./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.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-prod-cons.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 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:02:58,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:02:58,092 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:02:58,095 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:02:58,095 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:02:58,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:02:58,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:02:58,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:02:58,109 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:02:58,110 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:02:58,110 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:02:58,110 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:02:58,111 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:02:58,111 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:02:58,111 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:02:58,112 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:02:58,112 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:02:58,112 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:02:58,112 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:02:58,113 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:02:58,113 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:02:58,124 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:02:58,124 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:02:58,125 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:02:58,125 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:02:58,125 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:02:58,125 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:02:58,126 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:02:58,126 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:02:58,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:02:58,126 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:02:58,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:02:58,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:02:58,127 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:02:58,127 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:02:58,127 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:02:58,128 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:02:58,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:02:58,128 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:02:58,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:02:58,129 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:02:58,129 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:02:58,129 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:02:58,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2024-06-27 17:02:58,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:02:58,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:02:58,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:02:58,337 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:02:58,337 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:02:58,338 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2024-06-27 17:02:59,432 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:02:59,620 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:02:59,620 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2024-06-27 17:02:59,626 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337da3667/7a0b29f509474459928597ddc6964b4f/FLAGa93fad62b [2024-06-27 17:02:59,636 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337da3667/7a0b29f509474459928597ddc6964b4f [2024-06-27 17:02:59,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:02:59,639 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:02:59,640 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:02:59,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:02:59,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:02:59,644 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,645 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a819c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59, skipping insertion in model container [2024-06-27 17:02:59,645 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,661 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:02:59,781 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-prod-cons.wvr.c[3095,3108] [2024-06-27 17:02:59,787 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:02:59,794 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:02:59,808 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-prod-cons.wvr.c[3095,3108] [2024-06-27 17:02:59,811 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:02:59,824 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:02:59,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59 WrapperNode [2024-06-27 17:02:59,825 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:02:59,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:02:59,826 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:02:59,826 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:02:59,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,837 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,854 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 156 [2024-06-27 17:02:59,855 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:02:59,855 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:02:59,855 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:02:59,855 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:02:59,864 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,866 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,877 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 17:02:59,877 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,877 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,881 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,884 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,885 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,886 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,887 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:02:59,888 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:02:59,888 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:02:59,888 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:02:59,889 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (1/1) ... [2024-06-27 17:02:59,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:02:59,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:59,930 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 17:02:59,932 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 17:02:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:02:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:02:59,968 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:02:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:02:59,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:02:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 17:02:59,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 17:02:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:02:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:02:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:02:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:02:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:02:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:02:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:02:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:02:59,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:02:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:02:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:02:59,971 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 17:03:00,058 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:03:00,074 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:03:00,300 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:03:00,301 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:03:00,434 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:03:00,434 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 17:03:00,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:03:00 BoogieIcfgContainer [2024-06-27 17:03:00,435 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:03:00,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:03:00,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:03:00,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:03:00,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:02:59" (1/3) ... [2024-06-27 17:03:00,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298990c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:03:00, skipping insertion in model container [2024-06-27 17:03:00,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:02:59" (2/3) ... [2024-06-27 17:03:00,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298990c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:03:00, skipping insertion in model container [2024-06-27 17:03:00,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:03:00" (3/3) ... [2024-06-27 17:03:00,440 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-06-27 17:03:00,446 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:03:00,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:03:00,453 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:03:00,453 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:03:00,493 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 17:03:00,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 37 transitions, 95 flow [2024-06-27 17:03:00,545 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-06-27 17:03:00,545 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 17:03:00,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 34 events. 4/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-06-27 17:03:00,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 37 transitions, 95 flow [2024-06-27 17:03:00,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 33 transitions, 84 flow [2024-06-27 17:03:00,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:03:00,562 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;@34438686, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:03:00,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 17:03:00,577 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:03:00,577 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-06-27 17:03:00,577 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 17:03:00,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:00,578 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 17:03:00,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:00,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:00,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1998691310, now seen corresponding path program 1 times [2024-06-27 17:03:00,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:00,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699865571] [2024-06-27 17:03:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:00,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:01,048 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 17:03:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699865571] [2024-06-27 17:03:01,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699865571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:03:01,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:03:01,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:03:01,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328472093] [2024-06-27 17:03:01,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:03:01,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:03:01,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:03:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:03:01,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-06-27 17:03:01,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:01,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:01,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-06-27 17:03:01,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:01,301 INFO L124 PetriNetUnfolderBase]: 817/1325 cut-off events. [2024-06-27 17:03:01,301 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-06-27 17:03:01,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2664 conditions, 1325 events. 817/1325 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6297 event pairs, 142 based on Foata normal form. 86/1393 useless extension candidates. Maximal degree in co-relation 2448. Up to 409 conditions per place. [2024-06-27 17:03:01,310 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 56 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2024-06-27 17:03:01,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 291 flow [2024-06-27 17:03:01,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:03:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:03:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 17:03:01,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540540540540541 [2024-06-27 17:03:01,321 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 84 flow. Second operand 6 states and 123 transitions. [2024-06-27 17:03:01,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 291 flow [2024-06-27 17:03:01,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 68 transitions, 269 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:03:01,326 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 98 flow [2024-06-27 17:03:01,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-06-27 17:03:01,330 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-06-27 17:03:01,330 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 98 flow [2024-06-27 17:03:01,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:01,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:01,330 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, 1, 1, 1] [2024-06-27 17:03:01,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:03:01,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:01,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2001054055, now seen corresponding path program 1 times [2024-06-27 17:03:01,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:01,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586809009] [2024-06-27 17:03:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:01,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:01,386 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 17:03:01,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:01,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586809009] [2024-06-27 17:03:01,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586809009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:03:01,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:03:01,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:03:01,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943309751] [2024-06-27 17:03:01,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:03:01,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:03:01,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:01,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:03:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:03:01,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-06-27 17:03:01,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:01,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:01,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-06-27 17:03:01,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:01,477 INFO L124 PetriNetUnfolderBase]: 404/802 cut-off events. [2024-06-27 17:03:01,477 INFO L125 PetriNetUnfolderBase]: For 224/287 co-relation queries the response was YES. [2024-06-27 17:03:01,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 802 events. 404/802 cut-off events. For 224/287 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3921 event pairs, 165 based on Foata normal form. 67/825 useless extension candidates. Maximal degree in co-relation 699. Up to 446 conditions per place. [2024-06-27 17:03:01,480 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 27 selfloop transitions, 2 changer transitions 4/46 dead transitions. [2024-06-27 17:03:01,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 189 flow [2024-06-27 17:03:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:03:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:03:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-27 17:03:01,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6846846846846847 [2024-06-27 17:03:01,482 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 98 flow. Second operand 3 states and 76 transitions. [2024-06-27 17:03:01,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 189 flow [2024-06-27 17:03:01,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 183 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:03:01,484 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 104 flow [2024-06-27 17:03:01,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-06-27 17:03:01,485 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-06-27 17:03:01,485 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 104 flow [2024-06-27 17:03:01,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:01,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:01,485 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:01,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:03:01,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:01,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1423229035, now seen corresponding path program 1 times [2024-06-27 17:03:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:01,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950163088] [2024-06-27 17:03:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:01,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:01,548 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 17:03:01,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:01,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950163088] [2024-06-27 17:03:01,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950163088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:03:01,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:03:01,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:03:01,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976436424] [2024-06-27 17:03:01,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:03:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:03:01,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:03:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:03:01,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-06-27 17:03:01,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 17:03:01,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:01,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-06-27 17:03:01,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:01,636 INFO L124 PetriNetUnfolderBase]: 465/920 cut-off events. [2024-06-27 17:03:01,636 INFO L125 PetriNetUnfolderBase]: For 370/488 co-relation queries the response was YES. [2024-06-27 17:03:01,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 920 events. 465/920 cut-off events. For 370/488 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4993 event pairs, 390 based on Foata normal form. 95/900 useless extension candidates. Maximal degree in co-relation 1163. Up to 580 conditions per place. [2024-06-27 17:03:01,641 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 2 changer transitions 13/50 dead transitions. [2024-06-27 17:03:01,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 210 flow [2024-06-27 17:03:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:03:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:03:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-27 17:03:01,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6283783783783784 [2024-06-27 17:03:01,646 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 104 flow. Second operand 4 states and 93 transitions. [2024-06-27 17:03:01,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 210 flow [2024-06-27 17:03:01,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:03:01,649 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 116 flow [2024-06-27 17:03:01,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 17:03:01,650 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2024-06-27 17:03:01,650 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 116 flow [2024-06-27 17:03:01,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 17:03:01,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:01,650 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:01,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:03:01,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:01,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2029834975, now seen corresponding path program 1 times [2024-06-27 17:03:01,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:01,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725236986] [2024-06-27 17:03:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:01,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:02,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:02,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725236986] [2024-06-27 17:03:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725236986] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:02,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615975225] [2024-06-27 17:03:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:02,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:02,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:02,237 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 17:03:02,282 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 17:03:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:02,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:03:02,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:02,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:03:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:02,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:03,174 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 40 treesize of output 36 [2024-06-27 17:03:03,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:03:03,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2024-06-27 17:03:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:03,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615975225] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:03,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:03,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2024-06-27 17:03:03,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427416709] [2024-06-27 17:03:03,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:03,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 17:03:03,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 17:03:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2024-06-27 17:03:03,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 37 [2024-06-27 17:03:03,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 116 flow. Second operand has 32 states, 32 states have (on average 8.53125) internal successors, (273), 32 states have internal predecessors, (273), 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 17:03:03,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:03,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 37 [2024-06-27 17:03:03,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:08,658 INFO L124 PetriNetUnfolderBase]: 7637/12383 cut-off events. [2024-06-27 17:03:08,659 INFO L125 PetriNetUnfolderBase]: For 3969/3969 co-relation queries the response was YES. [2024-06-27 17:03:08,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28244 conditions, 12383 events. 7637/12383 cut-off events. For 3969/3969 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 79778 event pairs, 545 based on Foata normal form. 176/11749 useless extension candidates. Maximal degree in co-relation 28228. Up to 1495 conditions per place. [2024-06-27 17:03:08,696 INFO L140 encePairwiseOnDemand]: 19/37 looper letters, 353 selfloop transitions, 109 changer transitions 354/819 dead transitions. [2024-06-27 17:03:08,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 819 transitions, 3840 flow [2024-06-27 17:03:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-06-27 17:03:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2024-06-27 17:03:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 1342 transitions. [2024-06-27 17:03:08,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-06-27 17:03:08,702 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 116 flow. Second operand 88 states and 1342 transitions. [2024-06-27 17:03:08,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 819 transitions, 3840 flow [2024-06-27 17:03:08,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 819 transitions, 3808 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 17:03:08,719 INFO L231 Difference]: Finished difference. Result has 174 places, 158 transitions, 1040 flow [2024-06-27 17:03:08,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=1040, PETRI_PLACES=174, PETRI_TRANSITIONS=158} [2024-06-27 17:03:08,721 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 135 predicate places. [2024-06-27 17:03:08,721 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 158 transitions, 1040 flow [2024-06-27 17:03:08,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.53125) internal successors, (273), 32 states have internal predecessors, (273), 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 17:03:08,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:08,722 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:08,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:03:08,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:08,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:08,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:08,935 INFO L85 PathProgramCache]: Analyzing trace with hash -431517481, now seen corresponding path program 2 times [2024-06-27 17:03:08,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:08,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196442773] [2024-06-27 17:03:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:08,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:09,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:09,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196442773] [2024-06-27 17:03:09,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196442773] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:09,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455855315] [2024-06-27 17:03:09,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:03:09,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:09,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:09,845 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 17:03:09,872 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 17:03:09,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:03:09,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:09,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-27 17:03:09,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:03:10,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:10,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:03:10,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 17:03:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 17:03:10,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455855315] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:10,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:10,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 35 [2024-06-27 17:03:10,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878403622] [2024-06-27 17:03:10,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:10,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 17:03:10,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:10,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 17:03:10,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 17:03:10,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 37 [2024-06-27 17:03:10,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 158 transitions, 1040 flow. Second operand has 36 states, 36 states have (on average 7.5) internal successors, (270), 36 states have internal predecessors, (270), 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 17:03:10,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:10,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 37 [2024-06-27 17:03:10,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:13,225 INFO L124 PetriNetUnfolderBase]: 5047/7882 cut-off events. [2024-06-27 17:03:13,225 INFO L125 PetriNetUnfolderBase]: For 169510/169510 co-relation queries the response was YES. [2024-06-27 17:03:13,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40658 conditions, 7882 events. 5047/7882 cut-off events. For 169510/169510 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 41546 event pairs, 156 based on Foata normal form. 106/7986 useless extension candidates. Maximal degree in co-relation 38520. Up to 1682 conditions per place. [2024-06-27 17:03:13,286 INFO L140 encePairwiseOnDemand]: 19/37 looper letters, 236 selfloop transitions, 190 changer transitions 60/488 dead transitions. [2024-06-27 17:03:13,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 488 transitions, 4703 flow [2024-06-27 17:03:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 17:03:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 17:03:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 518 transitions. [2024-06-27 17:03:13,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-06-27 17:03:13,291 INFO L175 Difference]: Start difference. First operand has 174 places, 158 transitions, 1040 flow. Second operand 39 states and 518 transitions. [2024-06-27 17:03:13,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 488 transitions, 4703 flow [2024-06-27 17:03:13,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 488 transitions, 3694 flow, removed 485 selfloop flow, removed 23 redundant places. [2024-06-27 17:03:13,610 INFO L231 Difference]: Finished difference. Result has 179 places, 236 transitions, 2206 flow [2024-06-27 17:03:13,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2206, PETRI_PLACES=179, PETRI_TRANSITIONS=236} [2024-06-27 17:03:13,611 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 140 predicate places. [2024-06-27 17:03:13,611 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 236 transitions, 2206 flow [2024-06-27 17:03:13,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.5) internal successors, (270), 36 states have internal predecessors, (270), 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 17:03:13,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:13,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:13,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 17:03:13,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:13,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:13,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1159622672, now seen corresponding path program 3 times [2024-06-27 17:03:13,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:13,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067935324] [2024-06-27 17:03:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:03:13,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:13,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067935324] [2024-06-27 17:03:13,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067935324] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:13,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68007119] [2024-06-27 17:03:13,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:03:13,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:13,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:13,889 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 17:03:13,930 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 17:03:13,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:03:13,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:13,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:03:13,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:03:14,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:03:14,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68007119] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:14,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:14,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-06-27 17:03:14,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374487103] [2024-06-27 17:03:14,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:14,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:03:14,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:14,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:03:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:03:14,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-06-27 17:03:14,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 236 transitions, 2206 flow. Second operand has 11 states, 11 states have (on average 18.181818181818183) internal successors, (200), 11 states have internal predecessors, (200), 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 17:03:14,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:14,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-06-27 17:03:14,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:15,075 INFO L124 PetriNetUnfolderBase]: 2955/6063 cut-off events. [2024-06-27 17:03:15,076 INFO L125 PetriNetUnfolderBase]: For 115352/116033 co-relation queries the response was YES. [2024-06-27 17:03:15,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34006 conditions, 6063 events. 2955/6063 cut-off events. For 115352/116033 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 43861 event pairs, 601 based on Foata normal form. 330/6068 useless extension candidates. Maximal degree in co-relation 31637. Up to 1378 conditions per place. [2024-06-27 17:03:15,164 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 138 selfloop transitions, 25 changer transitions 113/370 dead transitions. [2024-06-27 17:03:15,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 370 transitions, 3786 flow [2024-06-27 17:03:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:03:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:03:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-27 17:03:15,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-06-27 17:03:15,168 INFO L175 Difference]: Start difference. First operand has 179 places, 236 transitions, 2206 flow. Second operand 11 states and 264 transitions. [2024-06-27 17:03:15,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 370 transitions, 3786 flow [2024-06-27 17:03:15,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 370 transitions, 3293 flow, removed 170 selfloop flow, removed 10 redundant places. [2024-06-27 17:03:15,768 INFO L231 Difference]: Finished difference. Result has 180 places, 195 transitions, 1657 flow [2024-06-27 17:03:15,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1657, PETRI_PLACES=180, PETRI_TRANSITIONS=195} [2024-06-27 17:03:15,769 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 141 predicate places. [2024-06-27 17:03:15,769 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 195 transitions, 1657 flow [2024-06-27 17:03:15,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.181818181818183) internal successors, (200), 11 states have internal predecessors, (200), 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 17:03:15,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:15,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:15,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 17:03:15,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:15,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:15,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash 858753038, now seen corresponding path program 4 times [2024-06-27 17:03:15,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:15,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393098690] [2024-06-27 17:03:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:16,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:16,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393098690] [2024-06-27 17:03:16,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393098690] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:16,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53649974] [2024-06-27 17:03:16,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:03:16,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:16,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:16,871 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 17:03:16,887 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 17:03:16,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:03:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:16,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 17:03:16,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:17,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:03:17,667 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-06-27 17:03:17,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2024-06-27 17:03:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:17,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:18,715 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 76 treesize of output 68 [2024-06-27 17:03:18,756 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 17:03:18,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 135 [2024-06-27 17:03:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:19,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53649974] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:19,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:19,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 46 [2024-06-27 17:03:19,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277662917] [2024-06-27 17:03:19,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:19,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-06-27 17:03:19,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-06-27 17:03:19,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2024-06-27 17:03:19,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 37 [2024-06-27 17:03:19,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 195 transitions, 1657 flow. Second operand has 47 states, 47 states have (on average 8.425531914893616) internal successors, (396), 47 states have internal predecessors, (396), 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 17:03:19,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:19,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 37 [2024-06-27 17:03:19,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:37,759 INFO L124 PetriNetUnfolderBase]: 21808/35243 cut-off events. [2024-06-27 17:03:37,759 INFO L125 PetriNetUnfolderBase]: For 469787/469787 co-relation queries the response was YES. [2024-06-27 17:03:38,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181049 conditions, 35243 events. 21808/35243 cut-off events. For 469787/469787 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 245884 event pairs, 2298 based on Foata normal form. 550/35691 useless extension candidates. Maximal degree in co-relation 176482. Up to 6578 conditions per place. [2024-06-27 17:03:38,216 INFO L140 encePairwiseOnDemand]: 18/37 looper letters, 890 selfloop transitions, 576 changer transitions 377/1849 dead transitions. [2024-06-27 17:03:38,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1849 transitions, 18103 flow [2024-06-27 17:03:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2024-06-27 17:03:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2024-06-27 17:03:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 2222 transitions. [2024-06-27 17:03:38,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3800889497092029 [2024-06-27 17:03:38,232 INFO L175 Difference]: Start difference. First operand has 180 places, 195 transitions, 1657 flow. Second operand 158 states and 2222 transitions. [2024-06-27 17:03:38,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1849 transitions, 18103 flow [2024-06-27 17:03:41,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1849 transitions, 16143 flow, removed 978 selfloop flow, removed 10 redundant places. [2024-06-27 17:03:41,988 INFO L231 Difference]: Finished difference. Result has 361 places, 710 transitions, 8606 flow [2024-06-27 17:03:41,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=8606, PETRI_PLACES=361, PETRI_TRANSITIONS=710} [2024-06-27 17:03:41,989 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 322 predicate places. [2024-06-27 17:03:41,989 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 710 transitions, 8606 flow [2024-06-27 17:03:41,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 8.425531914893616) internal successors, (396), 47 states have internal predecessors, (396), 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 17:03:41,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:41,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:42,003 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 17:03:42,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:42,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:42,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:42,202 INFO L85 PathProgramCache]: Analyzing trace with hash 255330232, now seen corresponding path program 5 times [2024-06-27 17:03:42,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:42,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715348054] [2024-06-27 17:03:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:43,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:43,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715348054] [2024-06-27 17:03:43,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715348054] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:43,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256538499] [2024-06-27 17:03:43,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:03:43,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:43,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:43,117 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 17:03:43,118 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 17:03:43,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:03:43,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:43,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 17:03:43,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:43,765 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-06-27 17:03:43,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2024-06-27 17:03:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:43,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:44,206 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 17:03:44,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2024-06-27 17:03:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:44,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256538499] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:44,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:44,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2024-06-27 17:03:44,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662789680] [2024-06-27 17:03:44,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:44,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-06-27 17:03:44,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:44,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-06-27 17:03:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2024-06-27 17:03:44,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-06-27 17:03:44,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 710 transitions, 8606 flow. Second operand has 44 states, 44 states have (on average 10.204545454545455) internal successors, (449), 44 states have internal predecessors, (449), 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 17:03:44,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:44,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-06-27 17:03:44,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:57,490 INFO L124 PetriNetUnfolderBase]: 19464/32046 cut-off events. [2024-06-27 17:03:57,491 INFO L125 PetriNetUnfolderBase]: For 505682/507030 co-relation queries the response was YES. [2024-06-27 17:03:57,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195294 conditions, 32046 events. 19464/32046 cut-off events. For 505682/507030 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 230672 event pairs, 2379 based on Foata normal form. 290/31841 useless extension candidates. Maximal degree in co-relation 195000. Up to 12060 conditions per place. [2024-06-27 17:03:58,107 INFO L140 encePairwiseOnDemand]: 21/37 looper letters, 746 selfloop transitions, 543 changer transitions 185/1532 dead transitions. [2024-06-27 17:03:58,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1532 transitions, 20242 flow [2024-06-27 17:03:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-06-27 17:03:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-06-27 17:03:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1039 transitions. [2024-06-27 17:03:58,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43201663201663204 [2024-06-27 17:03:58,109 INFO L175 Difference]: Start difference. First operand has 361 places, 710 transitions, 8606 flow. Second operand 65 states and 1039 transitions. [2024-06-27 17:03:58,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1532 transitions, 20242 flow [2024-06-27 17:04:18,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1532 transitions, 17052 flow, removed 1434 selfloop flow, removed 20 redundant places. [2024-06-27 17:04:18,418 INFO L231 Difference]: Finished difference. Result has 413 places, 932 transitions, 11361 flow [2024-06-27 17:04:18,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7067, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=11361, PETRI_PLACES=413, PETRI_TRANSITIONS=932} [2024-06-27 17:04:18,419 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 374 predicate places. [2024-06-27 17:04:18,420 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 932 transitions, 11361 flow [2024-06-27 17:04:18,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 10.204545454545455) internal successors, (449), 44 states have internal predecessors, (449), 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 17:04:18,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:18,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:18,434 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 17:04:18,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:04:18,632 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:04:18,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:18,632 INFO L85 PathProgramCache]: Analyzing trace with hash -350989846, now seen corresponding path program 6 times [2024-06-27 17:04:18,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:18,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188785447] [2024-06-27 17:04:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:18,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:19,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:19,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188785447] [2024-06-27 17:04:19,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188785447] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:04:19,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41758363] [2024-06-27 17:04:19,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:04:19,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:04:19,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:04:19,404 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 17:04:19,436 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 17:04:19,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:04:19,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:04:19,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 17:04:19,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:04:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:20,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:04:20,535 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-06-27 17:04:20,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 17:04:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:20,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41758363] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:04:20,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:04:20,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2024-06-27 17:04:20,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888824979] [2024-06-27 17:04:20,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:04:20,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-06-27 17:04:20,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-06-27 17:04:20,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1558, Unknown=0, NotChecked=0, Total=1806 [2024-06-27 17:04:20,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-06-27 17:04:20,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 932 transitions, 11361 flow. Second operand has 43 states, 43 states have (on average 11.30232558139535) internal successors, (486), 43 states have internal predecessors, (486), 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 17:04:20,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:20,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-06-27 17:04:20,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:45,772 INFO L124 PetriNetUnfolderBase]: 34253/59643 cut-off events. [2024-06-27 17:04:45,773 INFO L125 PetriNetUnfolderBase]: For 1008893/1010177 co-relation queries the response was YES. [2024-06-27 17:04:46,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355034 conditions, 59643 events. 34253/59643 cut-off events. For 1008893/1010177 co-relation queries the response was YES. Maximal size of possible extension queue 1665. Compared 517575 event pairs, 1867 based on Foata normal form. 1238/60126 useless extension candidates. Maximal degree in co-relation 354806. Up to 8582 conditions per place. [2024-06-27 17:04:46,801 INFO L140 encePairwiseOnDemand]: 21/37 looper letters, 1072 selfloop transitions, 1428 changer transitions 824/3378 dead transitions. [2024-06-27 17:04:46,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 3378 transitions, 44542 flow [2024-06-27 17:04:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2024-06-27 17:04:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2024-06-27 17:04:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 2902 transitions. [2024-06-27 17:04:46,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453366661459147 [2024-06-27 17:04:46,806 INFO L175 Difference]: Start difference. First operand has 413 places, 932 transitions, 11361 flow. Second operand 173 states and 2902 transitions. [2024-06-27 17:04:46,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 3378 transitions, 44542 flow [2024-06-27 17:05:07,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 3378 transitions, 42282 flow, removed 495 selfloop flow, removed 36 redundant places. [2024-06-27 17:05:07,751 INFO L231 Difference]: Finished difference. Result has 620 places, 1679 transitions, 26130 flow [2024-06-27 17:05:07,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=10620, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=173, PETRI_FLOW=26130, PETRI_PLACES=620, PETRI_TRANSITIONS=1679} [2024-06-27 17:05:07,753 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 581 predicate places. [2024-06-27 17:05:07,753 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 1679 transitions, 26130 flow [2024-06-27 17:05:07,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 11.30232558139535) internal successors, (486), 43 states have internal predecessors, (486), 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 17:05:07,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:07,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:07,765 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 17:05:07,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:07,958 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:05:07,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1994742794, now seen corresponding path program 7 times [2024-06-27 17:05:07,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:07,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588351467] [2024-06-27 17:05:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:07,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:08,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:08,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588351467] [2024-06-27 17:05:08,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588351467] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:08,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627455543] [2024-06-27 17:05:08,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:05:08,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:08,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:08,627 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 17:05:08,628 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 17:05:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:08,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 17:05:08,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:09,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:09,679 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-06-27 17:05:09,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 17:05:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:10,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627455543] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:10,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:10,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 46 [2024-06-27 17:05:10,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493187813] [2024-06-27 17:05:10,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:10,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-06-27 17:05:10,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:10,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-06-27 17:05:10,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2024-06-27 17:05:10,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 37 [2024-06-27 17:05:10,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 1679 transitions, 26130 flow. Second operand has 47 states, 47 states have (on average 8.340425531914894) internal successors, (392), 47 states have internal predecessors, (392), 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 17:05:10,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:10,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 37 [2024-06-27 17:05:10,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand