./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/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 ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:49:20,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:49:20,963 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:49:20,966 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:49:20,966 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:49:20,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:49:20,985 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:49:20,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:49:20,986 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:49:20,986 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:49:20,987 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:49:20,987 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:49:20,987 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:49:20,987 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:49:20,988 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:49:20,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:49:20,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:49:20,988 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:49:20,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:49:20,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:49:20,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:49:20,989 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:49:20,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:49:20,990 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:49:20,990 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:49:20,990 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:49:20,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:49:20,991 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:49:20,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:49:20,991 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:49:20,992 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:49:20,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:49:20,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:49:20,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:49:20,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:49:20,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:49:20,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:49:20,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:49:20,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:49:20,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:49:20,994 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:49:20,995 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:49:20,996 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:49:20,996 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-06-27 16:49:21,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:49:21,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:49:21,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:49:21,183 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:49:21,183 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:49:21,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2024-06-27 16:49:22,194 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:49:22,363 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:49:22,366 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2024-06-27 16:49:22,380 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/846ff2510/90d2fd2b99aa4cb7bb24ec8f31c02920/FLAGd21c79e7d [2024-06-27 16:49:22,390 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/846ff2510/90d2fd2b99aa4cb7bb24ec8f31c02920 [2024-06-27 16:49:22,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:49:22,397 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:49:22,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:49:22,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:49:22,408 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:49:22,409 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,409 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761362e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22, skipping insertion in model container [2024-06-27 16:49:22,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,429 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:49:22,577 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-06-27 16:49:22,598 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:49:22,606 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:49:22,639 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-06-27 16:49:22,647 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:49:22,662 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:49:22,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22 WrapperNode [2024-06-27 16:49:22,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:49:22,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:49:22,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:49:22,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:49:22,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,701 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 191 [2024-06-27 16:49:22,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:49:22,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:49:22,706 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:49:22,706 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:49:22,717 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,720 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,775 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 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]. [2024-06-27 16:49:22,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,782 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,791 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,793 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,794 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,796 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:49:22,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:49:22,797 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:49:22,797 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:49:22,797 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (1/1) ... [2024-06-27 16:49:22,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:49:22,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:22,843 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) [2024-06-27 16:49:22,881 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 [2024-06-27 16:49:22,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:49:22,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:49:22,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:49:22,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:49:22,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:49:22,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:49:22,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:49:22,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:49:22,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:49:22,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:49:22,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:49:22,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:49:22,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:49:22,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:49:22,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:49:22,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:49:22,906 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:49:22,991 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:49:22,992 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:49:23,205 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:49:23,205 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:49:23,401 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:49:23,401 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 16:49:23,402 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:49:23 BoogieIcfgContainer [2024-06-27 16:49:23,402 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:49:23,404 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:49:23,404 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:49:23,406 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:49:23,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:49:22" (1/3) ... [2024-06-27 16:49:23,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faa36e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:49:23, skipping insertion in model container [2024-06-27 16:49:23,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:49:22" (2/3) ... [2024-06-27 16:49:23,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faa36e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:49:23, skipping insertion in model container [2024-06-27 16:49:23,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:49:23" (3/3) ... [2024-06-27 16:49:23,412 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-06-27 16:49:23,419 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:49:23,425 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:49:23,426 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:49:23,426 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:49:23,475 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:49:23,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2024-06-27 16:49:23,535 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-06-27 16:49:23,537 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:49:23,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-06-27 16:49:23,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2024-06-27 16:49:23,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 23 transitions, 58 flow [2024-06-27 16:49:23,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:49:23,559 INFO L357 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, mHoare=true, 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;@19505c6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:49:23,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:49:23,574 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:49:23,575 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-06-27 16:49:23,575 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:49:23,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:23,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:23,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:23,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:23,583 INFO L85 PathProgramCache]: Analyzing trace with hash -917773730, now seen corresponding path program 1 times [2024-06-27 16:49:23,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:23,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744236207] [2024-06-27 16:49:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:23,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:23,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744236207] [2024-06-27 16:49:23,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744236207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:23,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:23,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:49:23,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420231067] [2024-06-27 16:49:23,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:23,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:49:23,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:49:23,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:49:23,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 16:49:23,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2024-06-27 16:49:23,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:23,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 16:49:23,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:23,920 INFO L124 PetriNetUnfolderBase]: 94/185 cut-off events. [2024-06-27 16:49:23,920 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 16:49:23,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 185 events. 94/185 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 595 event pairs, 22 based on Foata normal form. 1/183 useless extension candidates. Maximal degree in co-relation 317. Up to 113 conditions per place. [2024-06-27 16:49:23,923 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 27 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2024-06-27 16:49:23,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 151 flow [2024-06-27 16:49:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:49:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:49:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-06-27 16:49:23,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-27 16:49:23,933 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 3 states and 47 transitions. [2024-06-27 16:49:23,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 151 flow [2024-06-27 16:49:23,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:49:23,937 INFO L231 Difference]: Finished difference. Result has 25 places, 25 transitions, 69 flow [2024-06-27 16:49:23,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=25, PETRI_TRANSITIONS=25} [2024-06-27 16:49:23,941 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-06-27 16:49:23,941 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 25 transitions, 69 flow [2024-06-27 16:49:23,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2024-06-27 16:49:23,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:23,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:23,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:49:23,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:23,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:23,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1358368092, now seen corresponding path program 1 times [2024-06-27 16:49:23,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:23,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700295595] [2024-06-27 16:49:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:23,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:24,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:24,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700295595] [2024-06-27 16:49:24,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700295595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:24,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:24,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:49:24,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270393801] [2024-06-27 16:49:24,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:24,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:49:24,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:24,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:49:24,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:49:24,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-06-27 16:49:24,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:24,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:24,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-06-27 16:49:24,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:24,266 INFO L124 PetriNetUnfolderBase]: 188/338 cut-off events. [2024-06-27 16:49:24,267 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-06-27 16:49:24,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 338 events. 188/338 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1342 event pairs, 62 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 197. Up to 187 conditions per place. [2024-06-27 16:49:24,274 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 39 selfloop transitions, 9 changer transitions 1/51 dead transitions. [2024-06-27 16:49:24,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 51 transitions, 240 flow [2024-06-27 16:49:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:49:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:49:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-06-27 16:49:24,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:49:24,277 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 69 flow. Second operand 5 states and 65 transitions. [2024-06-27 16:49:24,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 51 transitions, 240 flow [2024-06-27 16:49:24,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 51 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:49:24,281 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 124 flow [2024-06-27 16:49:24,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2024-06-27 16:49:24,283 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-06-27 16:49:24,283 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 124 flow [2024-06-27 16:49:24,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:24,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:24,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:24,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:49:24,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:24,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1429312728, now seen corresponding path program 2 times [2024-06-27 16:49:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:24,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883630573] [2024-06-27 16:49:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:24,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:24,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:24,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883630573] [2024-06-27 16:49:24,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883630573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:24,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:24,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:49:24,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294474512] [2024-06-27 16:49:24,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:24,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:49:24,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:24,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:49:24,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:49:24,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-06-27 16:49:24,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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) [2024-06-27 16:49:24,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:24,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-06-27 16:49:24,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:24,628 INFO L124 PetriNetUnfolderBase]: 230/424 cut-off events. [2024-06-27 16:49:24,628 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-06-27 16:49:24,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 424 events. 230/424 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1838 event pairs, 30 based on Foata normal form. 13/435 useless extension candidates. Maximal degree in co-relation 567. Up to 122 conditions per place. [2024-06-27 16:49:24,631 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 62 selfloop transitions, 12 changer transitions 1/77 dead transitions. [2024-06-27 16:49:24,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 77 transitions, 437 flow [2024-06-27 16:49:24,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:49:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:49:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-27 16:49:24,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2024-06-27 16:49:24,632 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 124 flow. Second operand 7 states and 92 transitions. [2024-06-27 16:49:24,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 77 transitions, 437 flow [2024-06-27 16:49:24,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 77 transitions, 437 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:49:24,635 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 212 flow [2024-06-27 16:49:24,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-06-27 16:49:24,636 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2024-06-27 16:49:24,636 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 212 flow [2024-06-27 16:49:24,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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) [2024-06-27 16:49:24,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:24,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:24,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:49:24,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:24,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:24,637 INFO L85 PathProgramCache]: Analyzing trace with hash 469608532, now seen corresponding path program 3 times [2024-06-27 16:49:24,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:24,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5626887] [2024-06-27 16:49:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:24,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:24,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:24,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5626887] [2024-06-27 16:49:24,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5626887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:24,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:24,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:49:24,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099011809] [2024-06-27 16:49:24,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:24,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:49:24,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:24,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:49:24,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:49:24,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-06-27 16:49:24,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:24,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:24,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-06-27 16:49:24,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:24,804 INFO L124 PetriNetUnfolderBase]: 292/535 cut-off events. [2024-06-27 16:49:24,804 INFO L125 PetriNetUnfolderBase]: For 857/857 co-relation queries the response was YES. [2024-06-27 16:49:24,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1835 conditions, 535 events. 292/535 cut-off events. For 857/857 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2346 event pairs, 92 based on Foata normal form. 2/529 useless extension candidates. Maximal degree in co-relation 1351. Up to 262 conditions per place. [2024-06-27 16:49:24,808 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 52 selfloop transitions, 10 changer transitions 4/68 dead transitions. [2024-06-27 16:49:24,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 497 flow [2024-06-27 16:49:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:49:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:49:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-06-27 16:49:24,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-06-27 16:49:24,809 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 212 flow. Second operand 5 states and 63 transitions. [2024-06-27 16:49:24,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 497 flow [2024-06-27 16:49:24,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 485 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 16:49:24,813 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 259 flow [2024-06-27 16:49:24,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 16:49:24,814 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2024-06-27 16:49:24,814 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 259 flow [2024-06-27 16:49:24,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:24,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:24,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:24,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:49:24,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:24,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:24,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1005547373, now seen corresponding path program 1 times [2024-06-27 16:49:24,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:24,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438122983] [2024-06-27 16:49:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:24,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:24,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438122983] [2024-06-27 16:49:24,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438122983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:24,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:24,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:49:24,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435920910] [2024-06-27 16:49:24,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:24,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:49:24,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:24,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:49:24,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:49:24,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-06-27 16:49:24,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:24,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:24,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-06-27 16:49:24,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:24,994 INFO L124 PetriNetUnfolderBase]: 305/553 cut-off events. [2024-06-27 16:49:24,995 INFO L125 PetriNetUnfolderBase]: For 1229/1233 co-relation queries the response was YES. [2024-06-27 16:49:24,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2039 conditions, 553 events. 305/553 cut-off events. For 1229/1233 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2519 event pairs, 107 based on Foata normal form. 3/549 useless extension candidates. Maximal degree in co-relation 1783. Up to 290 conditions per place. [2024-06-27 16:49:24,998 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 52 selfloop transitions, 7 changer transitions 7/69 dead transitions. [2024-06-27 16:49:24,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 533 flow [2024-06-27 16:49:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:49:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:49:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-06-27 16:49:25,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2024-06-27 16:49:25,000 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 259 flow. Second operand 5 states and 67 transitions. [2024-06-27 16:49:25,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 533 flow [2024-06-27 16:49:25,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 494 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 16:49:25,004 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 261 flow [2024-06-27 16:49:25,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2024-06-27 16:49:25,005 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 25 predicate places. [2024-06-27 16:49:25,005 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 261 flow [2024-06-27 16:49:25,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:25,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:25,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:25,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:49:25,006 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:25,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash -710500163, now seen corresponding path program 2 times [2024-06-27 16:49:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:25,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308492159] [2024-06-27 16:49:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:25,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:25,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308492159] [2024-06-27 16:49:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308492159] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:25,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424823923] [2024-06-27 16:49:25,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:49:25,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:25,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:25,066 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) [2024-06-27 16:49:25,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:49:25,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:49:25,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:25,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 16:49:25,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:25,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:25,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424823923] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:25,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:25,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-06-27 16:49:25,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839964855] [2024-06-27 16:49:25,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:25,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:49:25,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:25,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:49:25,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:49:25,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:25,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 261 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 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) [2024-06-27 16:49:25,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:25,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:25,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:25,505 INFO L124 PetriNetUnfolderBase]: 428/738 cut-off events. [2024-06-27 16:49:25,506 INFO L125 PetriNetUnfolderBase]: For 1900/1900 co-relation queries the response was YES. [2024-06-27 16:49:25,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2730 conditions, 738 events. 428/738 cut-off events. For 1900/1900 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3120 event pairs, 22 based on Foata normal form. 12/748 useless extension candidates. Maximal degree in co-relation 2151. Up to 147 conditions per place. [2024-06-27 16:49:25,510 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 75 selfloop transitions, 52 changer transitions 2/130 dead transitions. [2024-06-27 16:49:25,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 130 transitions, 1038 flow [2024-06-27 16:49:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:49:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:49:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2024-06-27 16:49:25,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3708791208791209 [2024-06-27 16:49:25,513 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 261 flow. Second operand 14 states and 135 transitions. [2024-06-27 16:49:25,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 130 transitions, 1038 flow [2024-06-27 16:49:25,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 130 transitions, 981 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 16:49:25,517 INFO L231 Difference]: Finished difference. Result has 65 places, 79 transitions, 678 flow [2024-06-27 16:49:25,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=678, PETRI_PLACES=65, PETRI_TRANSITIONS=79} [2024-06-27 16:49:25,518 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2024-06-27 16:49:25,518 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 79 transitions, 678 flow [2024-06-27 16:49:25,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 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) [2024-06-27 16:49:25,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:25,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:25,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 16:49:25,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 16:49:25,732 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:25,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1226407250, now seen corresponding path program 4 times [2024-06-27 16:49:25,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:25,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527979027] [2024-06-27 16:49:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:25,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:25,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:25,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527979027] [2024-06-27 16:49:25,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527979027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:25,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:25,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:49:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584750577] [2024-06-27 16:49:25,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:25,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:49:25,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:25,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:49:25,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:49:25,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:25,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 79 transitions, 678 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2024-06-27 16:49:25,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:25,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:25,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:25,884 INFO L124 PetriNetUnfolderBase]: 417/721 cut-off events. [2024-06-27 16:49:25,885 INFO L125 PetriNetUnfolderBase]: For 2403/2403 co-relation queries the response was YES. [2024-06-27 16:49:25,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3007 conditions, 721 events. 417/721 cut-off events. For 2403/2403 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3054 event pairs, 131 based on Foata normal form. 8/727 useless extension candidates. Maximal degree in co-relation 2651. Up to 433 conditions per place. [2024-06-27 16:49:25,889 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 77 selfloop transitions, 27 changer transitions 0/105 dead transitions. [2024-06-27 16:49:25,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 1018 flow [2024-06-27 16:49:25,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:49:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:49:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-06-27 16:49:25,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-06-27 16:49:25,890 INFO L175 Difference]: Start difference. First operand has 65 places, 79 transitions, 678 flow. Second operand 5 states and 64 transitions. [2024-06-27 16:49:25,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 1018 flow [2024-06-27 16:49:25,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 953 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 16:49:25,897 INFO L231 Difference]: Finished difference. Result has 67 places, 80 transitions, 682 flow [2024-06-27 16:49:25,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=682, PETRI_PLACES=67, PETRI_TRANSITIONS=80} [2024-06-27 16:49:25,898 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2024-06-27 16:49:25,898 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 80 transitions, 682 flow [2024-06-27 16:49:25,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2024-06-27 16:49:25,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:25,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:25,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:49:25,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:25,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:25,899 INFO L85 PathProgramCache]: Analyzing trace with hash -641270421, now seen corresponding path program 3 times [2024-06-27 16:49:25,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:25,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057103212] [2024-06-27 16:49:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:25,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:25,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:25,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057103212] [2024-06-27 16:49:25,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057103212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:25,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:25,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:49:25,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741069113] [2024-06-27 16:49:25,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:25,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:49:25,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:25,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:49:25,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:49:25,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:25,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 682 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2024-06-27 16:49:25,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:25,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:25,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:26,097 INFO L124 PetriNetUnfolderBase]: 429/741 cut-off events. [2024-06-27 16:49:26,097 INFO L125 PetriNetUnfolderBase]: For 2543/2543 co-relation queries the response was YES. [2024-06-27 16:49:26,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3128 conditions, 741 events. 429/741 cut-off events. For 2543/2543 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3163 event pairs, 132 based on Foata normal form. 8/747 useless extension candidates. Maximal degree in co-relation 2815. Up to 433 conditions per place. [2024-06-27 16:49:26,101 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 81 selfloop transitions, 34 changer transitions 0/116 dead transitions. [2024-06-27 16:49:26,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 116 transitions, 1106 flow [2024-06-27 16:49:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:49:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:49:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2024-06-27 16:49:26,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-27 16:49:26,103 INFO L175 Difference]: Start difference. First operand has 67 places, 80 transitions, 682 flow. Second operand 6 states and 73 transitions. [2024-06-27 16:49:26,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 116 transitions, 1106 flow [2024-06-27 16:49:26,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 116 transitions, 1034 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:49:26,109 INFO L231 Difference]: Finished difference. Result has 69 places, 83 transitions, 723 flow [2024-06-27 16:49:26,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=69, PETRI_TRANSITIONS=83} [2024-06-27 16:49:26,110 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 43 predicate places. [2024-06-27 16:49:26,110 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 83 transitions, 723 flow [2024-06-27 16:49:26,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2024-06-27 16:49:26,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:26,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:26,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 16:49:26,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:26,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:26,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1589498937, now seen corresponding path program 4 times [2024-06-27 16:49:26,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:26,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866858185] [2024-06-27 16:49:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:26,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:26,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:26,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866858185] [2024-06-27 16:49:26,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866858185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:26,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:26,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:49:26,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790622289] [2024-06-27 16:49:26,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:26,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:49:26,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:26,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:49:26,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:49:26,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-06-27 16:49:26,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 83 transitions, 723 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:26,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:26,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-06-27 16:49:26,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:26,281 INFO L124 PetriNetUnfolderBase]: 383/686 cut-off events. [2024-06-27 16:49:26,282 INFO L125 PetriNetUnfolderBase]: For 2408/2426 co-relation queries the response was YES. [2024-06-27 16:49:26,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2941 conditions, 686 events. 383/686 cut-off events. For 2408/2426 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3081 event pairs, 113 based on Foata normal form. 3/679 useless extension candidates. Maximal degree in co-relation 2553. Up to 394 conditions per place. [2024-06-27 16:49:26,286 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 63 selfloop transitions, 23 changer transitions 4/108 dead transitions. [2024-06-27 16:49:26,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 108 transitions, 1042 flow [2024-06-27 16:49:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:49:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:49:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-06-27 16:49:26,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-06-27 16:49:26,287 INFO L175 Difference]: Start difference. First operand has 69 places, 83 transitions, 723 flow. Second operand 5 states and 63 transitions. [2024-06-27 16:49:26,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 108 transitions, 1042 flow [2024-06-27 16:49:26,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 994 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 16:49:26,296 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 714 flow [2024-06-27 16:49:26,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=714, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2024-06-27 16:49:26,298 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 45 predicate places. [2024-06-27 16:49:26,298 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 714 flow [2024-06-27 16:49:26,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:26,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:26,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:26,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 16:49:26,300 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:26,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1656258960, now seen corresponding path program 5 times [2024-06-27 16:49:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:26,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095919276] [2024-06-27 16:49:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:26,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:26,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:26,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095919276] [2024-06-27 16:49:26,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095919276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:26,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:26,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:49:26,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204506879] [2024-06-27 16:49:26,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:26,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:49:26,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:49:26,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:49:26,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:26,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 714 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2024-06-27 16:49:26,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:26,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:26,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:26,520 INFO L124 PetriNetUnfolderBase]: 492/849 cut-off events. [2024-06-27 16:49:26,521 INFO L125 PetriNetUnfolderBase]: For 2706/2706 co-relation queries the response was YES. [2024-06-27 16:49:26,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3606 conditions, 849 events. 492/849 cut-off events. For 2706/2706 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3784 event pairs, 129 based on Foata normal form. 9/856 useless extension candidates. Maximal degree in co-relation 3116. Up to 439 conditions per place. [2024-06-27 16:49:26,525 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 90 selfloop transitions, 30 changer transitions 0/121 dead transitions. [2024-06-27 16:49:26,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 121 transitions, 1183 flow [2024-06-27 16:49:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:49:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:49:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-06-27 16:49:26,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-27 16:49:26,527 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 714 flow. Second operand 6 states and 74 transitions. [2024-06-27 16:49:26,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 121 transitions, 1183 flow [2024-06-27 16:49:26,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 121 transitions, 1127 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 16:49:26,534 INFO L231 Difference]: Finished difference. Result has 72 places, 86 transitions, 779 flow [2024-06-27 16:49:26,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=72, PETRI_TRANSITIONS=86} [2024-06-27 16:49:26,536 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2024-06-27 16:49:26,536 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 86 transitions, 779 flow [2024-06-27 16:49:26,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2024-06-27 16:49:26,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:26,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:26,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 16:49:26,536 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:26,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:26,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1210490047, now seen corresponding path program 5 times [2024-06-27 16:49:26,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:26,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254755990] [2024-06-27 16:49:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:26,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:26,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:26,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254755990] [2024-06-27 16:49:26,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254755990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:26,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:26,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:49:26,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412314708] [2024-06-27 16:49:26,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:26,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:49:26,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:26,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:49:26,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:49:26,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-06-27 16:49:26,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 86 transitions, 779 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:26,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:26,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-06-27 16:49:26,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:26,730 INFO L124 PetriNetUnfolderBase]: 433/779 cut-off events. [2024-06-27 16:49:26,730 INFO L125 PetriNetUnfolderBase]: For 3021/3045 co-relation queries the response was YES. [2024-06-27 16:49:26,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3340 conditions, 779 events. 433/779 cut-off events. For 3021/3045 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3641 event pairs, 137 based on Foata normal form. 3/773 useless extension candidates. Maximal degree in co-relation 2867. Up to 412 conditions per place. [2024-06-27 16:49:26,735 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 60 selfloop transitions, 30 changer transitions 1/109 dead transitions. [2024-06-27 16:49:26,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 1116 flow [2024-06-27 16:49:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:49:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:49:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-06-27 16:49:26,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:49:26,736 INFO L175 Difference]: Start difference. First operand has 72 places, 86 transitions, 779 flow. Second operand 5 states and 65 transitions. [2024-06-27 16:49:26,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 1116 flow [2024-06-27 16:49:26,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 109 transitions, 1057 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 16:49:26,742 INFO L231 Difference]: Finished difference. Result has 74 places, 92 transitions, 876 flow [2024-06-27 16:49:26,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=876, PETRI_PLACES=74, PETRI_TRANSITIONS=92} [2024-06-27 16:49:26,743 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-06-27 16:49:26,743 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 92 transitions, 876 flow [2024-06-27 16:49:26,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:26,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:26,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:26,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 16:49:26,743 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:26,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:26,744 INFO L85 PathProgramCache]: Analyzing trace with hash -111148459, now seen corresponding path program 6 times [2024-06-27 16:49:26,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:26,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842273780] [2024-06-27 16:49:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:26,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:26,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:26,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842273780] [2024-06-27 16:49:26,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842273780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:26,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:26,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:49:26,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572215057] [2024-06-27 16:49:26,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:26,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:49:26,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:49:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:49:26,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:26,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 92 transitions, 876 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2024-06-27 16:49:26,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:26,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:26,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:26,974 INFO L124 PetriNetUnfolderBase]: 506/874 cut-off events. [2024-06-27 16:49:26,975 INFO L125 PetriNetUnfolderBase]: For 3156/3156 co-relation queries the response was YES. [2024-06-27 16:49:26,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3703 conditions, 874 events. 506/874 cut-off events. For 3156/3156 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3922 event pairs, 140 based on Foata normal form. 16/888 useless extension candidates. Maximal degree in co-relation 3445. Up to 411 conditions per place. [2024-06-27 16:49:26,980 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 80 selfloop transitions, 35 changer transitions 2/118 dead transitions. [2024-06-27 16:49:26,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 1232 flow [2024-06-27 16:49:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:49:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:49:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2024-06-27 16:49:26,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-27 16:49:26,981 INFO L175 Difference]: Start difference. First operand has 74 places, 92 transitions, 876 flow. Second operand 6 states and 76 transitions. [2024-06-27 16:49:26,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 1232 flow [2024-06-27 16:49:26,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 118 transitions, 1185 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 16:49:26,989 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 921 flow [2024-06-27 16:49:26,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=921, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-06-27 16:49:26,989 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2024-06-27 16:49:26,990 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 921 flow [2024-06-27 16:49:26,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2024-06-27 16:49:26,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:26,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:26,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 16:49:26,990 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:26,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:26,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2077923714, now seen corresponding path program 6 times [2024-06-27 16:49:26,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:26,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12361823] [2024-06-27 16:49:26,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:26,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:27,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:27,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12361823] [2024-06-27 16:49:27,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12361823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:27,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:27,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:49:27,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952441323] [2024-06-27 16:49:27,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:27,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:49:27,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:27,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:49:27,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:49:27,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-06-27 16:49:27,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 921 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:27,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:27,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-06-27 16:49:27,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:27,151 INFO L124 PetriNetUnfolderBase]: 416/749 cut-off events. [2024-06-27 16:49:27,152 INFO L125 PetriNetUnfolderBase]: For 2955/2967 co-relation queries the response was YES. [2024-06-27 16:49:27,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 749 events. 416/749 cut-off events. For 2955/2967 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3510 event pairs, 128 based on Foata normal form. 2/743 useless extension candidates. Maximal degree in co-relation 3056. Up to 399 conditions per place. [2024-06-27 16:49:27,156 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 70 selfloop transitions, 27 changer transitions 2/106 dead transitions. [2024-06-27 16:49:27,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 1160 flow [2024-06-27 16:49:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:49:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:49:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-06-27 16:49:27,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 16:49:27,157 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 921 flow. Second operand 5 states and 60 transitions. [2024-06-27 16:49:27,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 1160 flow [2024-06-27 16:49:27,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 1067 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 16:49:27,163 INFO L231 Difference]: Finished difference. Result has 74 places, 93 transitions, 874 flow [2024-06-27 16:49:27,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=874, PETRI_PLACES=74, PETRI_TRANSITIONS=93} [2024-06-27 16:49:27,164 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-06-27 16:49:27,164 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 93 transitions, 874 flow [2024-06-27 16:49:27,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-27 16:49:27,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:27,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:27,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 16:49:27,165 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:27,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:27,165 INFO L85 PathProgramCache]: Analyzing trace with hash 201793112, now seen corresponding path program 7 times [2024-06-27 16:49:27,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:27,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13357747] [2024-06-27 16:49:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:27,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:27,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:27,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13357747] [2024-06-27 16:49:27,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13357747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:27,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:27,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:49:27,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075284578] [2024-06-27 16:49:27,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:27,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:49:27,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:27,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:49:27,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:49:27,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:27,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 93 transitions, 874 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2024-06-27 16:49:27,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:27,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:27,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:27,355 INFO L124 PetriNetUnfolderBase]: 483/821 cut-off events. [2024-06-27 16:49:27,355 INFO L125 PetriNetUnfolderBase]: For 2944/2944 co-relation queries the response was YES. [2024-06-27 16:49:27,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 821 events. 483/821 cut-off events. For 2944/2944 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3565 event pairs, 145 based on Foata normal form. 9/828 useless extension candidates. Maximal degree in co-relation 2844. Up to 457 conditions per place. [2024-06-27 16:49:27,359 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 81 selfloop transitions, 31 changer transitions 1/114 dead transitions. [2024-06-27 16:49:27,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 114 transitions, 1180 flow [2024-06-27 16:49:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:49:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:49:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-06-27 16:49:27,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-27 16:49:27,360 INFO L175 Difference]: Start difference. First operand has 74 places, 93 transitions, 874 flow. Second operand 6 states and 70 transitions. [2024-06-27 16:49:27,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 114 transitions, 1180 flow [2024-06-27 16:49:27,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 1126 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 16:49:27,366 INFO L231 Difference]: Finished difference. Result has 75 places, 93 transitions, 880 flow [2024-06-27 16:49:27,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=880, PETRI_PLACES=75, PETRI_TRANSITIONS=93} [2024-06-27 16:49:27,366 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2024-06-27 16:49:27,366 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 93 transitions, 880 flow [2024-06-27 16:49:27,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2024-06-27 16:49:27,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:27,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:27,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 16:49:27,367 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:27,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:27,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1913229141, now seen corresponding path program 1 times [2024-06-27 16:49:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:27,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273294787] [2024-06-27 16:49:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:27,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:27,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:27,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273294787] [2024-06-27 16:49:27,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273294787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:27,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:27,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:49:27,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998939858] [2024-06-27 16:49:27,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:27,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:49:27,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:49:27,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:49:27,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 16:49:27,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 93 transitions, 880 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-06-27 16:49:27,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:27,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 16:49:27,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:27,512 INFO L124 PetriNetUnfolderBase]: 365/717 cut-off events. [2024-06-27 16:49:27,512 INFO L125 PetriNetUnfolderBase]: For 3103/3133 co-relation queries the response was YES. [2024-06-27 16:49:27,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 717 events. 365/717 cut-off events. For 3103/3133 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3595 event pairs, 162 based on Foata normal form. 25/732 useless extension candidates. Maximal degree in co-relation 2559. Up to 558 conditions per place. [2024-06-27 16:49:27,517 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 66 selfloop transitions, 2 changer transitions 15/109 dead transitions. [2024-06-27 16:49:27,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 1160 flow [2024-06-27 16:49:27,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:49:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:49:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-06-27 16:49:27,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-27 16:49:27,518 INFO L175 Difference]: Start difference. First operand has 75 places, 93 transitions, 880 flow. Second operand 5 states and 59 transitions. [2024-06-27 16:49:27,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 1160 flow [2024-06-27 16:49:27,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 1090 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 16:49:27,524 INFO L231 Difference]: Finished difference. Result has 77 places, 94 transitions, 841 flow [2024-06-27 16:49:27,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=77, PETRI_TRANSITIONS=94} [2024-06-27 16:49:27,525 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2024-06-27 16:49:27,525 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 94 transitions, 841 flow [2024-06-27 16:49:27,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-06-27 16:49:27,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:27,525 INFO L208 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] [2024-06-27 16:49:27,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 16:49:27,526 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:27,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:27,526 INFO L85 PathProgramCache]: Analyzing trace with hash -447768941, now seen corresponding path program 1 times [2024-06-27 16:49:27,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:27,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579862545] [2024-06-27 16:49:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:27,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:27,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:27,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579862545] [2024-06-27 16:49:27,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579862545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:49:27,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:49:27,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:49:27,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804561755] [2024-06-27 16:49:27,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:49:27,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:49:27,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:49:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:49:27,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 16:49:27,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 94 transitions, 841 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:27,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:27,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 16:49:27,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:27,658 INFO L124 PetriNetUnfolderBase]: 363/714 cut-off events. [2024-06-27 16:49:27,658 INFO L125 PetriNetUnfolderBase]: For 2596/2638 co-relation queries the response was YES. [2024-06-27 16:49:27,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 714 events. 363/714 cut-off events. For 2596/2638 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3571 event pairs, 162 based on Foata normal form. 25/731 useless extension candidates. Maximal degree in co-relation 2897. Up to 559 conditions per place. [2024-06-27 16:49:27,662 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 67 selfloop transitions, 2 changer transitions 11/106 dead transitions. [2024-06-27 16:49:27,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 1100 flow [2024-06-27 16:49:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:49:27,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:49:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2024-06-27 16:49:27,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 16:49:27,663 INFO L175 Difference]: Start difference. First operand has 77 places, 94 transitions, 841 flow. Second operand 4 states and 50 transitions. [2024-06-27 16:49:27,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 1100 flow [2024-06-27 16:49:27,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 1084 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 16:49:27,669 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 845 flow [2024-06-27 16:49:27,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=845, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2024-06-27 16:49:27,669 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2024-06-27 16:49:27,670 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 845 flow [2024-06-27 16:49:27,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:27,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:27,670 INFO L208 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] [2024-06-27 16:49:27,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 16:49:27,670 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:27,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:27,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2092765735, now seen corresponding path program 1 times [2024-06-27 16:49:27,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:27,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975893450] [2024-06-27 16:49:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:27,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:27,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975893450] [2024-06-27 16:49:27,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975893450] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:27,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892525886] [2024-06-27 16:49:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:27,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:27,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:27,825 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) [2024-06-27 16:49:27,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:49:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:27,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 16:49:27,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:27,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:27,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2024-06-27 16:49:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892525886] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:28,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:28,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-06-27 16:49:28,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747752230] [2024-06-27 16:49:28,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 16:49:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:28,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 16:49:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 16:49:28,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 16:49:28,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 845 flow. Second operand has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 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) [2024-06-27 16:49:28,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:28,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 16:49:28,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:28,321 INFO L124 PetriNetUnfolderBase]: 1072/1996 cut-off events. [2024-06-27 16:49:28,322 INFO L125 PetriNetUnfolderBase]: For 6743/6893 co-relation queries the response was YES. [2024-06-27 16:49:28,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7923 conditions, 1996 events. 1072/1996 cut-off events. For 6743/6893 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12018 event pairs, 143 based on Foata normal form. 54/2044 useless extension candidates. Maximal degree in co-relation 6496. Up to 521 conditions per place. [2024-06-27 16:49:28,343 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 225 selfloop transitions, 14 changer transitions 4/269 dead transitions. [2024-06-27 16:49:28,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 269 transitions, 2858 flow [2024-06-27 16:49:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:49:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:49:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-27 16:49:28,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-06-27 16:49:28,345 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 845 flow. Second operand 9 states and 125 transitions. [2024-06-27 16:49:28,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 269 transitions, 2858 flow [2024-06-27 16:49:28,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 269 transitions, 2842 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 16:49:28,358 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 954 flow [2024-06-27 16:49:28,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=954, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2024-06-27 16:49:28,358 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2024-06-27 16:49:28,359 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 954 flow [2024-06-27 16:49:28,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 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) [2024-06-27 16:49:28,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:28,359 INFO L208 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] [2024-06-27 16:49:28,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 16:49:28,571 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:28,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1625193775, now seen corresponding path program 2 times [2024-06-27 16:49:28,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:28,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319858159] [2024-06-27 16:49:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:28,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:28,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319858159] [2024-06-27 16:49:28,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319858159] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:28,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071094020] [2024-06-27 16:49:28,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:49:28,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:28,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:28,701 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) [2024-06-27 16:49:28,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:49:28,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:49:28,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:28,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 16:49:28,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:28,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:28,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2024-06-27 16:49:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:28,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071094020] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:28,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:28,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-06-27 16:49:28,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262929741] [2024-06-27 16:49:28,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:28,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 16:49:28,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 16:49:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 16:49:28,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 16:49:28,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 954 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 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) [2024-06-27 16:49:28,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:28,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 16:49:28,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:29,443 INFO L124 PetriNetUnfolderBase]: 2651/4950 cut-off events. [2024-06-27 16:49:29,444 INFO L125 PetriNetUnfolderBase]: For 18161/18453 co-relation queries the response was YES. [2024-06-27 16:49:29,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20662 conditions, 4950 events. 2651/4950 cut-off events. For 18161/18453 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35324 event pairs, 405 based on Foata normal form. 167/5109 useless extension candidates. Maximal degree in co-relation 15779. Up to 1606 conditions per place. [2024-06-27 16:49:29,472 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 224 selfloop transitions, 23 changer transitions 18/291 dead transitions. [2024-06-27 16:49:29,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 291 transitions, 3114 flow [2024-06-27 16:49:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:49:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:49:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-27 16:49:29,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-27 16:49:29,473 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 954 flow. Second operand 8 states and 114 transitions. [2024-06-27 16:49:29,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 291 transitions, 3114 flow [2024-06-27 16:49:29,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 291 transitions, 3066 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-27 16:49:29,511 INFO L231 Difference]: Finished difference. Result has 97 places, 126 transitions, 1142 flow [2024-06-27 16:49:29,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=97, PETRI_TRANSITIONS=126} [2024-06-27 16:49:29,512 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2024-06-27 16:49:29,512 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 126 transitions, 1142 flow [2024-06-27 16:49:29,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 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) [2024-06-27 16:49:29,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:29,512 INFO L208 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] [2024-06-27 16:49:29,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:29,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 16:49:29,724 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:29,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:29,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1808361791, now seen corresponding path program 3 times [2024-06-27 16:49:29,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:29,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974541830] [2024-06-27 16:49:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:29,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:29,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:29,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974541830] [2024-06-27 16:49:29,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974541830] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:29,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874603955] [2024-06-27 16:49:29,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:49:29,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:29,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:29,798 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) [2024-06-27 16:49:29,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:49:29,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:49:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:29,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:49:29,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:29,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:29,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874603955] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:29,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:29,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-06-27 16:49:29,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246331063] [2024-06-27 16:49:29,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:29,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:49:29,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:49:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:49:29,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:30,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 126 transitions, 1142 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2024-06-27 16:49:30,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:30,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:30,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:31,089 INFO L124 PetriNetUnfolderBase]: 4834/8047 cut-off events. [2024-06-27 16:49:31,089 INFO L125 PetriNetUnfolderBase]: For 23630/23630 co-relation queries the response was YES. [2024-06-27 16:49:31,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33461 conditions, 8047 events. 4834/8047 cut-off events. For 23630/23630 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 52076 event pairs, 183 based on Foata normal form. 240/8287 useless extension candidates. Maximal degree in co-relation 28087. Up to 1475 conditions per place. [2024-06-27 16:49:31,130 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 373 selfloop transitions, 123 changer transitions 8/505 dead transitions. [2024-06-27 16:49:31,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 505 transitions, 4865 flow [2024-06-27 16:49:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:49:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:49:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 287 transitions. [2024-06-27 16:49:31,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806366047745358 [2024-06-27 16:49:31,133 INFO L175 Difference]: Start difference. First operand has 97 places, 126 transitions, 1142 flow. Second operand 29 states and 287 transitions. [2024-06-27 16:49:31,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 505 transitions, 4865 flow [2024-06-27 16:49:31,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 505 transitions, 4814 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-27 16:49:31,185 INFO L231 Difference]: Finished difference. Result has 144 places, 204 transitions, 2209 flow [2024-06-27 16:49:31,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2209, PETRI_PLACES=144, PETRI_TRANSITIONS=204} [2024-06-27 16:49:31,186 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 118 predicate places. [2024-06-27 16:49:31,186 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 204 transitions, 2209 flow [2024-06-27 16:49:31,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2024-06-27 16:49:31,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:31,186 INFO L208 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] [2024-06-27 16:49:31,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:31,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:31,398 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:31,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1935508487, now seen corresponding path program 4 times [2024-06-27 16:49:31,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:31,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959760247] [2024-06-27 16:49:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:31,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:31,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959760247] [2024-06-27 16:49:31,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959760247] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123792569] [2024-06-27 16:49:31,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:49:31,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:31,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:31,483 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) [2024-06-27 16:49:31,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:49:31,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:49:31,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:31,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:49:31,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:31,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:31,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123792569] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:31,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:31,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-06-27 16:49:31,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238526639] [2024-06-27 16:49:31,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:31,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 16:49:31,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 16:49:31,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 16:49:31,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:31,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 204 transitions, 2209 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 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) [2024-06-27 16:49:31,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:31,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:31,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:33,406 INFO L124 PetriNetUnfolderBase]: 6736/11196 cut-off events. [2024-06-27 16:49:33,406 INFO L125 PetriNetUnfolderBase]: For 73665/73665 co-relation queries the response was YES. [2024-06-27 16:49:33,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58582 conditions, 11196 events. 6736/11196 cut-off events. For 73665/73665 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 75443 event pairs, 336 based on Foata normal form. 81/11277 useless extension candidates. Maximal degree in co-relation 56948. Up to 2360 conditions per place. [2024-06-27 16:49:33,473 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 270 selfloop transitions, 178 changer transitions 9/458 dead transitions. [2024-06-27 16:49:33,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 458 transitions, 5315 flow [2024-06-27 16:49:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:49:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:49:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2024-06-27 16:49:33,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38974358974358975 [2024-06-27 16:49:33,475 INFO L175 Difference]: Start difference. First operand has 144 places, 204 transitions, 2209 flow. Second operand 15 states and 152 transitions. [2024-06-27 16:49:33,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 458 transitions, 5315 flow [2024-06-27 16:49:33,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 458 transitions, 5035 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-06-27 16:49:33,913 INFO L231 Difference]: Finished difference. Result has 161 places, 284 transitions, 3400 flow [2024-06-27 16:49:33,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3400, PETRI_PLACES=161, PETRI_TRANSITIONS=284} [2024-06-27 16:49:33,914 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 135 predicate places. [2024-06-27 16:49:33,914 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 284 transitions, 3400 flow [2024-06-27 16:49:33,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 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) [2024-06-27 16:49:33,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:33,914 INFO L208 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] [2024-06-27 16:49:33,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:34,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:34,125 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:34,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:34,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1473023666, now seen corresponding path program 5 times [2024-06-27 16:49:34,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:34,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583811785] [2024-06-27 16:49:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:34,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:34,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583811785] [2024-06-27 16:49:34,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583811785] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306185966] [2024-06-27 16:49:34,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:49:34,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:34,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:34,208 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) [2024-06-27 16:49:34,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:49:34,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:49:34,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:34,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:49:34,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:34,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:34,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306185966] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:34,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:34,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-06-27 16:49:34,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90603287] [2024-06-27 16:49:34,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:34,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 16:49:34,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 16:49:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 16:49:34,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:34,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 284 transitions, 3400 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 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) [2024-06-27 16:49:34,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:34,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:34,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:36,365 INFO L124 PetriNetUnfolderBase]: 7479/12457 cut-off events. [2024-06-27 16:49:36,365 INFO L125 PetriNetUnfolderBase]: For 111224/111224 co-relation queries the response was YES. [2024-06-27 16:49:36,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70728 conditions, 12457 events. 7479/12457 cut-off events. For 111224/111224 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 85664 event pairs, 1940 based on Foata normal form. 9/12466 useless extension candidates. Maximal degree in co-relation 68873. Up to 7773 conditions per place. [2024-06-27 16:49:36,456 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 335 selfloop transitions, 45 changer transitions 17/398 dead transitions. [2024-06-27 16:49:36,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 398 transitions, 5262 flow [2024-06-27 16:49:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:49:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:49:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-27 16:49:36,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-27 16:49:36,458 INFO L175 Difference]: Start difference. First operand has 161 places, 284 transitions, 3400 flow. Second operand 7 states and 86 transitions. [2024-06-27 16:49:36,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 398 transitions, 5262 flow [2024-06-27 16:49:37,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 398 transitions, 5160 flow, removed 51 selfloop flow, removed 0 redundant places. [2024-06-27 16:49:37,386 INFO L231 Difference]: Finished difference. Result has 170 places, 293 transitions, 3531 flow [2024-06-27 16:49:37,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3531, PETRI_PLACES=170, PETRI_TRANSITIONS=293} [2024-06-27 16:49:37,387 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2024-06-27 16:49:37,387 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 293 transitions, 3531 flow [2024-06-27 16:49:37,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 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) [2024-06-27 16:49:37,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:37,388 INFO L208 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] [2024-06-27 16:49:37,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:37,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:37,601 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:37,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:37,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1388022526, now seen corresponding path program 6 times [2024-06-27 16:49:37,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:37,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854900053] [2024-06-27 16:49:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:37,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:37,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:37,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854900053] [2024-06-27 16:49:37,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854900053] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:37,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152441535] [2024-06-27 16:49:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:49:37,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:37,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:37,700 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) [2024-06-27 16:49:37,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:49:37,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:49:37,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:37,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:49:37,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:37,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:37,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152441535] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:37,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:37,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-06-27 16:49:37,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655311463] [2024-06-27 16:49:37,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:37,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 16:49:37,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:37,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 16:49:37,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-27 16:49:37,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:37,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 293 transitions, 3531 flow. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 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) [2024-06-27 16:49:37,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:37,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:37,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:40,254 INFO L124 PetriNetUnfolderBase]: 9297/15237 cut-off events. [2024-06-27 16:49:40,255 INFO L125 PetriNetUnfolderBase]: For 140757/140757 co-relation queries the response was YES. [2024-06-27 16:49:40,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87972 conditions, 15237 events. 9297/15237 cut-off events. For 140757/140757 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 105516 event pairs, 1198 based on Foata normal form. 166/15403 useless extension candidates. Maximal degree in co-relation 87256. Up to 5286 conditions per place. [2024-06-27 16:49:40,454 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 490 selfloop transitions, 166 changer transitions 3/660 dead transitions. [2024-06-27 16:49:40,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 660 transitions, 8193 flow [2024-06-27 16:49:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:49:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:49:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 230 transitions. [2024-06-27 16:49:40,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4020979020979021 [2024-06-27 16:49:40,459 INFO L175 Difference]: Start difference. First operand has 170 places, 293 transitions, 3531 flow. Second operand 22 states and 230 transitions. [2024-06-27 16:49:40,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 660 transitions, 8193 flow [2024-06-27 16:49:41,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 660 transitions, 8098 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 16:49:41,803 INFO L231 Difference]: Finished difference. Result has 196 places, 366 transitions, 5156 flow [2024-06-27 16:49:41,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5156, PETRI_PLACES=196, PETRI_TRANSITIONS=366} [2024-06-27 16:49:41,804 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 170 predicate places. [2024-06-27 16:49:41,804 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 366 transitions, 5156 flow [2024-06-27 16:49:41,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 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) [2024-06-27 16:49:41,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:41,804 INFO L208 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] [2024-06-27 16:49:41,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:42,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:42,016 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:42,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1312729564, now seen corresponding path program 7 times [2024-06-27 16:49:42,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:42,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451783052] [2024-06-27 16:49:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:42,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:42,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:42,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451783052] [2024-06-27 16:49:42,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451783052] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:42,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860176461] [2024-06-27 16:49:42,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:49:42,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:42,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:42,109 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) [2024-06-27 16:49:42,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:49:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:42,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:49:42,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:42,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:42,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860176461] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:42,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:42,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-06-27 16:49:42,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456753678] [2024-06-27 16:49:42,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:42,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:49:42,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:42,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:49:42,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:49:42,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:42,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 366 transitions, 5156 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2024-06-27 16:49:42,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:42,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:42,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:44,947 INFO L124 PetriNetUnfolderBase]: 9369/15390 cut-off events. [2024-06-27 16:49:44,947 INFO L125 PetriNetUnfolderBase]: For 182273/182273 co-relation queries the response was YES. [2024-06-27 16:49:45,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97996 conditions, 15390 events. 9369/15390 cut-off events. For 182273/182273 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 107153 event pairs, 2488 based on Foata normal form. 30/15420 useless extension candidates. Maximal degree in co-relation 97230. Up to 10466 conditions per place. [2024-06-27 16:49:45,089 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 423 selfloop transitions, 77 changer transitions 16/517 dead transitions. [2024-06-27 16:49:45,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 517 transitions, 7425 flow [2024-06-27 16:49:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:49:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:49:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-27 16:49:45,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43006993006993005 [2024-06-27 16:49:45,092 INFO L175 Difference]: Start difference. First operand has 196 places, 366 transitions, 5156 flow. Second operand 11 states and 123 transitions. [2024-06-27 16:49:45,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 517 transitions, 7425 flow [2024-06-27 16:49:47,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 517 transitions, 6779 flow, removed 230 selfloop flow, removed 7 redundant places. [2024-06-27 16:49:47,445 INFO L231 Difference]: Finished difference. Result has 202 places, 360 transitions, 4605 flow [2024-06-27 16:49:47,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4605, PETRI_PLACES=202, PETRI_TRANSITIONS=360} [2024-06-27 16:49:47,446 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 176 predicate places. [2024-06-27 16:49:47,447 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 360 transitions, 4605 flow [2024-06-27 16:49:47,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2024-06-27 16:49:47,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:47,447 INFO L208 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] [2024-06-27 16:49:47,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:47,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-06-27 16:49:47,658 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:47,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:47,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1629265695, now seen corresponding path program 8 times [2024-06-27 16:49:47,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:47,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830769044] [2024-06-27 16:49:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:47,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:47,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:47,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830769044] [2024-06-27 16:49:47,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830769044] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:47,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575019776] [2024-06-27 16:49:47,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:49:47,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:47,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:47,753 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) [2024-06-27 16:49:47,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:49:47,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:49:47,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:47,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:49:47,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:47,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:47,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575019776] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:47,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:47,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-06-27 16:49:47,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900877865] [2024-06-27 16:49:47,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:47,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:49:47,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:49:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:49:47,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:47,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 360 transitions, 4605 flow. Second operand has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 13 states have internal predecessors, (89), 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) [2024-06-27 16:49:47,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:47,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:47,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:51,369 INFO L124 PetriNetUnfolderBase]: 11627/19115 cut-off events. [2024-06-27 16:49:51,369 INFO L125 PetriNetUnfolderBase]: For 174211/174211 co-relation queries the response was YES. [2024-06-27 16:49:51,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111290 conditions, 19115 events. 11627/19115 cut-off events. For 174211/174211 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 136677 event pairs, 502 based on Foata normal form. 226/19341 useless extension candidates. Maximal degree in co-relation 110546. Up to 5896 conditions per place. [2024-06-27 16:49:51,539 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 362 selfloop transitions, 275 changer transitions 6/644 dead transitions. [2024-06-27 16:49:51,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 644 transitions, 8532 flow [2024-06-27 16:49:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:49:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:49:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 168 transitions. [2024-06-27 16:49:51,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-27 16:49:51,540 INFO L175 Difference]: Start difference. First operand has 202 places, 360 transitions, 4605 flow. Second operand 16 states and 168 transitions. [2024-06-27 16:49:51,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 644 transitions, 8532 flow [2024-06-27 16:49:53,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 644 transitions, 8247 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 16:49:53,495 INFO L231 Difference]: Finished difference. Result has 219 places, 444 transitions, 6397 flow [2024-06-27 16:49:53,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6397, PETRI_PLACES=219, PETRI_TRANSITIONS=444} [2024-06-27 16:49:53,496 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 193 predicate places. [2024-06-27 16:49:53,496 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 444 transitions, 6397 flow [2024-06-27 16:49:53,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 13 states have internal predecessors, (89), 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) [2024-06-27 16:49:53,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:53,496 INFO L208 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] [2024-06-27 16:49:53,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:53,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-06-27 16:49:53,708 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:53,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:53,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1085553406, now seen corresponding path program 9 times [2024-06-27 16:49:53,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:53,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851460509] [2024-06-27 16:49:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:53,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:53,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:53,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851460509] [2024-06-27 16:49:53,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851460509] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:53,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162035965] [2024-06-27 16:49:53,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:49:53,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:53,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:53,778 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) [2024-06-27 16:49:53,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:49:53,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:49:53,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:53,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:49:53,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:53,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:49:53,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162035965] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:53,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:53,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-06-27 16:49:53,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976876344] [2024-06-27 16:49:53,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:53,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 16:49:53,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:53,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 16:49:53,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 16:49:53,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:49:53,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 444 transitions, 6397 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:53,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:53,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:49:53,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:57,585 INFO L124 PetriNetUnfolderBase]: 11599/19072 cut-off events. [2024-06-27 16:49:57,585 INFO L125 PetriNetUnfolderBase]: For 241007/241007 co-relation queries the response was YES. [2024-06-27 16:49:57,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123859 conditions, 19072 events. 11599/19072 cut-off events. For 241007/241007 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 136699 event pairs, 2905 based on Foata normal form. 51/19123 useless extension candidates. Maximal degree in co-relation 123095. Up to 11654 conditions per place. [2024-06-27 16:49:57,782 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 525 selfloop transitions, 107 changer transitions 4/637 dead transitions. [2024-06-27 16:49:57,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 637 transitions, 9331 flow [2024-06-27 16:49:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:49:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:49:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-27 16:49:57,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-06-27 16:49:57,783 INFO L175 Difference]: Start difference. First operand has 219 places, 444 transitions, 6397 flow. Second operand 12 states and 137 transitions. [2024-06-27 16:49:57,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 637 transitions, 9331 flow [2024-06-27 16:50:01,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 637 transitions, 9188 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 16:50:01,164 INFO L231 Difference]: Finished difference. Result has 223 places, 440 transitions, 6446 flow [2024-06-27 16:50:01,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6446, PETRI_PLACES=223, PETRI_TRANSITIONS=440} [2024-06-27 16:50:01,173 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 197 predicate places. [2024-06-27 16:50:01,173 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 440 transitions, 6446 flow [2024-06-27 16:50:01,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:01,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:01,174 INFO L208 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] [2024-06-27 16:50:01,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:01,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-27 16:50:01,392 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:01,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:01,394 INFO L85 PathProgramCache]: Analyzing trace with hash 49892430, now seen corresponding path program 10 times [2024-06-27 16:50:01,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:01,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263787007] [2024-06-27 16:50:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:01,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:50:01,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:01,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263787007] [2024-06-27 16:50:01,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263787007] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:01,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492287911] [2024-06-27 16:50:01,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:50:01,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:01,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:01,457 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) [2024-06-27 16:50:01,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:50:01,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:50:01,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:01,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:50:01,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:50:01,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:50:01,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492287911] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:01,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:01,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-06-27 16:50:01,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349165271] [2024-06-27 16:50:01,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:01,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:50:01,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:01,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:50:01,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:50:01,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:50:01,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 440 transitions, 6446 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:01,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:01,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:50:01,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:05,823 INFO L124 PetriNetUnfolderBase]: 12893/21080 cut-off events. [2024-06-27 16:50:05,824 INFO L125 PetriNetUnfolderBase]: For 288914/288914 co-relation queries the response was YES. [2024-06-27 16:50:05,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140470 conditions, 21080 events. 12893/21080 cut-off events. For 288914/288914 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 151572 event pairs, 1397 based on Foata normal form. 66/21146 useless extension candidates. Maximal degree in co-relation 139701. Up to 13052 conditions per place. [2024-06-27 16:50:06,026 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 564 selfloop transitions, 122 changer transitions 10/697 dead transitions. [2024-06-27 16:50:06,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 697 transitions, 10275 flow [2024-06-27 16:50:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:50:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:50:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2024-06-27 16:50:06,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-27 16:50:06,027 INFO L175 Difference]: Start difference. First operand has 223 places, 440 transitions, 6446 flow. Second operand 14 states and 160 transitions. [2024-06-27 16:50:06,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 697 transitions, 10275 flow [2024-06-27 16:50:10,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 697 transitions, 9994 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-27 16:50:10,455 INFO L231 Difference]: Finished difference. Result has 230 places, 468 transitions, 7043 flow [2024-06-27 16:50:10,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6189, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7043, PETRI_PLACES=230, PETRI_TRANSITIONS=468} [2024-06-27 16:50:10,456 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 204 predicate places. [2024-06-27 16:50:10,456 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 468 transitions, 7043 flow [2024-06-27 16:50:10,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:10,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:10,456 INFO L208 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] [2024-06-27 16:50:10,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-06-27 16:50:10,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 16:50:10,668 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:10,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash -213240680, now seen corresponding path program 11 times [2024-06-27 16:50:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:10,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322578791] [2024-06-27 16:50:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:10,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:50:10,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:10,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322578791] [2024-06-27 16:50:10,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322578791] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:10,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080923064] [2024-06-27 16:50:10,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:50:10,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:10,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:10,763 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) [2024-06-27 16:50:10,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:50:10,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:50:10,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:10,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:50:10,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:50:10,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:50:10,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080923064] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:10,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:10,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-06-27 16:50:10,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445541366] [2024-06-27 16:50:10,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:10,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:50:10,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:50:10,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:50:10,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:50:10,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 468 transitions, 7043 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:10,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:10,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:50:10,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:15,142 INFO L124 PetriNetUnfolderBase]: 13075/21372 cut-off events. [2024-06-27 16:50:15,142 INFO L125 PetriNetUnfolderBase]: For 297415/297415 co-relation queries the response was YES. [2024-06-27 16:50:15,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143852 conditions, 21372 events. 13075/21372 cut-off events. For 297415/297415 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 154227 event pairs, 545 based on Foata normal form. 116/21488 useless extension candidates. Maximal degree in co-relation 143084. Up to 6612 conditions per place. [2024-06-27 16:50:15,533 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 570 selfloop transitions, 246 changer transitions 4/821 dead transitions. [2024-06-27 16:50:15,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 821 transitions, 11918 flow [2024-06-27 16:50:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:50:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:50:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 254 transitions. [2024-06-27 16:50:15,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757396449704142 [2024-06-27 16:50:15,540 INFO L175 Difference]: Start difference. First operand has 230 places, 468 transitions, 7043 flow. Second operand 26 states and 254 transitions. [2024-06-27 16:50:15,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 821 transitions, 11918 flow [2024-06-27 16:50:19,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 821 transitions, 11655 flow, removed 127 selfloop flow, removed 1 redundant places. [2024-06-27 16:50:19,981 INFO L231 Difference]: Finished difference. Result has 264 places, 501 transitions, 7950 flow [2024-06-27 16:50:19,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6782, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7950, PETRI_PLACES=264, PETRI_TRANSITIONS=501} [2024-06-27 16:50:19,982 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 238 predicate places. [2024-06-27 16:50:19,982 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 501 transitions, 7950 flow [2024-06-27 16:50:19,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:19,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:19,983 INFO L208 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] [2024-06-27 16:50:19,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:20,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-27 16:50:20,194 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:50:20,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:20,194 INFO L85 PathProgramCache]: Analyzing trace with hash 543451522, now seen corresponding path program 12 times [2024-06-27 16:50:20,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:20,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081918450] [2024-06-27 16:50:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:20,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:50:20,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081918450] [2024-06-27 16:50:20,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081918450] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219753208] [2024-06-27 16:50:20,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:50:20,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:20,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:20,277 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) [2024-06-27 16:50:20,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:50:20,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:50:20,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:20,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:50:20,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:50:20,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:50:20,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219753208] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:20,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:20,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-06-27 16:50:20,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57298004] [2024-06-27 16:50:20,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:20,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:50:20,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:20,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:50:20,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:50:20,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:50:20,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 501 transitions, 7950 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 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) [2024-06-27 16:50:20,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:20,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:50:20,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:25,999 INFO L124 PetriNetUnfolderBase]: 15105/24590 cut-off events. [2024-06-27 16:50:25,999 INFO L125 PetriNetUnfolderBase]: For 343365/343365 co-relation queries the response was YES. [2024-06-27 16:50:26,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172409 conditions, 24590 events. 15105/24590 cut-off events. For 343365/343365 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 180150 event pairs, 670 based on Foata normal form. 92/24682 useless extension candidates. Maximal degree in co-relation 171601. Up to 7718 conditions per place. [2024-06-27 16:50:26,282 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 592 selfloop transitions, 297 changer transitions 8/898 dead transitions. [2024-06-27 16:50:26,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 898 transitions, 13804 flow [2024-06-27 16:50:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:50:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:50:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 275 transitions. [2024-06-27 16:50:26,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3647214854111406 [2024-06-27 16:50:26,284 INFO L175 Difference]: Start difference. First operand has 264 places, 501 transitions, 7950 flow. Second operand 29 states and 275 transitions. [2024-06-27 16:50:26,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 898 transitions, 13804 flow