 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,452 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,453 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,457 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,463 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:25:46,464 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:25:46,464 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:25:46,464 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:25:46,465 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (1/1) ... [2024-11-10 10:25:46,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:25:46,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:25:46,504 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) [2024-11-10 10:25:46,510 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 [2024-11-10 10:25:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:25:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:25:46,579 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:25:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:25:46,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:25:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:25:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:25:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:25:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:25:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 10:25:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:25:46,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:25:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:25:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:25:46,584 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:25:46,737 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:25:46,739 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:25:47,012 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:25:47,013 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:25:47,197 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:25:47,197 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:25:47,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:25:47 BoogieIcfgContainer [2024-11-10 10:25:47,201 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:25:47,203 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:25:47,204 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:25:47,207 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:25:47,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:25:46" (1/3) ... [2024-11-10 10:25:47,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9346bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:25:47, skipping insertion in model container [2024-11-10 10:25:47,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:46" (2/3) ... [2024-11-10 10:25:47,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9346bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:25:47, skipping insertion in model container [2024-11-10 10:25:47,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:25:47" (3/3) ... [2024-11-10 10:25:47,210 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-11-10 10:25:47,228 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:25:47,228 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:25:47,229 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:25:47,279 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:25:47,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 38 transitions, 90 flow [2024-11-10 10:25:47,341 INFO L124 PetriNetUnfolderBase]: 10/36 cut-off events. [2024-11-10 10:25:47,341 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:25:47,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 36 events. 10/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 23. Up to 3 conditions per place. [2024-11-10 10:25:47,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 38 transitions, 90 flow [2024-11-10 10:25:47,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 35 transitions, 82 flow [2024-11-10 10:25:47,360 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:25:47,367 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;@5623593c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:25:47,367 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:25:47,376 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:25:47,377 INFO L124 PetriNetUnfolderBase]: 10/34 cut-off events. [2024-11-10 10:25:47,377 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:25:47,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:47,378 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:47,379 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:47,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2142271968, now seen corresponding path program 1 times [2024-11-10 10:25:47,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:47,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149374006] [2024-11-10 10:25:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:47,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:25:47,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:47,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149374006] [2024-11-10 10:25:47,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149374006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:47,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:47,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:25:47,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489937558] [2024-11-10 10:25:47,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:47,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:25:47,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:25:47,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:25:47,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:47,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 35 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 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) [2024-11-10 10:25:47,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:47,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:47,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:47,719 INFO L124 PetriNetUnfolderBase]: 114/207 cut-off events. [2024-11-10 10:25:47,719 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-10 10:25:47,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 207 events. 114/207 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 746 event pairs, 52 based on Foata normal form. 42/212 useless extension candidates. Maximal degree in co-relation 336. Up to 163 conditions per place. [2024-11-10 10:25:47,725 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 20 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2024-11-10 10:25:47,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 114 flow [2024-11-10 10:25:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:25:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:25:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2024-11-10 10:25:47,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-10 10:25:47,777 INFO L175 Difference]: Start difference. First operand has 32 places, 35 transitions, 82 flow. Second operand 2 states and 50 transitions. [2024-11-10 10:25:47,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 114 flow [2024-11-10 10:25:47,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 106 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:25:47,792 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 66 flow [2024-11-10 10:25:47,795 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2024-11-10 10:25:47,809 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2024-11-10 10:25:47,810 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 66 flow [2024-11-10 10:25:47,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 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) [2024-11-10 10:25:47,810 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:47,810 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:47,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:25:47,811 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:47,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:47,817 INFO L85 PathProgramCache]: Analyzing trace with hash -825474492, now seen corresponding path program 1 times [2024-11-10 10:25:47,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:47,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721539021] [2024-11-10 10:25:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:47,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:25:48,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:48,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721539021] [2024-11-10 10:25:48,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721539021] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:48,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:48,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:25:48,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625599640] [2024-11-10 10:25:48,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:48,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:25:48,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:48,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:25:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:25:48,166 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:48,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:25:48,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:48,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:48,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:48,314 INFO L124 PetriNetUnfolderBase]: 171/315 cut-off events. [2024-11-10 10:25:48,314 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:25:48,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 315 events. 171/315 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1319 event pairs, 35 based on Foata normal form. 1/261 useless extension candidates. Maximal degree in co-relation 581. Up to 159 conditions per place. [2024-11-10 10:25:48,318 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 29 selfloop transitions, 3 changer transitions 1/44 dead transitions. [2024-11-10 10:25:48,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 44 transitions, 161 flow [2024-11-10 10:25:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:25:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:25:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-10 10:25:48,324 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6403508771929824 [2024-11-10 10:25:48,324 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 66 flow. Second operand 3 states and 73 transitions. [2024-11-10 10:25:48,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 44 transitions, 161 flow [2024-11-10 10:25:48,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 44 transitions, 161 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:25:48,329 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 85 flow [2024-11-10 10:25:48,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2024-11-10 10:25:48,332 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-11-10 10:25:48,332 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 85 flow [2024-11-10 10:25:48,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:25:48,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:48,333 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:48,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:25:48,333 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:48,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash 566073896, now seen corresponding path program 1 times [2024-11-10 10:25:48,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:48,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879187779] [2024-11-10 10:25:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:48,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:25:48,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:48,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879187779] [2024-11-10 10:25:48,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879187779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:48,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:48,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:25:48,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661551112] [2024-11-10 10:25:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:48,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:25:48,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:48,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:25:48,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:25:48,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:25:48,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-10 10:25:48,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:48,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:25:48,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:48,743 INFO L124 PetriNetUnfolderBase]: 218/429 cut-off events. [2024-11-10 10:25:48,744 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-10 10:25:48,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 429 events. 218/429 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2014 event pairs, 110 based on Foata normal form. 14/408 useless extension candidates. Maximal degree in co-relation 870. Up to 263 conditions per place. [2024-11-10 10:25:48,749 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 41 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-11-10 10:25:48,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 55 transitions, 232 flow [2024-11-10 10:25:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:25:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:25:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-11-10 10:25:48,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5210526315789473 [2024-11-10 10:25:48,754 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 85 flow. Second operand 5 states and 99 transitions. [2024-11-10 10:25:48,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 55 transitions, 232 flow [2024-11-10 10:25:48,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 55 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:25:48,758 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 118 flow [2024-11-10 10:25:48,758 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-11-10 10:25:48,760 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2024-11-10 10:25:48,760 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 118 flow [2024-11-10 10:25:48,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-10 10:25:48,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:48,761 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:48,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:25:48,761 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:48,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:48,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1833666256, now seen corresponding path program 1 times [2024-11-10 10:25:48,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:48,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573345767] [2024-11-10 10:25:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:25:48,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:48,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573345767] [2024-11-10 10:25:48,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573345767] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:48,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:48,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:25:48,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807920547] [2024-11-10 10:25:48,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:48,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:25:48,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:48,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:25:48,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:25:48,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:25:48,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-10 10:25:48,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:48,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:25:48,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:49,045 INFO L124 PetriNetUnfolderBase]: 181/357 cut-off events. [2024-11-10 10:25:49,045 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-10 10:25:49,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 357 events. 181/357 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1546 event pairs, 88 based on Foata normal form. 3/332 useless extension candidates. Maximal degree in co-relation 743. Up to 263 conditions per place. [2024-11-10 10:25:49,051 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 23 selfloop transitions, 2 changer transitions 16/50 dead transitions. [2024-11-10 10:25:49,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 234 flow [2024-11-10 10:25:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:25:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:25:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-11-10 10:25:49,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-10 10:25:49,053 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 118 flow. Second operand 5 states and 95 transitions. [2024-11-10 10:25:49,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 234 flow [2024-11-10 10:25:49,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:25:49,055 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 104 flow [2024-11-10 10:25:49,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2024-11-10 10:25:49,058 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 10 predicate places. [2024-11-10 10:25:49,058 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 104 flow [2024-11-10 10:25:49,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-10 10:25:49,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:49,059 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:49,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:25:49,060 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:49,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1381709910, now seen corresponding path program 1 times [2024-11-10 10:25:49,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:49,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191520939] [2024-11-10 10:25:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:49,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:25:49,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:49,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191520939] [2024-11-10 10:25:49,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191520939] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:49,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:49,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:25:49,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310343092] [2024-11-10 10:25:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:49,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:25:49,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:25:49,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:25:49,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:25:49,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-10 10:25:49,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:49,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:25:49,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:49,341 INFO L124 PetriNetUnfolderBase]: 259/502 cut-off events. [2024-11-10 10:25:49,341 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-11-10 10:25:49,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 502 events. 259/502 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2433 event pairs, 105 based on Foata normal form. 14/488 useless extension candidates. Maximal degree in co-relation 1080. Up to 190 conditions per place. [2024-11-10 10:25:49,344 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 48 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-11-10 10:25:49,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 303 flow [2024-11-10 10:25:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:25:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:25:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-11-10 10:25:49,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5175438596491229 [2024-11-10 10:25:49,346 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 104 flow. Second operand 6 states and 118 transitions. [2024-11-10 10:25:49,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 303 flow [2024-11-10 10:25:49,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 64 transitions, 281 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-10 10:25:49,350 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 137 flow [2024-11-10 10:25:49,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=137, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-11-10 10:25:49,350 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 10 predicate places. [2024-11-10 10:25:49,351 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 137 flow [2024-11-10 10:25:49,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-10 10:25:49,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:49,351 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:49,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 10:25:49,352 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:49,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash 513517234, now seen corresponding path program 1 times [2024-11-10 10:25:49,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:49,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166157040] [2024-11-10 10:25:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:25:49,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:49,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166157040] [2024-11-10 10:25:49,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166157040] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:49,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:49,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:25:49,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909773230] [2024-11-10 10:25:49,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:49,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:25:49,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:25:49,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:25:49,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:25:49,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-10 10:25:49,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:49,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:25:49,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:49,595 INFO L124 PetriNetUnfolderBase]: 259/498 cut-off events. [2024-11-10 10:25:49,599 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-11-10 10:25:49,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 498 events. 259/498 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2275 event pairs, 86 based on Foata normal form. 3/473 useless extension candidates. Maximal degree in co-relation 1093. Up to 209 conditions per place. [2024-11-10 10:25:49,603 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 34 selfloop transitions, 5 changer transitions 10/58 dead transitions. [2024-11-10 10:25:49,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 291 flow [2024-11-10 10:25:49,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:25:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:25:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-11-10 10:25:49,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2024-11-10 10:25:49,606 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 137 flow. Second operand 6 states and 112 transitions. [2024-11-10 10:25:49,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 291 flow [2024-11-10 10:25:49,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:25:49,609 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 145 flow [2024-11-10 10:25:49,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2024-11-10 10:25:49,610 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2024-11-10 10:25:49,612 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 145 flow [2024-11-10 10:25:49,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-10 10:25:49,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:49,629 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:49,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 10:25:49,630 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:49,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:49,630 INFO L85 PathProgramCache]: Analyzing trace with hash 525026345, now seen corresponding path program 1 times [2024-11-10 10:25:49,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:49,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142477024] [2024-11-10 10:25:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:49,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:25:49,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:49,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142477024] [2024-11-10 10:25:49,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142477024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:25:49,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600424459] [2024-11-10 10:25:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:49,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:25:49,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:25:49,833 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) [2024-11-10 10:25:49,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:25:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:49,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 10:25:49,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:25:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:25:50,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:25:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:25:50,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600424459] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 10:25:50,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 10:25:50,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2024-11-10 10:25:50,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781399216] [2024-11-10 10:25:50,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:50,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 10:25:50,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 10:25:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-11-10 10:25:50,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-10 10:25:50,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 145 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2024-11-10 10:25:50,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:50,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-10 10:25:50,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:50,472 INFO L124 PetriNetUnfolderBase]: 312/565 cut-off events. [2024-11-10 10:25:50,473 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2024-11-10 10:25:50,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1376 conditions, 565 events. 312/565 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2540 event pairs, 88 based on Foata normal form. 11/564 useless extension candidates. Maximal degree in co-relation 1364. Up to 202 conditions per place. [2024-11-10 10:25:50,477 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 42 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-11-10 10:25:50,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 313 flow [2024-11-10 10:25:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:25:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:25:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-11-10 10:25:50,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4398496240601504 [2024-11-10 10:25:50,480 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 145 flow. Second operand 7 states and 117 transitions. [2024-11-10 10:25:50,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 313 flow [2024-11-10 10:25:50,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 296 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-10 10:25:50,484 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 164 flow [2024-11-10 10:25:50,484 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=164, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-11-10 10:25:50,485 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2024-11-10 10:25:50,485 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 164 flow [2024-11-10 10:25:50,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2024-11-10 10:25:50,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:50,487 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:50,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:25:50,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:25:50,689 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:50,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1818231383, now seen corresponding path program 1 times [2024-11-10 10:25:50,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:50,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667994846] [2024-11-10 10:25:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:50,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:25:50,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:50,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667994846] [2024-11-10 10:25:50,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667994846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:25:50,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500494326] [2024-11-10 10:25:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:50,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:25:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:25:50,937 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) [2024-11-10 10:25:50,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:25:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:51,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 10:25:51,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:25:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:25:51,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:25:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:25:51,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500494326] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 10:25:51,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 10:25:51,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-11-10 10:25:51,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188520667] [2024-11-10 10:25:51,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:51,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 10:25:51,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:51,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 10:25:51,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:25:51,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-10 10:25:51,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2024-11-10 10:25:51,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:51,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-10 10:25:51,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:51,459 INFO L124 PetriNetUnfolderBase]: 320/627 cut-off events. [2024-11-10 10:25:51,459 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2024-11-10 10:25:51,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571 conditions, 627 events. 320/627 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2999 event pairs, 122 based on Foata normal form. 0/600 useless extension candidates. Maximal degree in co-relation 1561. Up to 204 conditions per place. [2024-11-10 10:25:51,464 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 49 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-11-10 10:25:51,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 374 flow [2024-11-10 10:25:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:25:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:25:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-11-10 10:25:51,465 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4548872180451128 [2024-11-10 10:25:51,465 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 164 flow. Second operand 7 states and 121 transitions. [2024-11-10 10:25:51,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 374 flow [2024-11-10 10:25:51,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 352 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-10 10:25:51,468 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 178 flow [2024-11-10 10:25:51,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2024-11-10 10:25:51,469 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2024-11-10 10:25:51,469 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 178 flow [2024-11-10 10:25:51,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2024-11-10 10:25:51,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:51,470 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:51,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:25:51,670 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,SelfDestructingSolverStorable7 [2024-11-10 10:25:51,671 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:51,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1311227750, now seen corresponding path program 1 times [2024-11-10 10:25:51,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:51,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631830024] [2024-11-10 10:25:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:52,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:52,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631830024] [2024-11-10 10:25:52,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631830024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:52,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:52,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:25:52,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293020956] [2024-11-10 10:25:52,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:52,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:25:52,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:25:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:25:52,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:52,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 178 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:25:52,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:52,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:52,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:52,400 INFO L124 PetriNetUnfolderBase]: 302/615 cut-off events. [2024-11-10 10:25:52,400 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2024-11-10 10:25:52,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 615 events. 302/615 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2953 event pairs, 80 based on Foata normal form. 4/611 useless extension candidates. Maximal degree in co-relation 1601. Up to 431 conditions per place. [2024-11-10 10:25:52,405 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 38 selfloop transitions, 11 changer transitions 5/65 dead transitions. [2024-11-10 10:25:52,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 368 flow [2024-11-10 10:25:52,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:25:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:25:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-11-10 10:25:52,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2024-11-10 10:25:52,407 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 178 flow. Second operand 7 states and 140 transitions. [2024-11-10 10:25:52,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 368 flow [2024-11-10 10:25:52,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 65 transitions, 348 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-10 10:25:52,412 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 240 flow [2024-11-10 10:25:52,412 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-11-10 10:25:52,412 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2024-11-10 10:25:52,413 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 240 flow [2024-11-10 10:25:52,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:25:52,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:52,413 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:52,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 10:25:52,413 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:52,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:52,414 INFO L85 PathProgramCache]: Analyzing trace with hash -607683716, now seen corresponding path program 2 times [2024-11-10 10:25:52,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:52,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218591405] [2024-11-10 10:25:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:52,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:52,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218591405] [2024-11-10 10:25:52,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218591405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:52,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:52,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:25:52,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231531477] [2024-11-10 10:25:52,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:52,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:25:52,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:25:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:25:52,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:52,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 240 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:25:52,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:52,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:52,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:53,031 INFO L124 PetriNetUnfolderBase]: 300/601 cut-off events. [2024-11-10 10:25:53,031 INFO L125 PetriNetUnfolderBase]: For 581/589 co-relation queries the response was YES. [2024-11-10 10:25:53,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1750 conditions, 601 events. 300/601 cut-off events. For 581/589 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2767 event pairs, 89 based on Foata normal form. 5/601 useless extension candidates. Maximal degree in co-relation 1736. Up to 431 conditions per place. [2024-11-10 10:25:53,035 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 39 selfloop transitions, 12 changer transitions 8/70 dead transitions. [2024-11-10 10:25:53,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 459 flow [2024-11-10 10:25:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:25:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:25:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-11-10 10:25:53,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2024-11-10 10:25:53,037 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 240 flow. Second operand 7 states and 140 transitions. [2024-11-10 10:25:53,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 459 flow [2024-11-10 10:25:53,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 441 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-10 10:25:53,040 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 304 flow [2024-11-10 10:25:53,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=304, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2024-11-10 10:25:53,041 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 30 predicate places. [2024-11-10 10:25:53,041 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 304 flow [2024-11-10 10:25:53,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:25:53,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:53,042 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:53,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 10:25:53,042 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:53,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1232996680, now seen corresponding path program 3 times [2024-11-10 10:25:53,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:53,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411919427] [2024-11-10 10:25:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:53,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:53,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:53,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411919427] [2024-11-10 10:25:53,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411919427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:25:53,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780226350] [2024-11-10 10:25:53,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:25:53,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:25:53,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:25:53,396 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) [2024-11-10 10:25:53,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:25:53,480 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 10:25:53,481 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:25:53,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 10:25:53,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:25:53,735 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-10 10:25:53,736 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-10 10:25:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:53,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:25:53,864 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:25:53,865 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:25:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:53,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780226350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:25:53,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:25:53,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-11-10 10:25:53,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29618393] [2024-11-10 10:25:53,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:25:53,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:25:53,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:53,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:25:53,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:25:53,966 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:53,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 304 flow. Second operand has 13 states, 13 states have (on average 15.923076923076923) internal successors, (207), 13 states have internal predecessors, (207), 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) [2024-11-10 10:25:53,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:53,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:53,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:54,244 INFO L124 PetriNetUnfolderBase]: 309/634 cut-off events. [2024-11-10 10:25:54,245 INFO L125 PetriNetUnfolderBase]: For 751/751 co-relation queries the response was YES. [2024-11-10 10:25:54,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1974 conditions, 634 events. 309/634 cut-off events. For 751/751 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3065 event pairs, 26 based on Foata normal form. 12/642 useless extension candidates. Maximal degree in co-relation 1955. Up to 303 conditions per place. [2024-11-10 10:25:54,250 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 49 selfloop transitions, 16 changer transitions 3/79 dead transitions. [2024-11-10 10:25:54,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 543 flow [2024-11-10 10:25:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 10:25:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 10:25:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-11-10 10:25:54,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5427631578947368 [2024-11-10 10:25:54,251 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 304 flow. Second operand 8 states and 165 transitions. [2024-11-10 10:25:54,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 543 flow [2024-11-10 10:25:54,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 525 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-10 10:25:54,258 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 332 flow [2024-11-10 10:25:54,258 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=332, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2024-11-10 10:25:54,258 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 34 predicate places. [2024-11-10 10:25:54,259 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 332 flow [2024-11-10 10:25:54,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.923076923076923) internal successors, (207), 13 states have internal predecessors, (207), 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) [2024-11-10 10:25:54,259 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:54,260 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:54,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:25:54,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:25:54,461 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:54,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:54,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1808087864, now seen corresponding path program 4 times [2024-11-10 10:25:54,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:54,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709734106] [2024-11-10 10:25:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:54,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:54,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:54,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709734106] [2024-11-10 10:25:54,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709734106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:54,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:54,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:25:54,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638512312] [2024-11-10 10:25:54,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:54,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:25:54,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:54,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:25:54,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:25:54,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:54,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:25:54,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:54,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:54,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:55,082 INFO L124 PetriNetUnfolderBase]: 305/618 cut-off events. [2024-11-10 10:25:55,082 INFO L125 PetriNetUnfolderBase]: For 1016/1028 co-relation queries the response was YES. [2024-11-10 10:25:55,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 618 events. 305/618 cut-off events. For 1016/1028 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2916 event pairs, 101 based on Foata normal form. 7/618 useless extension candidates. Maximal degree in co-relation 1952. Up to 456 conditions per place. [2024-11-10 10:25:55,086 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 37 selfloop transitions, 12 changer transitions 7/67 dead transitions. [2024-11-10 10:25:55,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 494 flow [2024-11-10 10:25:55,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:25:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:25:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-11-10 10:25:55,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5225563909774437 [2024-11-10 10:25:55,088 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 332 flow. Second operand 7 states and 139 transitions. [2024-11-10 10:25:55,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 494 flow [2024-11-10 10:25:55,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 441 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-10 10:25:55,092 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 318 flow [2024-11-10 10:25:55,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2024-11-10 10:25:55,094 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2024-11-10 10:25:55,094 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 318 flow [2024-11-10 10:25:55,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:25:55,094 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:55,094 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:55,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 10:25:55,095 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:55,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1527560670, now seen corresponding path program 5 times [2024-11-10 10:25:55,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:55,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931122014] [2024-11-10 10:25:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:55,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:55,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:55,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931122014] [2024-11-10 10:25:55,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931122014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:25:55,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658843206] [2024-11-10 10:25:55,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:25:55,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:25:55,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:25:55,441 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) [2024-11-10 10:25:55,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:25:55,522 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:25:55,522 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:25:55,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 10:25:55,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:25:55,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:25:55,674 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-11-10 10:25:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:55,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:25:55,818 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:25:55,819 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:25:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:55,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658843206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:25:55,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:25:55,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 14 [2024-11-10 10:25:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602300071] [2024-11-10 10:25:55,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:25:55,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:25:55,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:55,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:25:55,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:25:55,912 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:55,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 318 flow. Second operand has 15 states, 15 states have (on average 15.8) internal successors, (237), 15 states have internal predecessors, (237), 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) [2024-11-10 10:25:55,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:55,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:55,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:56,243 INFO L124 PetriNetUnfolderBase]: 350/715 cut-off events. [2024-11-10 10:25:56,243 INFO L125 PetriNetUnfolderBase]: For 806/806 co-relation queries the response was YES. [2024-11-10 10:25:56,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2199 conditions, 715 events. 350/715 cut-off events. For 806/806 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3595 event pairs, 73 based on Foata normal form. 17/723 useless extension candidates. Maximal degree in co-relation 2178. Up to 487 conditions per place. [2024-11-10 10:25:56,249 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 55 selfloop transitions, 23 changer transitions 0/89 dead transitions. [2024-11-10 10:25:56,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 89 transitions, 608 flow [2024-11-10 10:25:56,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 10:25:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 10:25:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-11-10 10:25:56,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5119617224880383 [2024-11-10 10:25:56,251 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 318 flow. Second operand 11 states and 214 transitions. [2024-11-10 10:25:56,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 89 transitions, 608 flow [2024-11-10 10:25:56,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 89 transitions, 574 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-10 10:25:56,256 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 413 flow [2024-11-10 10:25:56,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=413, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-11-10 10:25:56,258 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2024-11-10 10:25:56,258 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 413 flow [2024-11-10 10:25:56,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.8) internal successors, (237), 15 states have internal predecessors, (237), 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) [2024-11-10 10:25:56,258 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:56,258 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:56,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 10:25:56,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:25:56,463 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:56,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:56,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1823969272, now seen corresponding path program 6 times [2024-11-10 10:25:56,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:56,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648938227] [2024-11-10 10:25:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:56,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:56,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:56,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648938227] [2024-11-10 10:25:56,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648938227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:25:56,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002136875] [2024-11-10 10:25:56,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:25:56,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:25:56,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:25:56,879 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) [2024-11-10 10:25:56,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:25:56,961 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-10 10:25:56,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:25:56,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 10:25:56,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:25:57,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:25:57,131 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-10 10:25:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:57,160 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:25:57,272 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:25:57,272 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:25:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:57,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002136875] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 10:25:57,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 10:25:57,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2024-11-10 10:25:57,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747956478] [2024-11-10 10:25:57,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:57,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 10:25:57,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 10:25:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-10 10:25:57,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:57,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 413 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:25:57,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:57,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:57,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:57,505 INFO L124 PetriNetUnfolderBase]: 302/624 cut-off events. [2024-11-10 10:25:57,505 INFO L125 PetriNetUnfolderBase]: For 1197/1212 co-relation queries the response was YES. [2024-11-10 10:25:57,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 624 events. 302/624 cut-off events. For 1197/1212 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2978 event pairs, 62 based on Foata normal form. 22/642 useless extension candidates. Maximal degree in co-relation 2102. Up to 453 conditions per place. [2024-11-10 10:25:57,510 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 52 selfloop transitions, 13 changer transitions 0/76 dead transitions. [2024-11-10 10:25:57,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 597 flow [2024-11-10 10:25:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:25:57,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:25:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-11-10 10:25:57,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2024-11-10 10:25:57,511 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 413 flow. Second operand 6 states and 126 transitions. [2024-11-10 10:25:57,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 597 flow [2024-11-10 10:25:57,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 568 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-10 10:25:57,516 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 415 flow [2024-11-10 10:25:57,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=415, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-11-10 10:25:57,517 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2024-11-10 10:25:57,517 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 415 flow [2024-11-10 10:25:57,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:25:57,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:57,517 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:57,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 10:25:57,721 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,SelfDestructingSolverStorable13 [2024-11-10 10:25:57,722 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:57,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1079379296, now seen corresponding path program 1 times [2024-11-10 10:25:57,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:57,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630711105] [2024-11-10 10:25:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:57,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:58,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:58,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630711105] [2024-11-10 10:25:58,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630711105] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:58,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:58,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:25:58,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006135995] [2024-11-10 10:25:58,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:58,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:25:58,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:58,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:25:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:25:58,077 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:58,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 415 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:25:58,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:58,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:58,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:58,256 INFO L124 PetriNetUnfolderBase]: 302/623 cut-off events. [2024-11-10 10:25:58,257 INFO L125 PetriNetUnfolderBase]: For 1103/1103 co-relation queries the response was YES. [2024-11-10 10:25:58,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2182 conditions, 623 events. 302/623 cut-off events. For 1103/1103 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3009 event pairs, 62 based on Foata normal form. 5/623 useless extension candidates. Maximal degree in co-relation 2158. Up to 479 conditions per place. [2024-11-10 10:25:58,262 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 45 selfloop transitions, 13 changer transitions 7/76 dead transitions. [2024-11-10 10:25:58,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 602 flow [2024-11-10 10:25:58,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:25:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:25:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-10 10:25:58,263 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075187969924813 [2024-11-10 10:25:58,263 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 415 flow. Second operand 7 states and 135 transitions. [2024-11-10 10:25:58,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 602 flow [2024-11-10 10:25:58,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 575 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:25:58,267 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 427 flow [2024-11-10 10:25:58,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2024-11-10 10:25:58,268 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 44 predicate places. [2024-11-10 10:25:58,268 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 427 flow [2024-11-10 10:25:58,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:25:58,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:58,268 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:58,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 10:25:58,268 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:58,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:58,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1901243216, now seen corresponding path program 2 times [2024-11-10 10:25:58,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:58,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201901218] [2024-11-10 10:25:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:58,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:58,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:58,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201901218] [2024-11-10 10:25:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201901218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:25:58,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:25:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:25:58,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962835214] [2024-11-10 10:25:58,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:58,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:25:58,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:58,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:25:58,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:25:58,630 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:58,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 427 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:25:58,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:58,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:58,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:58,802 INFO L124 PetriNetUnfolderBase]: 291/597 cut-off events. [2024-11-10 10:25:58,803 INFO L125 PetriNetUnfolderBase]: For 1090/1090 co-relation queries the response was YES. [2024-11-10 10:25:58,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2100 conditions, 597 events. 291/597 cut-off events. For 1090/1090 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2855 event pairs, 76 based on Foata normal form. 5/597 useless extension candidates. Maximal degree in co-relation 2075. Up to 479 conditions per place. [2024-11-10 10:25:58,808 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 44 selfloop transitions, 13 changer transitions 4/72 dead transitions. [2024-11-10 10:25:58,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 577 flow [2024-11-10 10:25:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:25:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:25:58,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-11-10 10:25:58,810 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5037593984962406 [2024-11-10 10:25:58,810 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 427 flow. Second operand 7 states and 134 transitions. [2024-11-10 10:25:58,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 577 flow [2024-11-10 10:25:58,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 542 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-10 10:25:58,815 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 413 flow [2024-11-10 10:25:58,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=413, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2024-11-10 10:25:58,815 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2024-11-10 10:25:58,816 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 413 flow [2024-11-10 10:25:58,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:25:58,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:58,816 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:58,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 10:25:58,817 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:58,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash 112026252, now seen corresponding path program 3 times [2024-11-10 10:25:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:58,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650327383] [2024-11-10 10:25:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:25:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:59,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:25:59,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650327383] [2024-11-10 10:25:59,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650327383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:25:59,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348331484] [2024-11-10 10:25:59,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:25:59,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:25:59,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:25:59,084 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) [2024-11-10 10:25:59,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 10:25:59,182 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 10:25:59,182 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:25:59,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 10:25:59,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:25:59,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:25:59,340 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-10 10:25:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:59,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:25:59,458 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:25:59,458 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:25:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:25:59,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348331484] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 10:25:59,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 10:25:59,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2024-11-10 10:25:59,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157136816] [2024-11-10 10:25:59,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:25:59,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 10:25:59,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:25:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 10:25:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-10 10:25:59,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:25:59,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 413 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:25:59,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:25:59,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:25:59,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:25:59,675 INFO L124 PetriNetUnfolderBase]: 304/615 cut-off events. [2024-11-10 10:25:59,676 INFO L125 PetriNetUnfolderBase]: For 1104/1104 co-relation queries the response was YES. [2024-11-10 10:25:59,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2165 conditions, 615 events. 304/615 cut-off events. For 1104/1104 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2932 event pairs, 82 based on Foata normal form. 10/622 useless extension candidates. Maximal degree in co-relation 2142. Up to 487 conditions per place. [2024-11-10 10:25:59,680 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 51 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-11-10 10:25:59,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 594 flow [2024-11-10 10:25:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:25:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:25:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-11-10 10:25:59,681 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5394736842105263 [2024-11-10 10:25:59,681 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 413 flow. Second operand 6 states and 123 transitions. [2024-11-10 10:25:59,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 594 flow [2024-11-10 10:25:59,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 568 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 10:25:59,686 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 425 flow [2024-11-10 10:25:59,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=425, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2024-11-10 10:25:59,686 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2024-11-10 10:25:59,686 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 425 flow [2024-11-10 10:25:59,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:25:59,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:25:59,687 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:25:59,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 10:25:59,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-10 10:25:59,891 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:25:59,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:25:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1167790242, now seen corresponding path program 4 times [2024-11-10 10:25:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:25:59,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443300007] [2024-11-10 10:25:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:25:59,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:25:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:00,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:00,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443300007] [2024-11-10 10:26:00,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443300007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:00,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105067175] [2024-11-10 10:26:00,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:26:00,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:00,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:00,160 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) [2024-11-10 10:26:00,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 10:26:00,241 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:26:00,241 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:00,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 10:26:00,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:00,432 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-10 10:26:00,432 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-10 10:26:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:00,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:00,537 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:26:00,537 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:26:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:00,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105067175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:00,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:00,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 14 [2024-11-10 10:26:00,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921167378] [2024-11-10 10:26:00,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:00,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:26:00,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:26:00,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:26:00,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:00,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 425 flow. Second operand has 15 states, 15 states have (on average 15.866666666666667) internal successors, (238), 15 states have internal predecessors, (238), 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) [2024-11-10 10:26:00,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:00,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:00,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:00,878 INFO L124 PetriNetUnfolderBase]: 319/656 cut-off events. [2024-11-10 10:26:00,878 INFO L125 PetriNetUnfolderBase]: For 1354/1363 co-relation queries the response was YES. [2024-11-10 10:26:00,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2352 conditions, 656 events. 319/656 cut-off events. For 1354/1363 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3207 event pairs, 56 based on Foata normal form. 16/668 useless extension candidates. Maximal degree in co-relation 2328. Up to 384 conditions per place. [2024-11-10 10:26:00,882 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 55 selfloop transitions, 16 changer transitions 0/82 dead transitions. [2024-11-10 10:26:00,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 659 flow [2024-11-10 10:26:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 10:26:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 10:26:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-11-10 10:26:00,884 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5164473684210527 [2024-11-10 10:26:00,884 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 425 flow. Second operand 8 states and 157 transitions. [2024-11-10 10:26:00,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 659 flow [2024-11-10 10:26:00,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 82 transitions, 637 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:26:00,888 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 449 flow [2024-11-10 10:26:00,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=449, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-11-10 10:26:00,889 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2024-11-10 10:26:00,889 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 449 flow [2024-11-10 10:26:00,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.866666666666667) internal successors, (238), 15 states have internal predecessors, (238), 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) [2024-11-10 10:26:00,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:00,890 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:00,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 10:26:01,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:01,094 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:01,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash -407894208, now seen corresponding path program 5 times [2024-11-10 10:26:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:01,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916238571] [2024-11-10 10:26:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:01,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:01,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916238571] [2024-11-10 10:26:01,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916238571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:26:01,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:26:01,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:26:01,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664332574] [2024-11-10 10:26:01,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:26:01,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:26:01,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:26:01,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:26:01,381 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:01,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 449 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:26:01,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:01,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:01,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:01,599 INFO L124 PetriNetUnfolderBase]: 314/641 cut-off events. [2024-11-10 10:26:01,600 INFO L125 PetriNetUnfolderBase]: For 1662/1671 co-relation queries the response was YES. [2024-11-10 10:26:01,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2353 conditions, 641 events. 314/641 cut-off events. For 1662/1671 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3118 event pairs, 84 based on Foata normal form. 11/646 useless extension candidates. Maximal degree in co-relation 2328. Up to 524 conditions per place. [2024-11-10 10:26:01,605 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 42 selfloop transitions, 11 changer transitions 4/68 dead transitions. [2024-11-10 10:26:01,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 68 transitions, 567 flow [2024-11-10 10:26:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:26:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:26:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-11-10 10:26:01,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4849624060150376 [2024-11-10 10:26:01,606 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 449 flow. Second operand 7 states and 129 transitions. [2024-11-10 10:26:01,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 68 transitions, 567 flow [2024-11-10 10:26:01,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 68 transitions, 514 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-10 10:26:01,611 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 396 flow [2024-11-10 10:26:01,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=396, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2024-11-10 10:26:01,611 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 45 predicate places. [2024-11-10 10:26:01,612 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 396 flow [2024-11-10 10:26:01,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 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) [2024-11-10 10:26:01,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:01,612 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:01,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-10 10:26:01,612 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:01,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:01,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1740964996, now seen corresponding path program 6 times [2024-11-10 10:26:01,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:01,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615452790] [2024-11-10 10:26:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:01,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:01,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615452790] [2024-11-10 10:26:01,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615452790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:01,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356118327] [2024-11-10 10:26:01,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:26:01,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:01,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:01,863 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) [2024-11-10 10:26:01,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 10:26:01,943 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-10 10:26:01,943 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:01,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 10:26:01,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:02,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:26:02,094 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-10 10:26:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:02,122 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:02,221 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:26:02,221 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:26:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:02,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356118327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:02,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:02,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 13 [2024-11-10 10:26:02,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875181810] [2024-11-10 10:26:02,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:02,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 10:26:02,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 10:26:02,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-10 10:26:02,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:02,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 396 flow. Second operand has 14 states, 14 states have (on average 15.5) internal successors, (217), 14 states have internal predecessors, (217), 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) [2024-11-10 10:26:02,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:02,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:02,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:02,669 INFO L124 PetriNetUnfolderBase]: 301/624 cut-off events. [2024-11-10 10:26:02,669 INFO L125 PetriNetUnfolderBase]: For 1229/1238 co-relation queries the response was YES. [2024-11-10 10:26:02,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 624 events. 301/624 cut-off events. For 1229/1238 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3062 event pairs, 56 based on Foata normal form. 20/640 useless extension candidates. Maximal degree in co-relation 2179. Up to 457 conditions per place. [2024-11-10 10:26:02,675 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 51 selfloop transitions, 20 changer transitions 0/82 dead transitions. [2024-11-10 10:26:02,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 82 transitions, 630 flow [2024-11-10 10:26:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 10:26:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 10:26:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-11-10 10:26:02,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-11-10 10:26:02,677 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 396 flow. Second operand 11 states and 198 transitions. [2024-11-10 10:26:02,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 82 transitions, 630 flow [2024-11-10 10:26:02,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 608 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 10:26:02,683 INFO L231 Difference]: Finished difference. Result has 84 places, 67 transitions, 488 flow [2024-11-10 10:26:02,683 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=488, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2024-11-10 10:26:02,685 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2024-11-10 10:26:02,685 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 488 flow [2024-11-10 10:26:02,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.5) internal successors, (217), 14 states have internal predecessors, (217), 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) [2024-11-10 10:26:02,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:02,686 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:02,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 10:26:02,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:02,890 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:02,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:02,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1790854361, now seen corresponding path program 1 times [2024-11-10 10:26:02,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:02,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890982187] [2024-11-10 10:26:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:02,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:02,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:02,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890982187] [2024-11-10 10:26:02,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890982187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:02,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386774267] [2024-11-10 10:26:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:02,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:02,988 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) [2024-11-10 10:26:02,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 10:26:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:03,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 10:26:03,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:03,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:03,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386774267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:03,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:03,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-11-10 10:26:03,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129604778] [2024-11-10 10:26:03,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:03,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 10:26:03,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:03,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 10:26:03,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-10 10:26:03,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:03,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 488 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 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) [2024-11-10 10:26:03,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:03,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:03,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:03,472 INFO L124 PetriNetUnfolderBase]: 602/1229 cut-off events. [2024-11-10 10:26:03,472 INFO L125 PetriNetUnfolderBase]: For 2973/2982 co-relation queries the response was YES. [2024-11-10 10:26:03,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4323 conditions, 1229 events. 602/1229 cut-off events. For 2973/2982 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7046 event pairs, 52 based on Foata normal form. 14/1238 useless extension candidates. Maximal degree in co-relation 4295. Up to 480 conditions per place. [2024-11-10 10:26:03,481 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 82 selfloop transitions, 20 changer transitions 2/115 dead transitions. [2024-11-10 10:26:03,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 953 flow [2024-11-10 10:26:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:26:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:26:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-11-10 10:26:03,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6165413533834586 [2024-11-10 10:26:03,482 INFO L175 Difference]: Start difference. First operand has 84 places, 67 transitions, 488 flow. Second operand 7 states and 164 transitions. [2024-11-10 10:26:03,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 953 flow [2024-11-10 10:26:03,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 115 transitions, 926 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-10 10:26:03,492 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 609 flow [2024-11-10 10:26:03,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=609, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2024-11-10 10:26:03,492 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 56 predicate places. [2024-11-10 10:26:03,492 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 609 flow [2024-11-10 10:26:03,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 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) [2024-11-10 10:26:03,493 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:03,493 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:03,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 10:26:03,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:03,694 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:03,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:03,694 INFO L85 PathProgramCache]: Analyzing trace with hash 86216069, now seen corresponding path program 2 times [2024-11-10 10:26:03,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:03,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987567402] [2024-11-10 10:26:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:03,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:03,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987567402] [2024-11-10 10:26:03,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987567402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717168994] [2024-11-10 10:26:03,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:26:03,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:03,764 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) [2024-11-10 10:26:03,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 10:26:03,850 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:26:03,850 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:03,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 10:26:03,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:26:03,936 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:03,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717168994] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:03,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:03,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-11-10 10:26:03,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441435084] [2024-11-10 10:26:03,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:03,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 10:26:03,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:03,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 10:26:03,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-10 10:26:03,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:03,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 609 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 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) [2024-11-10 10:26:03,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:03,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:03,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:04,287 INFO L124 PetriNetUnfolderBase]: 893/1806 cut-off events. [2024-11-10 10:26:04,287 INFO L125 PetriNetUnfolderBase]: For 5000/5009 co-relation queries the response was YES. [2024-11-10 10:26:04,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6554 conditions, 1806 events. 893/1806 cut-off events. For 5000/5009 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11404 event pairs, 216 based on Foata normal form. 14/1812 useless extension candidates. Maximal degree in co-relation 6522. Up to 1025 conditions per place. [2024-11-10 10:26:04,301 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 89 selfloop transitions, 20 changer transitions 2/122 dead transitions. [2024-11-10 10:26:04,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 122 transitions, 1098 flow [2024-11-10 10:26:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:26:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:26:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-11-10 10:26:04,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-11-10 10:26:04,302 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 609 flow. Second operand 7 states and 161 transitions. [2024-11-10 10:26:04,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 122 transitions, 1098 flow [2024-11-10 10:26:04,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 122 transitions, 1069 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-10 10:26:04,316 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 742 flow [2024-11-10 10:26:04,317 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=742, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2024-11-10 10:26:04,317 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 64 predicate places. [2024-11-10 10:26:04,317 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 742 flow [2024-11-10 10:26:04,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 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) [2024-11-10 10:26:04,317 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:04,318 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:04,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 10:26:04,521 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,SelfDestructingSolverStorable21 [2024-11-10 10:26:04,522 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:04,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:04,523 INFO L85 PathProgramCache]: Analyzing trace with hash -390910023, now seen corresponding path program 3 times [2024-11-10 10:26:04,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:04,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778295934] [2024-11-10 10:26:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:04,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 10:26:04,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:04,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778295934] [2024-11-10 10:26:04,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778295934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:04,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662266406] [2024-11-10 10:26:04,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:26:04,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:04,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:04,625 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) [2024-11-10 10:26:04,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 10:26:04,706 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 10:26:04,706 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:04,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-10 10:26:04,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:26:04,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:26:05,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662266406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:05,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:05,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 22 [2024-11-10 10:26:05,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317389517] [2024-11-10 10:26:05,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:05,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 10:26:05,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:05,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 10:26:05,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-11-10 10:26:05,240 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:26:05,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 742 flow. Second operand has 23 states, 23 states have (on average 12.08695652173913) internal successors, (278), 23 states have internal predecessors, (278), 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) [2024-11-10 10:26:05,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:05,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:26:05,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:06,426 INFO L124 PetriNetUnfolderBase]: 1974/3795 cut-off events. [2024-11-10 10:26:06,426 INFO L125 PetriNetUnfolderBase]: For 11919/11955 co-relation queries the response was YES. [2024-11-10 10:26:06,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14373 conditions, 3795 events. 1974/3795 cut-off events. For 11919/11955 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25672 event pairs, 288 based on Foata normal form. 131/3910 useless extension candidates. Maximal degree in co-relation 14337. Up to 888 conditions per place. [2024-11-10 10:26:06,451 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 177 selfloop transitions, 102 changer transitions 37/323 dead transitions. [2024-11-10 10:26:06,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 323 transitions, 3011 flow [2024-11-10 10:26:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-10 10:26:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-10 10:26:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 563 transitions. [2024-11-10 10:26:06,454 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41154970760233917 [2024-11-10 10:26:06,454 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 742 flow. Second operand 36 states and 563 transitions. [2024-11-10 10:26:06,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 323 transitions, 3011 flow [2024-11-10 10:26:06,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 323 transitions, 2910 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-11-10 10:26:06,499 INFO L231 Difference]: Finished difference. Result has 146 places, 152 transitions, 1752 flow [2024-11-10 10:26:06,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1752, PETRI_PLACES=146, PETRI_TRANSITIONS=152} [2024-11-10 10:26:06,501 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 114 predicate places. [2024-11-10 10:26:06,501 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 152 transitions, 1752 flow [2024-11-10 10:26:06,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.08695652173913) internal successors, (278), 23 states have internal predecessors, (278), 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) [2024-11-10 10:26:06,502 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:06,502 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:06,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 10:26:06,705 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,SelfDestructingSolverStorable22 [2024-11-10 10:26:06,706 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:06,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:06,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1891189429, now seen corresponding path program 4 times [2024-11-10 10:26:06,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:06,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156457152] [2024-11-10 10:26:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:06,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:26:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:06,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156457152] [2024-11-10 10:26:06,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156457152] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:06,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690740764] [2024-11-10 10:26:06,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:26:06,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:06,788 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) [2024-11-10 10:26:06,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 10:26:06,860 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:26:06,860 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:06,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 10:26:06,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:07,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:07,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690740764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:07,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:07,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 16 [2024-11-10 10:26:07,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779647530] [2024-11-10 10:26:07,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:07,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 10:26:07,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:07,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 10:26:07,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-10 10:26:07,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:26:07,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 152 transitions, 1752 flow. Second operand has 16 states, 16 states have (on average 12.3125) internal successors, (197), 16 states have internal predecessors, (197), 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) [2024-11-10 10:26:07,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:07,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:26:07,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:08,002 INFO L124 PetriNetUnfolderBase]: 1648/3211 cut-off events. [2024-11-10 10:26:08,003 INFO L125 PetriNetUnfolderBase]: For 16698/16698 co-relation queries the response was YES. [2024-11-10 10:26:08,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13885 conditions, 3211 events. 1648/3211 cut-off events. For 16698/16698 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 21409 event pairs, 230 based on Foata normal form. 20/3221 useless extension candidates. Maximal degree in co-relation 13833. Up to 692 conditions per place. [2024-11-10 10:26:08,025 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 68 selfloop transitions, 134 changer transitions 49/258 dead transitions. [2024-11-10 10:26:08,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 258 transitions, 2976 flow [2024-11-10 10:26:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-10 10:26:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-10 10:26:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 293 transitions. [2024-11-10 10:26:08,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40581717451523547 [2024-11-10 10:26:08,027 INFO L175 Difference]: Start difference. First operand has 146 places, 152 transitions, 1752 flow. Second operand 19 states and 293 transitions. [2024-11-10 10:26:08,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 258 transitions, 2976 flow [2024-11-10 10:26:08,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 258 transitions, 2742 flow, removed 74 selfloop flow, removed 12 redundant places. [2024-11-10 10:26:08,070 INFO L231 Difference]: Finished difference. Result has 150 places, 170 transitions, 2019 flow [2024-11-10 10:26:08,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2019, PETRI_PLACES=150, PETRI_TRANSITIONS=170} [2024-11-10 10:26:08,071 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 118 predicate places. [2024-11-10 10:26:08,071 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 170 transitions, 2019 flow [2024-11-10 10:26:08,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.3125) internal successors, (197), 16 states have internal predecessors, (197), 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) [2024-11-10 10:26:08,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:08,072 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:08,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-10 10:26:08,272 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,SelfDestructingSolverStorable23 [2024-11-10 10:26:08,272 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:08,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:08,273 INFO L85 PathProgramCache]: Analyzing trace with hash -524418461, now seen corresponding path program 5 times [2024-11-10 10:26:08,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:08,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185025002] [2024-11-10 10:26:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:08,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:26:08,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185025002] [2024-11-10 10:26:08,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185025002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:08,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689619771] [2024-11-10 10:26:08,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:26:08,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:08,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:08,371 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) [2024-11-10 10:26:08,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 10:26:08,462 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-10 10:26:08,462 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:08,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:26:08,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:26:08,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:26:08,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689619771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:08,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:08,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-10 10:26:08,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749609968] [2024-11-10 10:26:08,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:08,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:26:08,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:26:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:26:08,702 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:26:08,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 170 transitions, 2019 flow. Second operand has 15 states, 15 states have (on average 14.2) internal successors, (213), 15 states have internal predecessors, (213), 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) [2024-11-10 10:26:08,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:08,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:26:08,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:09,142 INFO L124 PetriNetUnfolderBase]: 1582/3261 cut-off events. [2024-11-10 10:26:09,142 INFO L125 PetriNetUnfolderBase]: For 18798/18852 co-relation queries the response was YES. [2024-11-10 10:26:09,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14678 conditions, 3261 events. 1582/3261 cut-off events. For 18798/18852 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23431 event pairs, 512 based on Foata normal form. 70/3286 useless extension candidates. Maximal degree in co-relation 14628. Up to 1940 conditions per place. [2024-11-10 10:26:09,168 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 189 selfloop transitions, 40 changer transitions 0/241 dead transitions. [2024-11-10 10:26:09,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 241 transitions, 3208 flow [2024-11-10 10:26:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:26:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:26:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-11-10 10:26:09,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2024-11-10 10:26:09,170 INFO L175 Difference]: Start difference. First operand has 150 places, 170 transitions, 2019 flow. Second operand 9 states and 156 transitions. [2024-11-10 10:26:09,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 241 transitions, 3208 flow [2024-11-10 10:26:09,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 241 transitions, 2840 flow, removed 47 selfloop flow, removed 15 redundant places. [2024-11-10 10:26:09,233 INFO L231 Difference]: Finished difference. Result has 127 places, 184 transitions, 2043 flow [2024-11-10 10:26:09,234 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2043, PETRI_PLACES=127, PETRI_TRANSITIONS=184} [2024-11-10 10:26:09,234 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 95 predicate places. [2024-11-10 10:26:09,234 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 184 transitions, 2043 flow [2024-11-10 10:26:09,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.2) internal successors, (213), 15 states have internal predecessors, (213), 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) [2024-11-10 10:26:09,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:09,235 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:09,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-10 10:26:09,435 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,SelfDestructingSolverStorable24 [2024-11-10 10:26:09,435 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:09,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:09,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1098169205, now seen corresponding path program 6 times [2024-11-10 10:26:09,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:09,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286800493] [2024-11-10 10:26:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:09,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:09,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:09,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286800493] [2024-11-10 10:26:09,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286800493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:09,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226305546] [2024-11-10 10:26:09,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:26:09,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:09,537 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) [2024-11-10 10:26:09,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 10:26:09,624 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-10 10:26:09,624 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:09,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:26:09,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:09,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:09,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226305546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:09,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:09,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-10 10:26:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962084676] [2024-11-10 10:26:09,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:09,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:26:09,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:26:09,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:26:09,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:26:09,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 184 transitions, 2043 flow. Second operand has 15 states, 15 states have (on average 14.333333333333334) internal successors, (215), 15 states have internal predecessors, (215), 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) [2024-11-10 10:26:09,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:09,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:26:09,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:10,132 INFO L124 PetriNetUnfolderBase]: 1283/2620 cut-off events. [2024-11-10 10:26:10,133 INFO L125 PetriNetUnfolderBase]: For 12524/12572 co-relation queries the response was YES. [2024-11-10 10:26:10,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10956 conditions, 2620 events. 1283/2620 cut-off events. For 12524/12572 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17592 event pairs, 387 based on Foata normal form. 34/2612 useless extension candidates. Maximal degree in co-relation 10916. Up to 1893 conditions per place. [2024-11-10 10:26:10,150 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 123 selfloop transitions, 25 changer transitions 34/194 dead transitions. [2024-11-10 10:26:10,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 194 transitions, 2327 flow [2024-11-10 10:26:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:26:10,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:26:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-11-10 10:26:10,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4415204678362573 [2024-11-10 10:26:10,152 INFO L175 Difference]: Start difference. First operand has 127 places, 184 transitions, 2043 flow. Second operand 9 states and 151 transitions. [2024-11-10 10:26:10,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 194 transitions, 2327 flow [2024-11-10 10:26:10,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 194 transitions, 2319 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:26:10,196 INFO L231 Difference]: Finished difference. Result has 132 places, 156 transitions, 1662 flow [2024-11-10 10:26:10,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1662, PETRI_PLACES=132, PETRI_TRANSITIONS=156} [2024-11-10 10:26:10,197 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 100 predicate places. [2024-11-10 10:26:10,197 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 156 transitions, 1662 flow [2024-11-10 10:26:10,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.333333333333334) internal successors, (215), 15 states have internal predecessors, (215), 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) [2024-11-10 10:26:10,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:10,198 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:10,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-10 10:26:10,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:10,399 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:10,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash -167576970, now seen corresponding path program 7 times [2024-11-10 10:26:10,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:10,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970248419] [2024-11-10 10:26:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 10:26:10,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970248419] [2024-11-10 10:26:10,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970248419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:10,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208235167] [2024-11-10 10:26:10,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:26:10,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:10,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:10,578 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) [2024-11-10 10:26:10,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-10 10:26:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:10,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-10 10:26:10,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 10:26:10,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 10:26:11,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208235167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:11,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:11,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-10 10:26:11,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109323068] [2024-11-10 10:26:11,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:11,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 10:26:11,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 10:26:11,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2024-11-10 10:26:11,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-10 10:26:11,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 156 transitions, 1662 flow. Second operand has 23 states, 23 states have (on average 12.521739130434783) internal successors, (288), 23 states have internal predecessors, (288), 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) [2024-11-10 10:26:11,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:11,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-10 10:26:11,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:11,636 INFO L124 PetriNetUnfolderBase]: 1416/2766 cut-off events. [2024-11-10 10:26:11,637 INFO L125 PetriNetUnfolderBase]: For 14889/14905 co-relation queries the response was YES. [2024-11-10 10:26:11,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11885 conditions, 2766 events. 1416/2766 cut-off events. For 14889/14905 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17890 event pairs, 260 based on Foata normal form. 52/2803 useless extension candidates. Maximal degree in co-relation 11844. Up to 796 conditions per place. [2024-11-10 10:26:11,656 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 113 selfloop transitions, 72 changer transitions 0/196 dead transitions. [2024-11-10 10:26:11,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 196 transitions, 2369 flow [2024-11-10 10:26:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 10:26:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 10:26:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 187 transitions. [2024-11-10 10:26:11,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3785425101214575 [2024-11-10 10:26:11,660 INFO L175 Difference]: Start difference. First operand has 132 places, 156 transitions, 1662 flow. Second operand 13 states and 187 transitions. [2024-11-10 10:26:11,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 196 transitions, 2369 flow [2024-11-10 10:26:11,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 196 transitions, 2278 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-11-10 10:26:11,713 INFO L231 Difference]: Finished difference. Result has 130 places, 166 transitions, 1916 flow [2024-11-10 10:26:11,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1916, PETRI_PLACES=130, PETRI_TRANSITIONS=166} [2024-11-10 10:26:11,714 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 98 predicate places. [2024-11-10 10:26:11,714 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 166 transitions, 1916 flow [2024-11-10 10:26:11,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.521739130434783) internal successors, (288), 23 states have internal predecessors, (288), 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) [2024-11-10 10:26:11,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:11,715 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:11,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-10 10:26:11,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-10 10:26:11,915 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:11,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash -355093314, now seen corresponding path program 8 times [2024-11-10 10:26:11,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:11,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114641309] [2024-11-10 10:26:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:11,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 10:26:12,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:12,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114641309] [2024-11-10 10:26:12,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114641309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:12,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588855236] [2024-11-10 10:26:12,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:26:12,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:12,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:12,064 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) [2024-11-10 10:26:12,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-10 10:26:12,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:26:12,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:12,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-10 10:26:12,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 10:26:12,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 10:26:12,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588855236] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:12,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:12,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-10 10:26:12,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147313256] [2024-11-10 10:26:12,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:12,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 10:26:12,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:12,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 10:26:12,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-11-10 10:26:12,597 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-10 10:26:12,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 166 transitions, 1916 flow. Second operand has 22 states, 22 states have (on average 12.545454545454545) internal successors, (276), 22 states have internal predecessors, (276), 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) [2024-11-10 10:26:12,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:12,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-10 10:26:12,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:13,060 INFO L124 PetriNetUnfolderBase]: 1583/3098 cut-off events. [2024-11-10 10:26:13,060 INFO L125 PetriNetUnfolderBase]: For 17323/17357 co-relation queries the response was YES. [2024-11-10 10:26:13,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13728 conditions, 3098 events. 1583/3098 cut-off events. For 17323/17357 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 20184 event pairs, 460 based on Foata normal form. 76/3167 useless extension candidates. Maximal degree in co-relation 13689. Up to 965 conditions per place. [2024-11-10 10:26:13,081 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 141 selfloop transitions, 63 changer transitions 0/212 dead transitions. [2024-11-10 10:26:13,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 212 transitions, 2668 flow [2024-11-10 10:26:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 10:26:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 10:26:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 192 transitions. [2024-11-10 10:26:13,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38866396761133604 [2024-11-10 10:26:13,082 INFO L175 Difference]: Start difference. First operand has 130 places, 166 transitions, 1916 flow. Second operand 13 states and 192 transitions. [2024-11-10 10:26:13,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 212 transitions, 2668 flow [2024-11-10 10:26:13,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 212 transitions, 2618 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-11-10 10:26:13,140 INFO L231 Difference]: Finished difference. Result has 135 places, 172 transitions, 2104 flow [2024-11-10 10:26:13,140 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2104, PETRI_PLACES=135, PETRI_TRANSITIONS=172} [2024-11-10 10:26:13,141 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2024-11-10 10:26:13,141 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 172 transitions, 2104 flow [2024-11-10 10:26:13,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.545454545454545) internal successors, (276), 22 states have internal predecessors, (276), 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) [2024-11-10 10:26:13,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:13,141 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:13,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-10 10:26:13,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-10 10:26:13,342 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:13,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1159852243, now seen corresponding path program 1 times [2024-11-10 10:26:13,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:13,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597700562] [2024-11-10 10:26:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:13,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:13,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:13,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597700562] [2024-11-10 10:26:13,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597700562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:13,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028367179] [2024-11-10 10:26:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:13,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:13,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:13,949 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) [2024-11-10 10:26:13,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-10 10:26:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:14,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 10:26:14,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:14,159 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-10 10:26:14,159 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-11-10 10:26:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:14,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:14,268 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-11-10 10:26:14,268 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-11-10 10:26:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:14,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028367179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:14,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:14,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 21 [2024-11-10 10:26:14,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438983702] [2024-11-10 10:26:14,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:14,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 10:26:14,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:14,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 10:26:14,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-11-10 10:26:14,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:14,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 172 transitions, 2104 flow. Second operand has 22 states, 22 states have (on average 15.5) internal successors, (341), 22 states have internal predecessors, (341), 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) [2024-11-10 10:26:14,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:14,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:14,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:15,297 INFO L124 PetriNetUnfolderBase]: 1789/3560 cut-off events. [2024-11-10 10:26:15,297 INFO L125 PetriNetUnfolderBase]: For 22645/22696 co-relation queries the response was YES. [2024-11-10 10:26:15,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16410 conditions, 3560 events. 1789/3560 cut-off events. For 22645/22696 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24542 event pairs, 321 based on Foata normal form. 54/3576 useless extension candidates. Maximal degree in co-relation 16369. Up to 1735 conditions per place. [2024-11-10 10:26:15,324 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 204 selfloop transitions, 80 changer transitions 1/299 dead transitions. [2024-11-10 10:26:15,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 299 transitions, 3820 flow [2024-11-10 10:26:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-10 10:26:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-10 10:26:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 374 transitions. [2024-11-10 10:26:15,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.518005540166205 [2024-11-10 10:26:15,326 INFO L175 Difference]: Start difference. First operand has 135 places, 172 transitions, 2104 flow. Second operand 19 states and 374 transitions. [2024-11-10 10:26:15,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 299 transitions, 3820 flow [2024-11-10 10:26:15,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 299 transitions, 3782 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-11-10 10:26:15,385 INFO L231 Difference]: Finished difference. Result has 151 places, 200 transitions, 2704 flow [2024-11-10 10:26:15,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2704, PETRI_PLACES=151, PETRI_TRANSITIONS=200} [2024-11-10 10:26:15,386 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 119 predicate places. [2024-11-10 10:26:15,386 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 200 transitions, 2704 flow [2024-11-10 10:26:15,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 15.5) internal successors, (341), 22 states have internal predecessors, (341), 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) [2024-11-10 10:26:15,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:15,386 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:15,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-10 10:26:15,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-10 10:26:15,587 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:15,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:15,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1576007521, now seen corresponding path program 2 times [2024-11-10 10:26:15,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:15,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718062386] [2024-11-10 10:26:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:15,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:16,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:16,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718062386] [2024-11-10 10:26:16,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718062386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:16,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077373695] [2024-11-10 10:26:16,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:26:16,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:16,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:16,089 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) [2024-11-10 10:26:16,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-10 10:26:16,199 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:26:16,199 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:16,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:26:16,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:16,444 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-10 10:26:16,445 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-10 10:26:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:26:16,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:16,573 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-11-10 10:26:16,574 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-11-10 10:26:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:16,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077373695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:16,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:16,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 19 [2024-11-10 10:26:16,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278233809] [2024-11-10 10:26:16,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:16,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:26:16,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:16,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:26:16,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:26:16,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:16,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 200 transitions, 2704 flow. Second operand has 20 states, 20 states have (on average 15.3) internal successors, (306), 20 states have internal predecessors, (306), 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) [2024-11-10 10:26:16,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:16,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:16,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:18,136 INFO L124 PetriNetUnfolderBase]: 2282/4541 cut-off events. [2024-11-10 10:26:18,136 INFO L125 PetriNetUnfolderBase]: For 44184/44243 co-relation queries the response was YES. [2024-11-10 10:26:18,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23249 conditions, 4541 events. 2282/4541 cut-off events. For 44184/44243 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 32854 event pairs, 305 based on Foata normal form. 101/4605 useless extension candidates. Maximal degree in co-relation 23200. Up to 2095 conditions per place. [2024-11-10 10:26:18,167 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 265 selfloop transitions, 184 changer transitions 1/464 dead transitions. [2024-11-10 10:26:18,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 464 transitions, 6314 flow [2024-11-10 10:26:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-10 10:26:18,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-10 10:26:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 729 transitions. [2024-11-10 10:26:18,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5184921763869133 [2024-11-10 10:26:18,169 INFO L175 Difference]: Start difference. First operand has 151 places, 200 transitions, 2704 flow. Second operand 37 states and 729 transitions. [2024-11-10 10:26:18,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 464 transitions, 6314 flow [2024-11-10 10:26:18,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 464 transitions, 6055 flow, removed 62 selfloop flow, removed 10 redundant places. [2024-11-10 10:26:18,273 INFO L231 Difference]: Finished difference. Result has 196 places, 314 transitions, 4888 flow [2024-11-10 10:26:18,273 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2566, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4888, PETRI_PLACES=196, PETRI_TRANSITIONS=314} [2024-11-10 10:26:18,274 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 164 predicate places. [2024-11-10 10:26:18,274 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 314 transitions, 4888 flow [2024-11-10 10:26:18,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.3) internal successors, (306), 20 states have internal predecessors, (306), 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) [2024-11-10 10:26:18,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:18,274 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:18,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-10 10:26:18,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:18,475 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:18,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1332263953, now seen corresponding path program 3 times [2024-11-10 10:26:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:18,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615872127] [2024-11-10 10:26:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:18,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:18,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615872127] [2024-11-10 10:26:18,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615872127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:18,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671626139] [2024-11-10 10:26:18,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:26:18,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:18,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:18,927 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) [2024-11-10 10:26:18,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-10 10:26:19,028 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 10:26:19,029 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:19,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:26:19,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:19,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:26:19,257 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-10 10:26:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:26:19,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:19,385 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-11-10 10:26:19,386 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-11-10 10:26:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:19,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671626139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:19,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:19,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 18 [2024-11-10 10:26:19,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168901424] [2024-11-10 10:26:19,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:19,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:26:19,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:26:19,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:26:19,607 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:19,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 314 transitions, 4888 flow. Second operand has 19 states, 19 states have (on average 15.368421052631579) internal successors, (292), 19 states have internal predecessors, (292), 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) [2024-11-10 10:26:19,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:19,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:19,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:21,043 INFO L124 PetriNetUnfolderBase]: 2350/4675 cut-off events. [2024-11-10 10:26:21,043 INFO L125 PetriNetUnfolderBase]: For 77824/77885 co-relation queries the response was YES. [2024-11-10 10:26:21,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27904 conditions, 4675 events. 2350/4675 cut-off events. For 77824/77885 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 33957 event pairs, 457 based on Foata normal form. 32/4675 useless extension candidates. Maximal degree in co-relation 27835. Up to 2690 conditions per place. [2024-11-10 10:26:21,073 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 244 selfloop transitions, 155 changer transitions 9/422 dead transitions. [2024-11-10 10:26:21,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 422 transitions, 6654 flow [2024-11-10 10:26:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-10 10:26:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-10 10:26:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 541 transitions. [2024-11-10 10:26:21,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4909255898366606 [2024-11-10 10:26:21,075 INFO L175 Difference]: Start difference. First operand has 196 places, 314 transitions, 4888 flow. Second operand 29 states and 541 transitions. [2024-11-10 10:26:21,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 422 transitions, 6654 flow [2024-11-10 10:26:21,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 422 transitions, 6157 flow, removed 154 selfloop flow, removed 14 redundant places. [2024-11-10 10:26:21,380 INFO L231 Difference]: Finished difference. Result has 216 places, 335 transitions, 5202 flow [2024-11-10 10:26:21,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4459, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5202, PETRI_PLACES=216, PETRI_TRANSITIONS=335} [2024-11-10 10:26:21,381 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 184 predicate places. [2024-11-10 10:26:21,381 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 335 transitions, 5202 flow [2024-11-10 10:26:21,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.368421052631579) internal successors, (292), 19 states have internal predecessors, (292), 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) [2024-11-10 10:26:21,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:21,382 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:21,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-10 10:26:21,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:21,583 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:21,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:21,583 INFO L85 PathProgramCache]: Analyzing trace with hash -385130509, now seen corresponding path program 4 times [2024-11-10 10:26:21,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:21,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982500140] [2024-11-10 10:26:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:21,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:22,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982500140] [2024-11-10 10:26:22,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982500140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637353021] [2024-11-10 10:26:22,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:26:22,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:22,126 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) [2024-11-10 10:26:22,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-10 10:26:22,227 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:26:22,228 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:22,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 10:26:22,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:22,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:26:22,444 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-10 10:26:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:22,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:22,584 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-11-10 10:26:22,585 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-11-10 10:26:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:22,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637353021] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:22,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:22,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 18 [2024-11-10 10:26:22,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94466480] [2024-11-10 10:26:22,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:22,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:26:22,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:22,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:26:22,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:26:22,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:22,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 335 transitions, 5202 flow. Second operand has 19 states, 19 states have (on average 15.368421052631579) internal successors, (292), 19 states have internal predecessors, (292), 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) [2024-11-10 10:26:22,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:22,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:22,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:24,162 INFO L124 PetriNetUnfolderBase]: 2275/4537 cut-off events. [2024-11-10 10:26:24,162 INFO L125 PetriNetUnfolderBase]: For 95941/95974 co-relation queries the response was YES. [2024-11-10 10:26:24,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27771 conditions, 4537 events. 2275/4537 cut-off events. For 95941/95974 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 32519 event pairs, 442 based on Foata normal form. 95/4604 useless extension candidates. Maximal degree in co-relation 27695. Up to 2606 conditions per place. [2024-11-10 10:26:24,199 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 254 selfloop transitions, 178 changer transitions 1/447 dead transitions. [2024-11-10 10:26:24,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 447 transitions, 6941 flow [2024-11-10 10:26:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-10 10:26:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-10 10:26:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 629 transitions. [2024-11-10 10:26:24,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4868421052631579 [2024-11-10 10:26:24,200 INFO L175 Difference]: Start difference. First operand has 216 places, 335 transitions, 5202 flow. Second operand 34 states and 629 transitions. [2024-11-10 10:26:24,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 447 transitions, 6941 flow [2024-11-10 10:26:24,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 447 transitions, 6653 flow, removed 18 selfloop flow, removed 18 redundant places. [2024-11-10 10:26:24,436 INFO L231 Difference]: Finished difference. Result has 232 places, 352 transitions, 5615 flow [2024-11-10 10:26:24,436 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4872, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5615, PETRI_PLACES=232, PETRI_TRANSITIONS=352} [2024-11-10 10:26:24,437 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 200 predicate places. [2024-11-10 10:26:24,437 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 352 transitions, 5615 flow [2024-11-10 10:26:24,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.368421052631579) internal successors, (292), 19 states have internal predecessors, (292), 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) [2024-11-10 10:26:24,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:24,437 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:24,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-10 10:26:24,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-10 10:26:24,638 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:24,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:24,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1241577579, now seen corresponding path program 5 times [2024-11-10 10:26:24,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:24,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461638289] [2024-11-10 10:26:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:24,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:25,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461638289] [2024-11-10 10:26:25,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461638289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366298763] [2024-11-10 10:26:25,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:26:25,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:25,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:25,155 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:26:25,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-10 10:26:25,258 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-10 10:26:25,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:25,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 10:26:25,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:25,480 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 10:26:25,481 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-10 10:26:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:25,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:25,550 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:26:25,551 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:26:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-10 10:26:25,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366298763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:25,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:25,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 18 [2024-11-10 10:26:25,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947973407] [2024-11-10 10:26:25,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:25,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:26:25,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:26:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:26:25,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:25,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 352 transitions, 5615 flow. Second operand has 19 states, 19 states have (on average 15.473684210526315) internal successors, (294), 19 states have internal predecessors, (294), 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) [2024-11-10 10:26:25,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:25,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:25,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:26,846 INFO L124 PetriNetUnfolderBase]: 2279/4524 cut-off events. [2024-11-10 10:26:26,846 INFO L125 PetriNetUnfolderBase]: For 102086/102136 co-relation queries the response was YES. [2024-11-10 10:26:26,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28852 conditions, 4524 events. 2279/4524 cut-off events. For 102086/102136 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 32339 event pairs, 499 based on Foata normal form. 20/4499 useless extension candidates. Maximal degree in co-relation 28772. Up to 3016 conditions per place. [2024-11-10 10:26:26,895 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 282 selfloop transitions, 100 changer transitions 17/413 dead transitions. [2024-11-10 10:26:26,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 413 transitions, 6858 flow [2024-11-10 10:26:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 10:26:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 10:26:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 333 transitions. [2024-11-10 10:26:26,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5154798761609907 [2024-11-10 10:26:26,896 INFO L175 Difference]: Start difference. First operand has 232 places, 352 transitions, 5615 flow. Second operand 17 states and 333 transitions. [2024-11-10 10:26:26,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 413 transitions, 6858 flow [2024-11-10 10:26:27,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 413 transitions, 6586 flow, removed 5 selfloop flow, removed 22 redundant places. [2024-11-10 10:26:27,248 INFO L231 Difference]: Finished difference. Result has 233 places, 358 transitions, 5824 flow [2024-11-10 10:26:27,248 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5365, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5824, PETRI_PLACES=233, PETRI_TRANSITIONS=358} [2024-11-10 10:26:27,248 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 201 predicate places. [2024-11-10 10:26:27,248 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 358 transitions, 5824 flow [2024-11-10 10:26:27,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.473684210526315) internal successors, (294), 19 states have internal predecessors, (294), 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) [2024-11-10 10:26:27,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:27,249 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:27,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-10 10:26:27,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-10 10:26:27,449 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:27,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:27,450 INFO L85 PathProgramCache]: Analyzing trace with hash -575435425, now seen corresponding path program 6 times [2024-11-10 10:26:27,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:27,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513987625] [2024-11-10 10:26:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:27,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:27,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:27,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513987625] [2024-11-10 10:26:27,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513987625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:27,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468665594] [2024-11-10 10:26:27,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:26:27,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:27,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:27,868 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:26:27,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-10 10:26:27,970 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-10 10:26:27,970 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:27,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 10:26:27,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:28,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:26:28,169 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-10 10:26:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:28,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:28,262 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:26:28,263 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:26:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-10 10:26:28,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468665594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:28,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:28,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 17 [2024-11-10 10:26:28,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894299124] [2024-11-10 10:26:28,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:28,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 10:26:28,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:28,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 10:26:28,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-10 10:26:28,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:28,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 358 transitions, 5824 flow. Second operand has 18 states, 18 states have (on average 15.444444444444445) internal successors, (278), 18 states have internal predecessors, (278), 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) [2024-11-10 10:26:28,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:28,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:28,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:29,711 INFO L124 PetriNetUnfolderBase]: 2307/4624 cut-off events. [2024-11-10 10:26:29,711 INFO L125 PetriNetUnfolderBase]: For 115479/115543 co-relation queries the response was YES. [2024-11-10 10:26:29,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29574 conditions, 4624 events. 2307/4624 cut-off events. For 115479/115543 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 33530 event pairs, 409 based on Foata normal form. 48/4635 useless extension candidates. Maximal degree in co-relation 29487. Up to 2754 conditions per place. [2024-11-10 10:26:29,749 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 306 selfloop transitions, 130 changer transitions 18/468 dead transitions. [2024-11-10 10:26:29,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 468 transitions, 7624 flow [2024-11-10 10:26:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-10 10:26:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-10 10:26:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 529 transitions. [2024-11-10 10:26:29,750 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5155945419103314 [2024-11-10 10:26:29,750 INFO L175 Difference]: Start difference. First operand has 233 places, 358 transitions, 5824 flow. Second operand 27 states and 529 transitions. [2024-11-10 10:26:29,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 468 transitions, 7624 flow [2024-11-10 10:26:30,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 468 transitions, 7261 flow, removed 105 selfloop flow, removed 11 redundant places. [2024-11-10 10:26:30,124 INFO L231 Difference]: Finished difference. Result has 255 places, 370 transitions, 6155 flow [2024-11-10 10:26:30,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5517, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6155, PETRI_PLACES=255, PETRI_TRANSITIONS=370} [2024-11-10 10:26:30,125 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 223 predicate places. [2024-11-10 10:26:30,125 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 370 transitions, 6155 flow [2024-11-10 10:26:30,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.444444444444445) internal successors, (278), 18 states have internal predecessors, (278), 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) [2024-11-10 10:26:30,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:30,125 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:30,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-10 10:26:30,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:30,330 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:30,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:30,330 INFO L85 PathProgramCache]: Analyzing trace with hash -445711645, now seen corresponding path program 7 times [2024-11-10 10:26:30,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:30,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422552612] [2024-11-10 10:26:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:30,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:30,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:30,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422552612] [2024-11-10 10:26:30,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422552612] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:30,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151466745] [2024-11-10 10:26:30,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:26:30,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:30,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:30,708 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:26:30,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-10 10:26:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:30,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 10:26:30,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:30,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:26:30,916 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-11-10 10:26:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:30,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:31,016 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:26:31,017 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:26:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-10 10:26:31,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151466745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:31,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:31,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-11-10 10:26:31,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694276835] [2024-11-10 10:26:31,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:31,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:26:31,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:26:31,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:26:31,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:31,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 370 transitions, 6155 flow. Second operand has 20 states, 20 states have (on average 15.7) internal successors, (314), 20 states have internal predecessors, (314), 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) [2024-11-10 10:26:31,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:31,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:31,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:32,265 INFO L124 PetriNetUnfolderBase]: 2045/4067 cut-off events. [2024-11-10 10:26:32,265 INFO L125 PetriNetUnfolderBase]: For 116864/116904 co-relation queries the response was YES. [2024-11-10 10:26:32,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26407 conditions, 4067 events. 2045/4067 cut-off events. For 116864/116904 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 28652 event pairs, 409 based on Foata normal form. 70/4100 useless extension candidates. Maximal degree in co-relation 26313. Up to 2754 conditions per place. [2024-11-10 10:26:32,302 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 278 selfloop transitions, 120 changer transitions 1/413 dead transitions. [2024-11-10 10:26:32,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 413 transitions, 6978 flow [2024-11-10 10:26:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-10 10:26:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-10 10:26:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 366 transitions. [2024-11-10 10:26:32,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5069252077562327 [2024-11-10 10:26:32,303 INFO L175 Difference]: Start difference. First operand has 255 places, 370 transitions, 6155 flow. Second operand 19 states and 366 transitions. [2024-11-10 10:26:32,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 413 transitions, 6978 flow [2024-11-10 10:26:32,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 413 transitions, 6678 flow, removed 41 selfloop flow, removed 23 redundant places. [2024-11-10 10:26:32,558 INFO L231 Difference]: Finished difference. Result has 245 places, 363 transitions, 5931 flow [2024-11-10 10:26:32,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5656, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5931, PETRI_PLACES=245, PETRI_TRANSITIONS=363} [2024-11-10 10:26:32,559 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 213 predicate places. [2024-11-10 10:26:32,559 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 363 transitions, 5931 flow [2024-11-10 10:26:32,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.7) internal successors, (314), 20 states have internal predecessors, (314), 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) [2024-11-10 10:26:32,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:32,559 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:32,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-10 10:26:32,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:32,759 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:32,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:32,760 INFO L85 PathProgramCache]: Analyzing trace with hash -227873667, now seen corresponding path program 8 times [2024-11-10 10:26:32,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:32,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482281624] [2024-11-10 10:26:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:32,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:33,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:33,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482281624] [2024-11-10 10:26:33,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482281624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:33,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022186683] [2024-11-10 10:26:33,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:26:33,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:33,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:33,203 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:26:33,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-10 10:26:33,303 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:26:33,303 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:33,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:26:33,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:33,543 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 10:26:33,543 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-10 10:26:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:26:33,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:33,631 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-11-10 10:26:33,632 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-11-10 10:26:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:33,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022186683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:33,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:33,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 19 [2024-11-10 10:26:33,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601147605] [2024-11-10 10:26:33,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:33,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:26:33,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:33,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:26:33,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:26:33,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:33,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 363 transitions, 5931 flow. Second operand has 20 states, 20 states have (on average 15.35) internal successors, (307), 20 states have internal predecessors, (307), 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) [2024-11-10 10:26:33,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:33,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:33,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:34,683 INFO L124 PetriNetUnfolderBase]: 2100/4157 cut-off events. [2024-11-10 10:26:34,683 INFO L125 PetriNetUnfolderBase]: For 95415/95490 co-relation queries the response was YES. [2024-11-10 10:26:34,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25867 conditions, 4157 events. 2100/4157 cut-off events. For 95415/95490 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 29443 event pairs, 371 based on Foata normal form. 24/4136 useless extension candidates. Maximal degree in co-relation 25783. Up to 2795 conditions per place. [2024-11-10 10:26:34,718 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 350 selfloop transitions, 48 changer transitions 30/442 dead transitions. [2024-11-10 10:26:34,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 442 transitions, 7615 flow [2024-11-10 10:26:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 10:26:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 10:26:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 323 transitions. [2024-11-10 10:26:34,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-10 10:26:34,719 INFO L175 Difference]: Start difference. First operand has 245 places, 363 transitions, 5931 flow. Second operand 17 states and 323 transitions. [2024-11-10 10:26:34,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 442 transitions, 7615 flow [2024-11-10 10:26:34,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 442 transitions, 7339 flow, removed 8 selfloop flow, removed 18 redundant places. [2024-11-10 10:26:34,989 INFO L231 Difference]: Finished difference. Result has 250 places, 367 transitions, 5921 flow [2024-11-10 10:26:34,989 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5921, PETRI_PLACES=250, PETRI_TRANSITIONS=367} [2024-11-10 10:26:34,990 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 218 predicate places. [2024-11-10 10:26:34,990 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 367 transitions, 5921 flow [2024-11-10 10:26:34,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.35) internal successors, (307), 20 states have internal predecessors, (307), 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) [2024-11-10 10:26:34,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:34,990 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:35,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-10 10:26:35,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-10 10:26:35,191 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:35,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:35,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1838538687, now seen corresponding path program 9 times [2024-11-10 10:26:35,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:35,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031032528] [2024-11-10 10:26:35,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:35,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:35,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031032528] [2024-11-10 10:26:35,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031032528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8151127] [2024-11-10 10:26:35,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:26:35,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:35,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:35,622 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:26:35,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-10 10:26:35,728 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 10:26:35,729 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:35,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:26:35,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:35,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:26:35,977 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-10 10:26:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:26:35,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:36,095 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-11-10 10:26:36,096 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-11-10 10:26:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:36,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8151127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:36,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:36,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 19 [2024-11-10 10:26:36,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909463460] [2024-11-10 10:26:36,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:36,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:26:36,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:36,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:26:36,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:26:36,289 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:36,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 367 transitions, 5921 flow. Second operand has 20 states, 20 states have (on average 15.3) internal successors, (306), 20 states have internal predecessors, (306), 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) [2024-11-10 10:26:36,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:36,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:36,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:37,314 INFO L124 PetriNetUnfolderBase]: 2139/4244 cut-off events. [2024-11-10 10:26:37,314 INFO L125 PetriNetUnfolderBase]: For 107613/107664 co-relation queries the response was YES. [2024-11-10 10:26:37,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26986 conditions, 4244 events. 2139/4244 cut-off events. For 107613/107664 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 30070 event pairs, 362 based on Foata normal form. 36/4239 useless extension candidates. Maximal degree in co-relation 26897. Up to 2764 conditions per place. [2024-11-10 10:26:37,352 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 354 selfloop transitions, 85 changer transitions 2/455 dead transitions. [2024-11-10 10:26:37,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 455 transitions, 7854 flow [2024-11-10 10:26:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 10:26:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-10 10:26:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 347 transitions. [2024-11-10 10:26:37,353 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5073099415204678 [2024-11-10 10:26:37,353 INFO L175 Difference]: Start difference. First operand has 250 places, 367 transitions, 5921 flow. Second operand 18 states and 347 transitions. [2024-11-10 10:26:37,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 455 transitions, 7854 flow [2024-11-10 10:26:37,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 455 transitions, 7627 flow, removed 60 selfloop flow, removed 13 redundant places. [2024-11-10 10:26:37,674 INFO L231 Difference]: Finished difference. Result has 255 places, 393 transitions, 6529 flow [2024-11-10 10:26:37,674 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6529, PETRI_PLACES=255, PETRI_TRANSITIONS=393} [2024-11-10 10:26:37,675 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 223 predicate places. [2024-11-10 10:26:37,675 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 393 transitions, 6529 flow [2024-11-10 10:26:37,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.3) internal successors, (306), 20 states have internal predecessors, (306), 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) [2024-11-10 10:26:37,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:37,676 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:37,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-10 10:26:37,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-10 10:26:37,876 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:37,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash -338597217, now seen corresponding path program 10 times [2024-11-10 10:26:37,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:37,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036709665] [2024-11-10 10:26:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:37,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:38,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036709665] [2024-11-10 10:26:38,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036709665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572667089] [2024-11-10 10:26:38,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:26:38,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:38,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:38,277 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:26:38,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-10 10:26:38,385 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:26:38,386 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:38,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 10:26:38,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:38,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:26:38,588 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-10 10:26:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:38,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:38,682 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:26:38,682 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:26:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 10:26:38,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572667089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:38,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:38,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 17 [2024-11-10 10:26:38,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729538018] [2024-11-10 10:26:38,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:38,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 10:26:38,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 10:26:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-10 10:26:38,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:38,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 393 transitions, 6529 flow. Second operand has 18 states, 18 states have (on average 15.444444444444445) internal successors, (278), 18 states have internal predecessors, (278), 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) [2024-11-10 10:26:38,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:38,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:38,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:40,279 INFO L124 PetriNetUnfolderBase]: 2365/4770 cut-off events. [2024-11-10 10:26:40,279 INFO L125 PetriNetUnfolderBase]: For 123516/123585 co-relation queries the response was YES. [2024-11-10 10:26:40,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29597 conditions, 4770 events. 2365/4770 cut-off events. For 123516/123585 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 35250 event pairs, 443 based on Foata normal form. 42/4764 useless extension candidates. Maximal degree in co-relation 29506. Up to 2967 conditions per place. [2024-11-10 10:26:40,316 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 382 selfloop transitions, 110 changer transitions 3/509 dead transitions. [2024-11-10 10:26:40,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 509 transitions, 9028 flow [2024-11-10 10:26:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-10 10:26:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-10 10:26:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 429 transitions. [2024-11-10 10:26:40,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5131578947368421 [2024-11-10 10:26:40,317 INFO L175 Difference]: Start difference. First operand has 255 places, 393 transitions, 6529 flow. Second operand 22 states and 429 transitions. [2024-11-10 10:26:40,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 509 transitions, 9028 flow [2024-11-10 10:26:40,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 509 transitions, 8693 flow, removed 116 selfloop flow, removed 11 redundant places. [2024-11-10 10:26:40,649 INFO L231 Difference]: Finished difference. Result has 274 places, 434 transitions, 7373 flow [2024-11-10 10:26:40,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=6241, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7373, PETRI_PLACES=274, PETRI_TRANSITIONS=434} [2024-11-10 10:26:40,650 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 242 predicate places. [2024-11-10 10:26:40,650 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 434 transitions, 7373 flow [2024-11-10 10:26:40,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.444444444444445) internal successors, (278), 18 states have internal predecessors, (278), 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) [2024-11-10 10:26:40,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:40,651 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:40,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-10 10:26:40,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-10 10:26:40,851 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:40,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:40,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1439349081, now seen corresponding path program 11 times [2024-11-10 10:26:40,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:40,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118757906] [2024-11-10 10:26:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:40,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:41,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:41,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118757906] [2024-11-10 10:26:41,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118757906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:41,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499182864] [2024-11-10 10:26:41,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:26:41,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:41,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:41,280 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:26:41,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-10 10:26:41,392 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-10 10:26:41,393 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:41,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 10:26:41,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:41,613 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-10 10:26:41,613 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2024-11-10 10:26:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:26:41,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:41,734 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-11-10 10:26:41,734 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-11-10 10:26:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:41,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499182864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:41,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:41,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 21 [2024-11-10 10:26:41,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236235004] [2024-11-10 10:26:41,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:41,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 10:26:41,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 10:26:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-10 10:26:41,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:41,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 434 transitions, 7373 flow. Second operand has 22 states, 22 states have (on average 15.590909090909092) internal successors, (343), 22 states have internal predecessors, (343), 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) [2024-11-10 10:26:41,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:41,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:41,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:43,409 INFO L124 PetriNetUnfolderBase]: 2390/4825 cut-off events. [2024-11-10 10:26:43,409 INFO L125 PetriNetUnfolderBase]: For 120081/120156 co-relation queries the response was YES. [2024-11-10 10:26:43,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30603 conditions, 4825 events. 2390/4825 cut-off events. For 120081/120156 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 35741 event pairs, 427 based on Foata normal form. 26/4798 useless extension candidates. Maximal degree in co-relation 30503. Up to 3383 conditions per place. [2024-11-10 10:26:43,467 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 388 selfloop transitions, 74 changer transitions 22/498 dead transitions. [2024-11-10 10:26:43,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 498 transitions, 8873 flow [2024-11-10 10:26:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 10:26:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-10 10:26:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 346 transitions. [2024-11-10 10:26:43,468 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5058479532163743 [2024-11-10 10:26:43,468 INFO L175 Difference]: Start difference. First operand has 274 places, 434 transitions, 7373 flow. Second operand 18 states and 346 transitions. [2024-11-10 10:26:43,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 498 transitions, 8873 flow [2024-11-10 10:26:43,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 498 transitions, 8501 flow, removed 143 selfloop flow, removed 12 redundant places. [2024-11-10 10:26:43,889 INFO L231 Difference]: Finished difference. Result has 284 places, 438 transitions, 7380 flow [2024-11-10 10:26:43,890 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=7037, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7380, PETRI_PLACES=284, PETRI_TRANSITIONS=438} [2024-11-10 10:26:43,890 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 252 predicate places. [2024-11-10 10:26:43,890 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 438 transitions, 7380 flow [2024-11-10 10:26:43,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 15.590909090909092) internal successors, (343), 22 states have internal predecessors, (343), 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) [2024-11-10 10:26:43,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:43,891 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:43,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-10 10:26:44,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-10 10:26:44,092 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:44,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:44,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1330317167, now seen corresponding path program 12 times [2024-11-10 10:26:44,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:44,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026881137] [2024-11-10 10:26:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:44,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:44,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:44,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026881137] [2024-11-10 10:26:44,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026881137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:44,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622135127] [2024-11-10 10:26:44,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:26:44,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:44,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:44,550 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:26:44,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-10 10:26:44,656 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-10 10:26:44,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:44,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-10 10:26:44,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:44,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:26:44,968 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-11-10 10:26:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:26:45,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:45,359 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-11-10 10:26:45,360 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-11-10 10:26:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:45,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622135127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:45,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:45,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 14] total 36 [2024-11-10 10:26:45,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130504965] [2024-11-10 10:26:45,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:45,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-10 10:26:45,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-10 10:26:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2024-11-10 10:26:45,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:26:45,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 438 transitions, 7380 flow. Second operand has 37 states, 37 states have (on average 10.972972972972974) internal successors, (406), 37 states have internal predecessors, (406), 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) [2024-11-10 10:26:45,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:45,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:26:45,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:50,526 INFO L124 PetriNetUnfolderBase]: 4605/8806 cut-off events. [2024-11-10 10:26:50,527 INFO L125 PetriNetUnfolderBase]: For 230895/230907 co-relation queries the response was YES. [2024-11-10 10:26:50,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55190 conditions, 8806 events. 4605/8806 cut-off events. For 230895/230907 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 68723 event pairs, 386 based on Foata normal form. 20/8820 useless extension candidates. Maximal degree in co-relation 55086. Up to 3274 conditions per place. [2024-11-10 10:26:50,607 INFO L140 encePairwiseOnDemand]: 22/38 looper letters, 495 selfloop transitions, 474 changer transitions 27/1003 dead transitions. [2024-11-10 10:26:50,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1003 transitions, 16903 flow [2024-11-10 10:26:50,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-10 10:26:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-11-10 10:26:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 969 transitions. [2024-11-10 10:26:50,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-11-10 10:26:50,610 INFO L175 Difference]: Start difference. First operand has 284 places, 438 transitions, 7380 flow. Second operand 63 states and 969 transitions. [2024-11-10 10:26:50,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1003 transitions, 16903 flow [2024-11-10 10:26:51,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1003 transitions, 16113 flow, removed 296 selfloop flow, removed 16 redundant places. [2024-11-10 10:26:51,500 INFO L231 Difference]: Finished difference. Result has 350 places, 730 transitions, 13874 flow [2024-11-10 10:26:51,501 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=7178, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=13874, PETRI_PLACES=350, PETRI_TRANSITIONS=730} [2024-11-10 10:26:51,501 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 318 predicate places. [2024-11-10 10:26:51,501 INFO L471 AbstractCegarLoop]: Abstraction has has 350 places, 730 transitions, 13874 flow [2024-11-10 10:26:51,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 10.972972972972974) internal successors, (406), 37 states have internal predecessors, (406), 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) [2024-11-10 10:26:51,502 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:51,502 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:51,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-10 10:26:51,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-10 10:26:51,702 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:51,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1460720375, now seen corresponding path program 13 times [2024-11-10 10:26:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:51,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136416344] [2024-11-10 10:26:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:51,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:52,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:52,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136416344] [2024-11-10 10:26:52,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136416344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:52,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404426370] [2024-11-10 10:26:52,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:26:52,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:52,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:52,085 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:26:52,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-10 10:26:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:52,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 10:26:52,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:52,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:26:52,301 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-11-10 10:26:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:26:52,308 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:52,382 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:26:52,382 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:26:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-10 10:26:52,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404426370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:52,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:52,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-11-10 10:26:52,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358803636] [2024-11-10 10:26:52,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:52,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:26:52,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:26:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:26:52,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:52,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 730 transitions, 13874 flow. Second operand has 20 states, 20 states have (on average 15.7) internal successors, (314), 20 states have internal predecessors, (314), 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) [2024-11-10 10:26:52,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:52,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:52,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:54,460 INFO L124 PetriNetUnfolderBase]: 3875/7651 cut-off events. [2024-11-10 10:26:54,460 INFO L125 PetriNetUnfolderBase]: For 219499/219622 co-relation queries the response was YES. [2024-11-10 10:26:54,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54201 conditions, 7651 events. 3875/7651 cut-off events. For 219499/219622 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 60582 event pairs, 735 based on Foata normal form. 41/7621 useless extension candidates. Maximal degree in co-relation 54080. Up to 5376 conditions per place. [2024-11-10 10:26:54,550 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 578 selfloop transitions, 180 changer transitions 9/786 dead transitions. [2024-11-10 10:26:54,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 786 transitions, 15748 flow [2024-11-10 10:26:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-10 10:26:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-10 10:26:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 412 transitions. [2024-11-10 10:26:54,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49282296650717705 [2024-11-10 10:26:54,551 INFO L175 Difference]: Start difference. First operand has 350 places, 730 transitions, 13874 flow. Second operand 22 states and 412 transitions. [2024-11-10 10:26:54,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 786 transitions, 15748 flow [2024-11-10 10:26:56,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 786 transitions, 15128 flow, removed 224 selfloop flow, removed 16 redundant places. [2024-11-10 10:26:56,057 INFO L231 Difference]: Finished difference. Result has 354 places, 728 transitions, 13687 flow [2024-11-10 10:26:56,057 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13205, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=13687, PETRI_PLACES=354, PETRI_TRANSITIONS=728} [2024-11-10 10:26:56,058 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 322 predicate places. [2024-11-10 10:26:56,058 INFO L471 AbstractCegarLoop]: Abstraction has has 354 places, 728 transitions, 13687 flow [2024-11-10 10:26:56,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.7) internal successors, (314), 20 states have internal predecessors, (314), 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) [2024-11-10 10:26:56,058 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:26:56,058 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:26:56,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-10 10:26:56,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:56,259 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:26:56,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:26:56,259 INFO L85 PathProgramCache]: Analyzing trace with hash 474826637, now seen corresponding path program 14 times [2024-11-10 10:26:56,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:26:56,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101699723] [2024-11-10 10:26:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:26:56,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:26:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:26:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:26:56,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:26:56,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101699723] [2024-11-10 10:26:56,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101699723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:26:56,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586527430] [2024-11-10 10:26:56,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:26:56,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:26:56,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:26:56,664 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:26:56,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-10 10:26:56,760 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:26:56,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:26:56,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:26:56,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:26:56,976 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-10 10:26:56,976 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-10 10:26:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:26:56,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:26:57,053 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-10 10:26:57,053 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-10 10:26:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-10 10:26:57,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586527430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:26:57,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:26:57,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 18 [2024-11-10 10:26:57,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29991398] [2024-11-10 10:26:57,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:26:57,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:26:57,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:26:57,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:26:57,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:26:57,262 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:26:57,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 728 transitions, 13687 flow. Second operand has 19 states, 19 states have (on average 15.368421052631579) internal successors, (292), 19 states have internal predecessors, (292), 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) [2024-11-10 10:26:57,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:26:57,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:26:57,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:26:59,634 INFO L124 PetriNetUnfolderBase]: 3874/7665 cut-off events. [2024-11-10 10:26:59,634 INFO L125 PetriNetUnfolderBase]: For 221461/221566 co-relation queries the response was YES. [2024-11-10 10:26:59,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52918 conditions, 7665 events. 3874/7665 cut-off events. For 221461/221566 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 60660 event pairs, 556 based on Foata normal form. 53/7647 useless extension candidates. Maximal degree in co-relation 52800. Up to 4569 conditions per place. [2024-11-10 10:26:59,824 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 568 selfloop transitions, 235 changer transitions 2/824 dead transitions. [2024-11-10 10:26:59,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 824 transitions, 16355 flow [2024-11-10 10:26:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-10 10:26:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-10 10:26:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 395 transitions. [2024-11-10 10:26:59,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5197368421052632 [2024-11-10 10:26:59,826 INFO L175 Difference]: Start difference. First operand has 354 places, 728 transitions, 13687 flow. Second operand 20 states and 395 transitions. [2024-11-10 10:26:59,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 824 transitions, 16355 flow [2024-11-10 10:27:00,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 824 transitions, 15982 flow, removed 9 selfloop flow, removed 18 redundant places. [2024-11-10 10:27:00,873 INFO L231 Difference]: Finished difference. Result has 354 places, 732 transitions, 13925 flow [2024-11-10 10:27:00,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13238, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13925, PETRI_PLACES=354, PETRI_TRANSITIONS=732} [2024-11-10 10:27:00,874 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 322 predicate places. [2024-11-10 10:27:00,874 INFO L471 AbstractCegarLoop]: Abstraction has has 354 places, 732 transitions, 13925 flow [2024-11-10 10:27:00,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.368421052631579) internal successors, (292), 19 states have internal predecessors, (292), 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) [2024-11-10 10:27:00,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:00,874 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:00,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-10 10:27:01,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-10 10:27:01,075 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:01,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:01,075 INFO L85 PathProgramCache]: Analyzing trace with hash 623229419, now seen corresponding path program 1 times [2024-11-10 10:27:01,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:01,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611877161] [2024-11-10 10:27:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:01,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:27:01,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:01,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611877161] [2024-11-10 10:27:01,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611877161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:01,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699699439] [2024-11-10 10:27:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:01,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:01,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:01,482 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:27:01,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-10 10:27:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:01,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 10:27:01,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:01,740 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-10 10:27:01,740 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-11-10 10:27:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:27:01,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:01,832 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-11-10 10:27:01,833 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-11-10 10:27:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:27:01,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699699439] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:01,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:01,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 21 [2024-11-10 10:27:01,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236131548] [2024-11-10 10:27:01,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:01,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 10:27:01,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 10:27:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-10 10:27:02,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:27:02,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 732 transitions, 13925 flow. Second operand has 22 states, 22 states have (on average 15.681818181818182) internal successors, (345), 22 states have internal predecessors, (345), 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) [2024-11-10 10:27:02,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:02,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:27:02,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand