./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:49:16,592 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:49:16,637 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:49:16,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:49:16,643 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:49:16,661 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:49:16,662 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:49:16,662 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:49:16,662 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:49:16,663 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:49:16,663 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:49:16,663 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:49:16,664 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:49:16,664 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:49:16,664 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:49:16,665 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:49:16,665 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:49:16,665 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:49:16,667 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:49:16,668 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:49:16,668 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:49:16,668 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:49:16,669 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:49:16,669 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:49:16,672 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:49:16,672 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:49:16,672 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:49:16,672 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:49:16,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:49:16,673 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:49:16,673 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:49:16,673 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:49:16,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:49:16,674 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:49:16,674 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:49:16,674 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:49:16,674 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:49:16,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:49:16,675 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:49:16,675 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:49:16,675 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:49:16,676 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:49:16,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2024-11-19 01:49:16,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:49:16,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:49:16,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:49:16,905 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:49:16,905 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:49:16,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-11-19 01:49:18,149 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:49:18,295 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:49:18,295 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-11-19 01:49:18,306 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a1e98e5b/167bc089c5764dd3aa2acf1378b593a0/FLAG83d12cf4a [2024-11-19 01:49:18,708 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a1e98e5b/167bc089c5764dd3aa2acf1378b593a0 [2024-11-19 01:49:18,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:49:18,712 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:49:18,713 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:49:18,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:49:18,717 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:49:18,718 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:18,719 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363a2c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18, skipping insertion in model container [2024-11-19 01:49:18,719 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:18,738 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:49:18,909 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2024-11-19 01:49:18,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:49:18,937 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:49:18,954 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2024-11-19 01:49:18,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:49:18,980 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:49:18,981 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18 WrapperNode [2024-11-19 01:49:18,981 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:49:18,982 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:49:18,982 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:49:18,982 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:49:18,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:18,992 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,009 INFO L138 Inliner]: procedures = 25, calls = 26, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 132 [2024-11-19 01:49:19,012 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:49:19,012 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:49:19,012 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:49:19,012 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:49:19,021 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,024 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,033 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]. [2024-11-19 01:49:19,033 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,045 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,050 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,051 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:49:19,052 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:49:19,052 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:49:19,052 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:49:19,053 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (1/1) ... [2024-11-19 01:49:19,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:49:19,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:19,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 01:49:19,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 01:49:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:49:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:49:19,107 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:49:19,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:49:19,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 01:49:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 01:49:19,110 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:49:19,182 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:49:19,183 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:49:19,335 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:49:19,335 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:49:19,484 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:49:19,484 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 01:49:19,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:49:19 BoogieIcfgContainer [2024-11-19 01:49:19,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:49:19,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:49:19,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:49:19,490 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:49:19,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:49:18" (1/3) ... [2024-11-19 01:49:19,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d39b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:49:19, skipping insertion in model container [2024-11-19 01:49:19,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:49:18" (2/3) ... [2024-11-19 01:49:19,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d39b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:49:19, skipping insertion in model container [2024-11-19 01:49:19,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:49:19" (3/3) ... [2024-11-19 01:49:19,492 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-11-19 01:49:19,504 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:49:19,504 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:49:19,504 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:49:19,539 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:49:19,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2024-11-19 01:49:19,588 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-11-19 01:49:19,588 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:49:19,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 22 events. 3/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-11-19 01:49:19,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2024-11-19 01:49:19,592 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2024-11-19 01:49:19,604 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:49:19,610 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73818c54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:49:19,611 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:49:19,622 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:49:19,622 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-19 01:49:19,622 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:49:19,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:19,623 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:19,623 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:19,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash -15705077, now seen corresponding path program 1 times [2024-11-19 01:49:19,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:19,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981383902] [2024-11-19 01:49:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:19,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:19,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981383902] [2024-11-19 01:49:19,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981383902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:49:19,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:49:19,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:49:19,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734592817] [2024-11-19 01:49:19,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:49:19,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:49:19,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:19,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:49:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:49:19,905 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-19 01:49:19,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:19,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:19,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-19 01:49:19,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:20,050 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2024-11-19 01:49:20,050 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-19 01:49:20,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 181 events. 93/181 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 581 event pairs, 22 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 315. Up to 113 conditions per place. [2024-11-19 01:49:20,053 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 25 selfloop transitions, 3 changer transitions 1/32 dead transitions. [2024-11-19 01:49:20,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 143 flow [2024-11-19 01:49:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:49:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:49:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-11-19 01:49:20,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-19 01:49:20,063 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2024-11-19 01:49:20,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 143 flow [2024-11-19 01:49:20,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 01:49:20,067 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 65 flow [2024-11-19 01:49:20,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-11-19 01:49:20,071 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2024-11-19 01:49:20,071 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 65 flow [2024-11-19 01:49:20,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:20,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:20,072 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:20,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:49:20,072 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:20,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:20,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1557574075, now seen corresponding path program 1 times [2024-11-19 01:49:20,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:20,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433538142] [2024-11-19 01:49:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:20,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:20,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:20,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433538142] [2024-11-19 01:49:20,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433538142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:49:20,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:49:20,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:49:20,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640891024] [2024-11-19 01:49:20,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:49:20,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:49:20,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:49:20,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:49:20,279 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:20,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:20,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:20,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:20,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:20,407 INFO L124 PetriNetUnfolderBase]: 171/329 cut-off events. [2024-11-19 01:49:20,407 INFO L125 PetriNetUnfolderBase]: For 43/46 co-relation queries the response was YES. [2024-11-19 01:49:20,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 329 events. 171/329 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1328 event pairs, 111 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 257. Up to 209 conditions per place. [2024-11-19 01:49:20,410 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 40 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-11-19 01:49:20,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 220 flow [2024-11-19 01:49:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:49:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:49:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-11-19 01:49:20,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-11-19 01:49:20,414 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 65 flow. Second operand 5 states and 62 transitions. [2024-11-19 01:49:20,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 220 flow [2024-11-19 01:49:20,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:49:20,415 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 98 flow [2024-11-19 01:49:20,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-11-19 01:49:20,416 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-11-19 01:49:20,416 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 98 flow [2024-11-19 01:49:20,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:20,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:20,417 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:20,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:49:20,417 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:20,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:20,418 INFO L85 PathProgramCache]: Analyzing trace with hash -577907976, now seen corresponding path program 1 times [2024-11-19 01:49:20,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:20,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948014799] [2024-11-19 01:49:20,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:20,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:20,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948014799] [2024-11-19 01:49:20,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948014799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:49:20,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:49:20,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:49:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770693986] [2024-11-19 01:49:20,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:49:20,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:49:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:49:20,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:49:20,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:20,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:20,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:20,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:20,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:20,619 INFO L124 PetriNetUnfolderBase]: 138/264 cut-off events. [2024-11-19 01:49:20,619 INFO L125 PetriNetUnfolderBase]: For 100/114 co-relation queries the response was YES. [2024-11-19 01:49:20,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 264 events. 138/264 cut-off events. For 100/114 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 961 event pairs, 95 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 509. Up to 205 conditions per place. [2024-11-19 01:49:20,621 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 20 selfloop transitions, 2 changer transitions 15/39 dead transitions. [2024-11-19 01:49:20,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 209 flow [2024-11-19 01:49:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:49:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:49:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-11-19 01:49:20,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-19 01:49:20,623 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 98 flow. Second operand 5 states and 56 transitions. [2024-11-19 01:49:20,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 209 flow [2024-11-19 01:49:20,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 205 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 01:49:20,625 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 86 flow [2024-11-19 01:49:20,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2024-11-19 01:49:20,625 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-11-19 01:49:20,625 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 86 flow [2024-11-19 01:49:20,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:20,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:20,626 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:20,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:49:20,626 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:20,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash 182329702, now seen corresponding path program 1 times [2024-11-19 01:49:20,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:20,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796436821] [2024-11-19 01:49:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:20,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:20,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:20,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796436821] [2024-11-19 01:49:20,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796436821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:20,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480421744] [2024-11-19 01:49:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:20,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:20,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:20,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:20,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:49:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:20,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:49:20,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:20,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:20,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480421744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:20,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:20,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-19 01:49:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531863509] [2024-11-19 01:49:20,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:20,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:49:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:49:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:49:20,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:20,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 86 flow. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:20,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:20,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:20,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:21,073 INFO L124 PetriNetUnfolderBase]: 139/249 cut-off events. [2024-11-19 01:49:21,073 INFO L125 PetriNetUnfolderBase]: For 83/103 co-relation queries the response was YES. [2024-11-19 01:49:21,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 249 events. 139/249 cut-off events. For 83/103 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 835 event pairs, 33 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 642. Up to 101 conditions per place. [2024-11-19 01:49:21,074 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 31 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-11-19 01:49:21,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 214 flow [2024-11-19 01:49:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:49:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:49:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-11-19 01:49:21,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-11-19 01:49:21,077 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 86 flow. Second operand 7 states and 64 transitions. [2024-11-19 01:49:21,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 214 flow [2024-11-19 01:49:21,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 186 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-19 01:49:21,078 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 97 flow [2024-11-19 01:49:21,078 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-11-19 01:49:21,079 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2024-11-19 01:49:21,079 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 97 flow [2024-11-19 01:49:21,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:21,081 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:21,081 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:21,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:21,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:21,282 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:21,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash -490579767, now seen corresponding path program 1 times [2024-11-19 01:49:21,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:21,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3196108] [2024-11-19 01:49:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:21,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:21,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:21,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3196108] [2024-11-19 01:49:21,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3196108] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:21,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314765551] [2024-11-19 01:49:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:21,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:21,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:21,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:21,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:49:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:21,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:49:21,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:21,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:21,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314765551] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:21,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:49:21,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-19 01:49:21,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311235687] [2024-11-19 01:49:21,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:49:21,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:49:21,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:21,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:49:21,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:49:21,480 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:21,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:21,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:21,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:21,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:21,541 INFO L124 PetriNetUnfolderBase]: 136/254 cut-off events. [2024-11-19 01:49:21,541 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-19 01:49:21,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 671 conditions, 254 events. 136/254 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 814 event pairs, 43 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 649. Up to 130 conditions per place. [2024-11-19 01:49:21,543 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 28 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-11-19 01:49:21,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 201 flow [2024-11-19 01:49:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:49:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:49:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2024-11-19 01:49:21,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-11-19 01:49:21,547 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 97 flow. Second operand 5 states and 49 transitions. [2024-11-19 01:49:21,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 201 flow [2024-11-19 01:49:21,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:49:21,549 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 117 flow [2024-11-19 01:49:21,549 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2024-11-19 01:49:21,550 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 12 predicate places. [2024-11-19 01:49:21,551 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 117 flow [2024-11-19 01:49:21,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:21,551 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:21,551 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:21,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 01:49:21,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:21,752 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:21,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:21,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1176065503, now seen corresponding path program 1 times [2024-11-19 01:49:21,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:21,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355730312] [2024-11-19 01:49:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:21,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:22,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:22,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355730312] [2024-11-19 01:49:22,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355730312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:22,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367945593] [2024-11-19 01:49:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:49:22,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:22,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:22,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:22,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:49:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:22,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 01:49:22,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:22,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:22,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:22,157 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 21 treesize of output 14 [2024-11-19 01:49:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:22,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367945593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:22,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:22,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-11-19 01:49:22,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057949793] [2024-11-19 01:49:22,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:22,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:49:22,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:22,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:49:22,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:49:22,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-19 01:49:22,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 117 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:22,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:22,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-19 01:49:22,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:22,406 INFO L124 PetriNetUnfolderBase]: 172/341 cut-off events. [2024-11-19 01:49:22,406 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2024-11-19 01:49:22,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 341 events. 172/341 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1329 event pairs, 29 based on Foata normal form. 2/342 useless extension candidates. Maximal degree in co-relation 1000. Up to 195 conditions per place. [2024-11-19 01:49:22,408 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 41 selfloop transitions, 23 changer transitions 2/71 dead transitions. [2024-11-19 01:49:22,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 419 flow [2024-11-19 01:49:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:49:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:49:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-11-19 01:49:22,413 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-19 01:49:22,413 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 117 flow. Second operand 10 states and 114 transitions. [2024-11-19 01:49:22,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 419 flow [2024-11-19 01:49:22,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 71 transitions, 408 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 01:49:22,416 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 288 flow [2024-11-19 01:49:22,416 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=288, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-11-19 01:49:22,417 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2024-11-19 01:49:22,417 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 288 flow [2024-11-19 01:49:22,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:22,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:22,417 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:22,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:22,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:22,620 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:22,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:22,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1605095481, now seen corresponding path program 2 times [2024-11-19 01:49:22,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:22,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963672598] [2024-11-19 01:49:22,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:49:22,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:22,651 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:22,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:22,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:22,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963672598] [2024-11-19 01:49:22,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963672598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:22,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611069082] [2024-11-19 01:49:22,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:49:22,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:22,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:22,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:22,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:49:22,979 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:22,979 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:22,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 01:49:22,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:23,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:23,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:23,086 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 21 treesize of output 14 [2024-11-19 01:49:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:23,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611069082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:23,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:23,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-11-19 01:49:23,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772339429] [2024-11-19 01:49:23,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:23,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:49:23,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:23,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:49:23,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:49:23,155 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-19 01:49:23,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 288 flow. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:23,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:23,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-19 01:49:23,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:23,331 INFO L124 PetriNetUnfolderBase]: 212/424 cut-off events. [2024-11-19 01:49:23,331 INFO L125 PetriNetUnfolderBase]: For 719/723 co-relation queries the response was YES. [2024-11-19 01:49:23,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 424 events. 212/424 cut-off events. For 719/723 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1843 event pairs, 37 based on Foata normal form. 5/427 useless extension candidates. Maximal degree in co-relation 1486. Up to 208 conditions per place. [2024-11-19 01:49:23,333 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 36 selfloop transitions, 39 changer transitions 1/81 dead transitions. [2024-11-19 01:49:23,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 81 transitions, 610 flow [2024-11-19 01:49:23,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:49:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:49:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-11-19 01:49:23,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47685185185185186 [2024-11-19 01:49:23,334 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 288 flow. Second operand 9 states and 103 transitions. [2024-11-19 01:49:23,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 81 transitions, 610 flow [2024-11-19 01:49:23,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 578 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-11-19 01:49:23,338 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 475 flow [2024-11-19 01:49:23,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=475, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2024-11-19 01:49:23,338 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2024-11-19 01:49:23,338 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 475 flow [2024-11-19 01:49:23,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:23,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:23,339 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:23,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:49:23,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:23,539 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:23,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash -640245501, now seen corresponding path program 3 times [2024-11-19 01:49:23,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:23,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325060983] [2024-11-19 01:49:23,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:49:23,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:23,557 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:49:23,558 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:23,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:23,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325060983] [2024-11-19 01:49:23,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325060983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:23,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143487872] [2024-11-19 01:49:23,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:49:23,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:23,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:23,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:23,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:49:23,848 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:49:23,848 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:23,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 01:49:23,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:23,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:23,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:23,929 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 17 treesize of output 14 [2024-11-19 01:49:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:23,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143487872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:23,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:23,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-11-19 01:49:23,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355442863] [2024-11-19 01:49:23,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:23,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:49:23,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:49:23,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:49:23,966 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-19 01:49:23,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 475 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:23,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:23,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-19 01:49:23,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:24,172 INFO L124 PetriNetUnfolderBase]: 268/537 cut-off events. [2024-11-19 01:49:24,172 INFO L125 PetriNetUnfolderBase]: For 1170/1178 co-relation queries the response was YES. [2024-11-19 01:49:24,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2072 conditions, 537 events. 268/537 cut-off events. For 1170/1178 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2543 event pairs, 37 based on Foata normal form. 9/542 useless extension candidates. Maximal degree in co-relation 2038. Up to 223 conditions per place. [2024-11-19 01:49:24,175 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 44 selfloop transitions, 55 changer transitions 1/105 dead transitions. [2024-11-19 01:49:24,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 878 flow [2024-11-19 01:49:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:49:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:49:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-11-19 01:49:24,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-11-19 01:49:24,176 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 475 flow. Second operand 11 states and 125 transitions. [2024-11-19 01:49:24,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 878 flow [2024-11-19 01:49:24,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 105 transitions, 815 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-11-19 01:49:24,181 INFO L231 Difference]: Finished difference. Result has 65 places, 78 transitions, 679 flow [2024-11-19 01:49:24,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=679, PETRI_PLACES=65, PETRI_TRANSITIONS=78} [2024-11-19 01:49:24,182 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2024-11-19 01:49:24,182 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 78 transitions, 679 flow [2024-11-19 01:49:24,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:24,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:24,183 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:24,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 01:49:24,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:24,387 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:24,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:24,387 INFO L85 PathProgramCache]: Analyzing trace with hash -433954945, now seen corresponding path program 4 times [2024-11-19 01:49:24,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:24,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460457142] [2024-11-19 01:49:24,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:49:24,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:24,398 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:49:24,398 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:24,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:24,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460457142] [2024-11-19 01:49:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460457142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:24,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181055273] [2024-11-19 01:49:24,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:49:24,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:24,560 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:24,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 01:49:24,613 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:49:24,613 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:24,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 01:49:24,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:24,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:24,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:24,705 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 21 treesize of output 14 [2024-11-19 01:49:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:24,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181055273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:24,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:24,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2024-11-19 01:49:24,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141329840] [2024-11-19 01:49:24,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:24,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:49:24,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:49:24,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:49:24,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-19 01:49:24,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 679 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:24,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:24,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-19 01:49:24,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:24,920 INFO L124 PetriNetUnfolderBase]: 307/612 cut-off events. [2024-11-19 01:49:24,920 INFO L125 PetriNetUnfolderBase]: For 1570/1576 co-relation queries the response was YES. [2024-11-19 01:49:24,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 612 events. 307/612 cut-off events. For 1570/1576 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3073 event pairs, 60 based on Foata normal form. 5/613 useless extension candidates. Maximal degree in co-relation 2412. Up to 457 conditions per place. [2024-11-19 01:49:24,923 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 77 selfloop transitions, 21 changer transitions 1/104 dead transitions. [2024-11-19 01:49:24,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 1003 flow [2024-11-19 01:49:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 01:49:24,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 01:49:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-11-19 01:49:24,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2024-11-19 01:49:24,924 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 679 flow. Second operand 8 states and 91 transitions. [2024-11-19 01:49:24,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 1003 flow [2024-11-19 01:49:24,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 104 transitions, 963 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-11-19 01:49:24,928 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 786 flow [2024-11-19 01:49:24,929 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=786, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-11-19 01:49:24,929 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2024-11-19 01:49:24,929 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 786 flow [2024-11-19 01:49:24,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:24,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:24,929 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:24,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 01:49:25,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:25,130 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:25,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:25,130 INFO L85 PathProgramCache]: Analyzing trace with hash -693469303, now seen corresponding path program 5 times [2024-11-19 01:49:25,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:25,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370468118] [2024-11-19 01:49:25,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:49:25,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:25,146 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:25,146 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:25,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:25,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370468118] [2024-11-19 01:49:25,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370468118] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:25,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320186883] [2024-11-19 01:49:25,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:49:25,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:25,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:25,334 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:25,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 01:49:25,389 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:25,389 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:25,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 01:49:25,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:25,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:25,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:25,476 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 21 treesize of output 14 [2024-11-19 01:49:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:25,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320186883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:25,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:25,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2024-11-19 01:49:25,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441092717] [2024-11-19 01:49:25,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:25,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:49:25,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:49:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:49:25,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-19 01:49:25,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 786 flow. Second operand has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:25,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:25,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-19 01:49:25,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:25,778 INFO L124 PetriNetUnfolderBase]: 346/693 cut-off events. [2024-11-19 01:49:25,778 INFO L125 PetriNetUnfolderBase]: For 1981/1985 co-relation queries the response was YES. [2024-11-19 01:49:25,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2802 conditions, 693 events. 346/693 cut-off events. For 1981/1985 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3626 event pairs, 66 based on Foata normal form. 5/697 useless extension candidates. Maximal degree in co-relation 2761. Up to 522 conditions per place. [2024-11-19 01:49:25,783 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 85 selfloop transitions, 16 changer transitions 1/107 dead transitions. [2024-11-19 01:49:25,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 107 transitions, 1080 flow [2024-11-19 01:49:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:49:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:49:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-11-19 01:49:25,784 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-11-19 01:49:25,784 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 786 flow. Second operand 9 states and 92 transitions. [2024-11-19 01:49:25,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 107 transitions, 1080 flow [2024-11-19 01:49:25,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 1070 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-19 01:49:25,791 INFO L231 Difference]: Finished difference. Result has 82 places, 92 transitions, 841 flow [2024-11-19 01:49:25,792 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=841, PETRI_PLACES=82, PETRI_TRANSITIONS=92} [2024-11-19 01:49:25,792 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 57 predicate places. [2024-11-19 01:49:25,793 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 92 transitions, 841 flow [2024-11-19 01:49:25,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:25,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:25,793 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:25,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:25,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:25,998 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:25,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:25,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1682150123, now seen corresponding path program 6 times [2024-11-19 01:49:25,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:25,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335487427] [2024-11-19 01:49:25,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:49:26,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:26,015 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:49:26,016 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:26,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335487427] [2024-11-19 01:49:26,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335487427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358538996] [2024-11-19 01:49:26,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:49:26,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:26,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:26,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:26,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 01:49:26,315 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:49:26,315 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:26,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 01:49:26,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:26,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:26,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:26,383 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 17 treesize of output 14 [2024-11-19 01:49:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:26,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358538996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:26,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:26,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-11-19 01:49:26,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22307979] [2024-11-19 01:49:26,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:26,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:49:26,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:26,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:49:26,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:49:26,422 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-19 01:49:26,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 92 transitions, 841 flow. Second operand has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:26,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:26,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-19 01:49:26,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:26,632 INFO L124 PetriNetUnfolderBase]: 408/813 cut-off events. [2024-11-19 01:49:26,633 INFO L125 PetriNetUnfolderBase]: For 2541/2545 co-relation queries the response was YES. [2024-11-19 01:49:26,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3353 conditions, 813 events. 408/813 cut-off events. For 2541/2545 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4375 event pairs, 63 based on Foata normal form. 2/811 useless extension candidates. Maximal degree in co-relation 3308. Up to 576 conditions per place. [2024-11-19 01:49:26,637 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 92 selfloop transitions, 32 changer transitions 2/131 dead transitions. [2024-11-19 01:49:26,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 131 transitions, 1317 flow [2024-11-19 01:49:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:49:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:49:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-11-19 01:49:26,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-11-19 01:49:26,638 INFO L175 Difference]: Start difference. First operand has 82 places, 92 transitions, 841 flow. Second operand 11 states and 120 transitions. [2024-11-19 01:49:26,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 131 transitions, 1317 flow [2024-11-19 01:49:26,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 131 transitions, 1300 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-19 01:49:26,645 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 1045 flow [2024-11-19 01:49:26,645 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1045, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-11-19 01:49:26,646 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2024-11-19 01:49:26,646 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 1045 flow [2024-11-19 01:49:26,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:26,646 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:26,647 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:26,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 01:49:26,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-19 01:49:26,851 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:26,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:26,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1513182553, now seen corresponding path program 7 times [2024-11-19 01:49:26,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:26,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402105275] [2024-11-19 01:49:26,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:49:26,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:26,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:26,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402105275] [2024-11-19 01:49:26,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402105275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:26,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420652136] [2024-11-19 01:49:26,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:49:26,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:26,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:26,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:26,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 01:49:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:26,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:49:26,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:27,042 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420652136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:27,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:27,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 01:49:27,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168632450] [2024-11-19 01:49:27,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:27,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:49:27,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:49:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:49:27,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:27,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 1045 flow. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:27,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:27,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:27,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:27,367 INFO L124 PetriNetUnfolderBase]: 905/1735 cut-off events. [2024-11-19 01:49:27,367 INFO L125 PetriNetUnfolderBase]: For 6466/6470 co-relation queries the response was YES. [2024-11-19 01:49:27,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7433 conditions, 1735 events. 905/1735 cut-off events. For 6466/6470 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10563 event pairs, 404 based on Foata normal form. 66/1801 useless extension candidates. Maximal degree in co-relation 7027. Up to 945 conditions per place. [2024-11-19 01:49:27,377 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 201 selfloop transitions, 22 changer transitions 0/226 dead transitions. [2024-11-19 01:49:27,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 226 transitions, 2662 flow [2024-11-19 01:49:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:49:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:49:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-11-19 01:49:27,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-11-19 01:49:27,380 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 1045 flow. Second operand 7 states and 81 transitions. [2024-11-19 01:49:27,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 226 transitions, 2662 flow [2024-11-19 01:49:27,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 226 transitions, 2539 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-11-19 01:49:27,391 INFO L231 Difference]: Finished difference. Result has 99 places, 127 transitions, 1321 flow [2024-11-19 01:49:27,391 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1321, PETRI_PLACES=99, PETRI_TRANSITIONS=127} [2024-11-19 01:49:27,391 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 74 predicate places. [2024-11-19 01:49:27,391 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 127 transitions, 1321 flow [2024-11-19 01:49:27,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:27,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:27,392 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:27,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 01:49:27,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:27,592 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:27,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:27,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1186603380, now seen corresponding path program 8 times [2024-11-19 01:49:27,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:27,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961065308] [2024-11-19 01:49:27,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:49:27,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:27,601 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:27,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:27,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:27,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961065308] [2024-11-19 01:49:27,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961065308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:27,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691509092] [2024-11-19 01:49:27,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:49:27,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:27,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:27,661 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:27,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 01:49:27,716 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:27,716 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:27,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:49:27,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:27,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:27,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691509092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:27,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:27,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 01:49:27,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999038948] [2024-11-19 01:49:27,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:27,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:49:27,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:27,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:49:27,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:49:27,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:27,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 127 transitions, 1321 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:27,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:27,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:27,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:28,045 INFO L124 PetriNetUnfolderBase]: 800/1536 cut-off events. [2024-11-19 01:49:28,045 INFO L125 PetriNetUnfolderBase]: For 6117/6167 co-relation queries the response was YES. [2024-11-19 01:49:28,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6917 conditions, 1536 events. 800/1536 cut-off events. For 6117/6167 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9052 event pairs, 405 based on Foata normal form. 62/1597 useless extension candidates. Maximal degree in co-relation 6524. Up to 969 conditions per place. [2024-11-19 01:49:28,054 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 102 selfloop transitions, 3 changer transitions 76/184 dead transitions. [2024-11-19 01:49:28,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 184 transitions, 2216 flow [2024-11-19 01:49:28,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:49:28,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:49:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-11-19 01:49:28,055 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-19 01:49:28,055 INFO L175 Difference]: Start difference. First operand has 99 places, 127 transitions, 1321 flow. Second operand 7 states and 78 transitions. [2024-11-19 01:49:28,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 184 transitions, 2216 flow [2024-11-19 01:49:28,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 184 transitions, 2200 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-19 01:49:28,071 INFO L231 Difference]: Finished difference. Result has 106 places, 108 transitions, 1079 flow [2024-11-19 01:49:28,071 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1079, PETRI_PLACES=106, PETRI_TRANSITIONS=108} [2024-11-19 01:49:28,071 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 81 predicate places. [2024-11-19 01:49:28,072 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 108 transitions, 1079 flow [2024-11-19 01:49:28,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:28,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:28,072 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:28,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 01:49:28,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 01:49:28,272 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:28,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:28,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1092073402, now seen corresponding path program 9 times [2024-11-19 01:49:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:28,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743571874] [2024-11-19 01:49:28,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:49:28,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:28,281 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:49:28,281 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 01:49:28,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:28,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743571874] [2024-11-19 01:49:28,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743571874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:28,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529189380] [2024-11-19 01:49:28,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:49:28,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:28,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:28,346 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:28,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 01:49:28,403 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:49:28,404 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:28,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:49:28,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 01:49:28,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 01:49:28,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529189380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:28,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:28,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-19 01:49:28,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387589223] [2024-11-19 01:49:28,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:28,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:49:28,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:28,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:49:28,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:49:28,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:28,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 1079 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:28,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:28,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:28,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:28,743 INFO L124 PetriNetUnfolderBase]: 509/921 cut-off events. [2024-11-19 01:49:28,743 INFO L125 PetriNetUnfolderBase]: For 3914/3960 co-relation queries the response was YES. [2024-11-19 01:49:28,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4413 conditions, 921 events. 509/921 cut-off events. For 3914/3960 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4470 event pairs, 84 based on Foata normal form. 69/989 useless extension candidates. Maximal degree in co-relation 4366. Up to 414 conditions per place. [2024-11-19 01:49:28,751 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 103 selfloop transitions, 25 changer transitions 0/131 dead transitions. [2024-11-19 01:49:28,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 131 transitions, 1505 flow [2024-11-19 01:49:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:49:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:49:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-11-19 01:49:28,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2024-11-19 01:49:28,752 INFO L175 Difference]: Start difference. First operand has 106 places, 108 transitions, 1079 flow. Second operand 9 states and 82 transitions. [2024-11-19 01:49:28,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 131 transitions, 1505 flow [2024-11-19 01:49:28,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1350 flow, removed 54 selfloop flow, removed 14 redundant places. [2024-11-19 01:49:28,765 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 1031 flow [2024-11-19 01:49:28,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1031, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-11-19 01:49:28,766 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 71 predicate places. [2024-11-19 01:49:28,766 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 1031 flow [2024-11-19 01:49:28,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:28,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:28,767 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:28,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:28,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 01:49:28,968 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:28,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:28,968 INFO L85 PathProgramCache]: Analyzing trace with hash 282254261, now seen corresponding path program 10 times [2024-11-19 01:49:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:28,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322641766] [2024-11-19 01:49:28,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:49:28,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:28,976 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:49:28,976 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:29,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:29,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322641766] [2024-11-19 01:49:29,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322641766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:29,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923126999] [2024-11-19 01:49:29,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:49:29,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:29,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:29,010 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:29,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 01:49:29,066 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:49:29,067 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:29,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:49:29,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:29,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:29,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923126999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:29,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:29,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-11-19 01:49:29,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133320729] [2024-11-19 01:49:29,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:29,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:49:29,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:29,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:49:29,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:49:29,132 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-19 01:49:29,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 1031 flow. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:29,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:29,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-19 01:49:29,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:29,337 INFO L124 PetriNetUnfolderBase]: 800/1374 cut-off events. [2024-11-19 01:49:29,337 INFO L125 PetriNetUnfolderBase]: For 5099/5099 co-relation queries the response was YES. [2024-11-19 01:49:29,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6045 conditions, 1374 events. 800/1374 cut-off events. For 5099/5099 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6561 event pairs, 195 based on Foata normal form. 3/1377 useless extension candidates. Maximal degree in co-relation 5991. Up to 459 conditions per place. [2024-11-19 01:49:29,346 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 152 selfloop transitions, 19 changer transitions 10/182 dead transitions. [2024-11-19 01:49:29,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 182 transitions, 1949 flow [2024-11-19 01:49:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:49:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:49:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-11-19 01:49:29,347 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-11-19 01:49:29,347 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 1031 flow. Second operand 7 states and 83 transitions. [2024-11-19 01:49:29,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 182 transitions, 1949 flow [2024-11-19 01:49:29,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 182 transitions, 1896 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-19 01:49:29,357 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1080 flow [2024-11-19 01:49:29,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1080, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-11-19 01:49:29,358 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 75 predicate places. [2024-11-19 01:49:29,358 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1080 flow [2024-11-19 01:49:29,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:29,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:29,359 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:29,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 01:49:29,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 01:49:29,559 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:29,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1161325497, now seen corresponding path program 11 times [2024-11-19 01:49:29,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:29,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487449116] [2024-11-19 01:49:29,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:49:29,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:29,568 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:49:29,568 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:29,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487449116] [2024-11-19 01:49:29,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487449116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045572875] [2024-11-19 01:49:29,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:49:29,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:29,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:29,608 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:29,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 01:49:29,664 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:49:29,664 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:29,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:49:29,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:29,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:29,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045572875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:29,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:29,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-19 01:49:29,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882241480] [2024-11-19 01:49:29,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:29,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:49:29,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:29,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:49:29,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:49:29,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-19 01:49:29,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1080 flow. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:29,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:29,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-19 01:49:29,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:30,106 INFO L124 PetriNetUnfolderBase]: 1004/1694 cut-off events. [2024-11-19 01:49:30,106 INFO L125 PetriNetUnfolderBase]: For 6924/6924 co-relation queries the response was YES. [2024-11-19 01:49:30,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7929 conditions, 1694 events. 1004/1694 cut-off events. For 6924/6924 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8146 event pairs, 127 based on Foata normal form. 24/1718 useless extension candidates. Maximal degree in co-relation 7875. Up to 488 conditions per place. [2024-11-19 01:49:30,119 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 230 selfloop transitions, 75 changer transitions 0/306 dead transitions. [2024-11-19 01:49:30,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 306 transitions, 3199 flow [2024-11-19 01:49:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 01:49:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-19 01:49:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 224 transitions. [2024-11-19 01:49:30,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-11-19 01:49:30,121 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1080 flow. Second operand 22 states and 224 transitions. [2024-11-19 01:49:30,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 306 transitions, 3199 flow [2024-11-19 01:49:30,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 306 transitions, 3171 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-11-19 01:49:30,135 INFO L231 Difference]: Finished difference. Result has 131 places, 164 transitions, 1828 flow [2024-11-19 01:49:30,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1828, PETRI_PLACES=131, PETRI_TRANSITIONS=164} [2024-11-19 01:49:30,136 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 106 predicate places. [2024-11-19 01:49:30,136 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 164 transitions, 1828 flow [2024-11-19 01:49:30,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:30,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:30,136 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:30,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:30,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 01:49:30,340 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:30,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:30,341 INFO L85 PathProgramCache]: Analyzing trace with hash 510779821, now seen corresponding path program 12 times [2024-11-19 01:49:30,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:30,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805855963] [2024-11-19 01:49:30,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:49:30,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:30,350 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:49:30,350 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:30,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:30,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805855963] [2024-11-19 01:49:30,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805855963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:30,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050766490] [2024-11-19 01:49:30,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:49:30,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:30,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:30,398 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:30,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 01:49:30,460 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:49:30,460 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:30,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:49:30,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:30,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:30,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050766490] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:30,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:30,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 01:49:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306437485] [2024-11-19 01:49:30,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:30,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 01:49:30,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:30,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 01:49:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-19 01:49:30,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-19 01:49:30,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 164 transitions, 1828 flow. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:30,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:30,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-19 01:49:30,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:30,771 INFO L124 PetriNetUnfolderBase]: 1005/1710 cut-off events. [2024-11-19 01:49:30,771 INFO L125 PetriNetUnfolderBase]: For 11010/11010 co-relation queries the response was YES. [2024-11-19 01:49:30,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9473 conditions, 1710 events. 1005/1710 cut-off events. For 11010/11010 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8225 event pairs, 273 based on Foata normal form. 12/1722 useless extension candidates. Maximal degree in co-relation 9406. Up to 677 conditions per place. [2024-11-19 01:49:30,782 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 183 selfloop transitions, 40 changer transitions 7/231 dead transitions. [2024-11-19 01:49:30,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 231 transitions, 2920 flow [2024-11-19 01:49:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 01:49:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 01:49:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-11-19 01:49:30,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-11-19 01:49:30,783 INFO L175 Difference]: Start difference. First operand has 131 places, 164 transitions, 1828 flow. Second operand 8 states and 93 transitions. [2024-11-19 01:49:30,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 231 transitions, 2920 flow [2024-11-19 01:49:30,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 231 transitions, 2757 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-11-19 01:49:30,807 INFO L231 Difference]: Finished difference. Result has 133 places, 163 transitions, 1753 flow [2024-11-19 01:49:30,807 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1753, PETRI_PLACES=133, PETRI_TRANSITIONS=163} [2024-11-19 01:49:30,808 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 108 predicate places. [2024-11-19 01:49:30,808 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 163 transitions, 1753 flow [2024-11-19 01:49:30,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:30,808 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:30,808 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:30,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 01:49:31,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:31,009 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:31,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:31,009 INFO L85 PathProgramCache]: Analyzing trace with hash 231390721, now seen corresponding path program 13 times [2024-11-19 01:49:31,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:31,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879850125] [2024-11-19 01:49:31,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:49:31,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:31,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:31,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879850125] [2024-11-19 01:49:31,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879850125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:31,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316938980] [2024-11-19 01:49:31,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:49:31,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:31,104 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:31,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 01:49:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:31,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:49:31,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:31,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:31,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316938980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:31,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:31,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-19 01:49:31,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52160369] [2024-11-19 01:49:31,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:31,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:49:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:31,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:49:31,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:49:31,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:31,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 163 transitions, 1753 flow. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:31,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:31,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:31,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:31,478 INFO L124 PetriNetUnfolderBase]: 645/1156 cut-off events. [2024-11-19 01:49:31,478 INFO L125 PetriNetUnfolderBase]: For 8252/8286 co-relation queries the response was YES. [2024-11-19 01:49:31,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6441 conditions, 1156 events. 645/1156 cut-off events. For 8252/8286 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5553 event pairs, 82 based on Foata normal form. 46/1201 useless extension candidates. Maximal degree in co-relation 6376. Up to 394 conditions per place. [2024-11-19 01:49:31,487 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 143 selfloop transitions, 40 changer transitions 0/192 dead transitions. [2024-11-19 01:49:31,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 192 transitions, 2406 flow [2024-11-19 01:49:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:49:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:49:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2024-11-19 01:49:31,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2024-11-19 01:49:31,487 INFO L175 Difference]: Start difference. First operand has 133 places, 163 transitions, 1753 flow. Second operand 9 states and 85 transitions. [2024-11-19 01:49:31,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 192 transitions, 2406 flow [2024-11-19 01:49:31,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 2265 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-11-19 01:49:31,506 INFO L231 Difference]: Finished difference. Result has 130 places, 159 transitions, 1656 flow [2024-11-19 01:49:31,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1656, PETRI_PLACES=130, PETRI_TRANSITIONS=159} [2024-11-19 01:49:31,507 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 105 predicate places. [2024-11-19 01:49:31,507 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 159 transitions, 1656 flow [2024-11-19 01:49:31,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:31,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:31,507 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:31,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:31,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 01:49:31,708 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:31,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:31,708 INFO L85 PathProgramCache]: Analyzing trace with hash -890510467, now seen corresponding path program 14 times [2024-11-19 01:49:31,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:31,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352826877] [2024-11-19 01:49:31,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:49:31,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:31,731 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:31,731 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:32,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:32,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352826877] [2024-11-19 01:49:32,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352826877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:32,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724071079] [2024-11-19 01:49:32,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:49:32,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:32,275 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:32,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 01:49:32,335 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:32,335 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:32,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 01:49:32,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:32,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:32,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:32,610 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 35 treesize of output 43 [2024-11-19 01:49:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:32,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724071079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:32,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:32,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 27 [2024-11-19 01:49:32,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497025708] [2024-11-19 01:49:32,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:32,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-19 01:49:32,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:32,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-19 01:49:32,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2024-11-19 01:49:32,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:32,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 159 transitions, 1656 flow. Second operand has 28 states, 28 states have (on average 5.928571428571429) internal successors, (166), 28 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:32,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:32,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:32,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:33,601 INFO L124 PetriNetUnfolderBase]: 860/1555 cut-off events. [2024-11-19 01:49:33,601 INFO L125 PetriNetUnfolderBase]: For 9058/9068 co-relation queries the response was YES. [2024-11-19 01:49:33,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8307 conditions, 1555 events. 860/1555 cut-off events. For 9058/9068 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8063 event pairs, 28 based on Foata normal form. 7/1560 useless extension candidates. Maximal degree in co-relation 8241. Up to 871 conditions per place. [2024-11-19 01:49:33,611 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 185 selfloop transitions, 89 changer transitions 1/284 dead transitions. [2024-11-19 01:49:33,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 284 transitions, 3194 flow [2024-11-19 01:49:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 01:49:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-19 01:49:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 206 transitions. [2024-11-19 01:49:33,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-11-19 01:49:33,613 INFO L175 Difference]: Start difference. First operand has 130 places, 159 transitions, 1656 flow. Second operand 21 states and 206 transitions. [2024-11-19 01:49:33,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 284 transitions, 3194 flow [2024-11-19 01:49:33,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 284 transitions, 3127 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 01:49:33,632 INFO L231 Difference]: Finished difference. Result has 151 places, 191 transitions, 2213 flow [2024-11-19 01:49:33,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2213, PETRI_PLACES=151, PETRI_TRANSITIONS=191} [2024-11-19 01:49:33,633 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 126 predicate places. [2024-11-19 01:49:33,633 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 191 transitions, 2213 flow [2024-11-19 01:49:33,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.928571428571429) internal successors, (166), 28 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:33,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:33,633 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:33,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 01:49:33,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:33,837 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:33,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:33,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1990867275, now seen corresponding path program 15 times [2024-11-19 01:49:33,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:33,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863302949] [2024-11-19 01:49:33,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:49:33,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:33,854 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:49:33,854 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:34,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:34,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863302949] [2024-11-19 01:49:34,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863302949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:34,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805974047] [2024-11-19 01:49:34,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:49:34,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:34,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:34,513 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:34,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 01:49:34,574 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:49:34,575 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:34,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-19 01:49:34,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:34,596 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 19 treesize of output 1 [2024-11-19 01:49:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 01:49:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 01:49:35,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:35,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 41 [2024-11-19 01:49:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:35,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:35,736 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 65 treesize of output 57 [2024-11-19 01:49:35,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:35,767 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 434 treesize of output 318 [2024-11-19 01:49:36,331 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:36,351 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-19 01:49:36,362 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:36,369 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:36,569 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:37,043 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-19 01:49:37,056 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:37,076 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:37,117 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:37,138 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:37,154 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-19 01:49:37,166 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:37,192 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:37,231 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:37,270 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:38,352 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:39,218 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-19 01:49:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:39,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805974047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:39,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:39,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 44 [2024-11-19 01:49:39,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85154101] [2024-11-19 01:49:39,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:39,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-19 01:49:39,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-19 01:49:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1707, Unknown=0, NotChecked=0, Total=1980 [2024-11-19 01:49:39,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-19 01:49:39,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 191 transitions, 2213 flow. Second operand has 45 states, 45 states have (on average 4.622222222222222) internal successors, (208), 45 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:39,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:39,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-19 01:49:39,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:41,260 INFO L124 PetriNetUnfolderBase]: 1657/2764 cut-off events. [2024-11-19 01:49:41,260 INFO L125 PetriNetUnfolderBase]: For 18925/18925 co-relation queries the response was YES. [2024-11-19 01:49:41,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15868 conditions, 2764 events. 1657/2764 cut-off events. For 18925/18925 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14435 event pairs, 54 based on Foata normal form. 1/2765 useless extension candidates. Maximal degree in co-relation 15794. Up to 1466 conditions per place. [2024-11-19 01:49:41,279 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 172 selfloop transitions, 254 changer transitions 4/431 dead transitions. [2024-11-19 01:49:41,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 431 transitions, 5223 flow [2024-11-19 01:49:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-19 01:49:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-19 01:49:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 301 transitions. [2024-11-19 01:49:41,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3300438596491228 [2024-11-19 01:49:41,281 INFO L175 Difference]: Start difference. First operand has 151 places, 191 transitions, 2213 flow. Second operand 38 states and 301 transitions. [2024-11-19 01:49:41,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 431 transitions, 5223 flow [2024-11-19 01:49:41,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 431 transitions, 4955 flow, removed 103 selfloop flow, removed 8 redundant places. [2024-11-19 01:49:41,325 INFO L231 Difference]: Finished difference. Result has 193 places, 341 transitions, 4599 flow [2024-11-19 01:49:41,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4599, PETRI_PLACES=193, PETRI_TRANSITIONS=341} [2024-11-19 01:49:41,326 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 168 predicate places. [2024-11-19 01:49:41,326 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 341 transitions, 4599 flow [2024-11-19 01:49:41,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.622222222222222) internal successors, (208), 45 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:41,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:41,326 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:41,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 01:49:41,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:41,527 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:41,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:41,528 INFO L85 PathProgramCache]: Analyzing trace with hash -869264249, now seen corresponding path program 16 times [2024-11-19 01:49:41,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:41,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359398342] [2024-11-19 01:49:41,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:49:41,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:41,547 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:49:41,551 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:41,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:41,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359398342] [2024-11-19 01:49:41,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359398342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:41,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459293975] [2024-11-19 01:49:41,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:49:41,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:41,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:41,993 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:41,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 01:49:42,053 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:49:42,053 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:42,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 01:49:42,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:42,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:42,316 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:42,316 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 35 treesize of output 43 [2024-11-19 01:49:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:42,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459293975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:42,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:42,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2024-11-19 01:49:42,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071553990] [2024-11-19 01:49:42,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:42,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-19 01:49:42,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:42,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-19 01:49:42,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2024-11-19 01:49:42,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:42,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 341 transitions, 4599 flow. Second operand has 28 states, 28 states have (on average 5.857142857142857) internal successors, (164), 28 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:42,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:42,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:42,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:43,401 INFO L124 PetriNetUnfolderBase]: 1812/3173 cut-off events. [2024-11-19 01:49:43,401 INFO L125 PetriNetUnfolderBase]: For 31636/31732 co-relation queries the response was YES. [2024-11-19 01:49:43,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21952 conditions, 3173 events. 1812/3173 cut-off events. For 31636/31732 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18552 event pairs, 106 based on Foata normal form. 16/3157 useless extension candidates. Maximal degree in co-relation 21892. Up to 2214 conditions per place. [2024-11-19 01:49:43,426 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 390 selfloop transitions, 132 changer transitions 1/545 dead transitions. [2024-11-19 01:49:43,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 545 transitions, 7923 flow [2024-11-19 01:49:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 01:49:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-19 01:49:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 256 transitions. [2024-11-19 01:49:43,428 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-11-19 01:49:43,428 INFO L175 Difference]: Start difference. First operand has 193 places, 341 transitions, 4599 flow. Second operand 25 states and 256 transitions. [2024-11-19 01:49:43,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 545 transitions, 7923 flow [2024-11-19 01:49:43,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 545 transitions, 7368 flow, removed 220 selfloop flow, removed 13 redundant places. [2024-11-19 01:49:43,544 INFO L231 Difference]: Finished difference. Result has 205 places, 427 transitions, 5715 flow [2024-11-19 01:49:43,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4306, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5715, PETRI_PLACES=205, PETRI_TRANSITIONS=427} [2024-11-19 01:49:43,545 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 180 predicate places. [2024-11-19 01:49:43,545 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 427 transitions, 5715 flow [2024-11-19 01:49:43,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.857142857142857) internal successors, (164), 28 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:43,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:43,545 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:43,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:43,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:43,746 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:43,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1150821493, now seen corresponding path program 17 times [2024-11-19 01:49:43,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:43,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659461573] [2024-11-19 01:49:43,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:49:43,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:43,769 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:49:43,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:44,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:44,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659461573] [2024-11-19 01:49:44,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659461573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:44,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155841245] [2024-11-19 01:49:44,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:49:44,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:44,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:44,176 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:44,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 01:49:44,244 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:49:44,245 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:44,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 01:49:44,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:44,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:44,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:44,553 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 35 treesize of output 43 [2024-11-19 01:49:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:44,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155841245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:44,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:44,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 26 [2024-11-19 01:49:44,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94111510] [2024-11-19 01:49:44,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:44,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 01:49:44,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:44,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 01:49:44,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2024-11-19 01:49:44,809 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-19 01:49:44,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 427 transitions, 5715 flow. Second operand has 27 states, 27 states have (on average 6.888888888888889) internal successors, (186), 27 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:44,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:44,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-19 01:49:44,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:45,714 INFO L124 PetriNetUnfolderBase]: 1794/3246 cut-off events. [2024-11-19 01:49:45,714 INFO L125 PetriNetUnfolderBase]: For 36698/36790 co-relation queries the response was YES. [2024-11-19 01:49:45,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23017 conditions, 3246 events. 1794/3246 cut-off events. For 36698/36790 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 20010 event pairs, 97 based on Foata normal form. 22/3208 useless extension candidates. Maximal degree in co-relation 21993. Up to 2190 conditions per place. [2024-11-19 01:49:45,742 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 319 selfloop transitions, 114 changer transitions 1/493 dead transitions. [2024-11-19 01:49:45,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 493 transitions, 7215 flow [2024-11-19 01:49:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 01:49:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 01:49:45,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 169 transitions. [2024-11-19 01:49:45,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41421568627450983 [2024-11-19 01:49:45,744 INFO L175 Difference]: Start difference. First operand has 205 places, 427 transitions, 5715 flow. Second operand 17 states and 169 transitions. [2024-11-19 01:49:45,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 493 transitions, 7215 flow [2024-11-19 01:49:45,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 493 transitions, 7093 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-11-19 01:49:45,855 INFO L231 Difference]: Finished difference. Result has 220 places, 446 transitions, 6193 flow [2024-11-19 01:49:45,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6193, PETRI_PLACES=220, PETRI_TRANSITIONS=446} [2024-11-19 01:49:45,856 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 195 predicate places. [2024-11-19 01:49:45,856 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 446 transitions, 6193 flow [2024-11-19 01:49:45,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.888888888888889) internal successors, (186), 27 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:45,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:45,856 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:45,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:46,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:46,061 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:46,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:46,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1108538301, now seen corresponding path program 18 times [2024-11-19 01:49:46,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:46,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211042534] [2024-11-19 01:49:46,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:49:46,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:46,077 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 01:49:46,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:46,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:46,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211042534] [2024-11-19 01:49:46,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211042534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:46,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410827396] [2024-11-19 01:49:46,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:49:46,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:46,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:46,546 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:46,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 01:49:46,610 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 01:49:46,610 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:46,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-19 01:49:46,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:46,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 01:49:46,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:46,893 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 15 treesize of output 14 [2024-11-19 01:49:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:46,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:47,301 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 33 treesize of output 29 [2024-11-19 01:49:47,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:47,308 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 68 treesize of output 56 [2024-11-19 01:49:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:47,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410827396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:47,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:47,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2024-11-19 01:49:47,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221795756] [2024-11-19 01:49:47,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:47,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-19 01:49:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-19 01:49:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 01:49:47,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:49:47,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 446 transitions, 6193 flow. Second operand has 40 states, 40 states have (on average 5.65) internal successors, (226), 40 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:47,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:47,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:49:47,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:49,229 INFO L124 PetriNetUnfolderBase]: 2404/4185 cut-off events. [2024-11-19 01:49:49,229 INFO L125 PetriNetUnfolderBase]: For 46451/46577 co-relation queries the response was YES. [2024-11-19 01:49:49,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30084 conditions, 4185 events. 2404/4185 cut-off events. For 46451/46577 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 26004 event pairs, 86 based on Foata normal form. 47/4202 useless extension candidates. Maximal degree in co-relation 29754. Up to 2046 conditions per place. [2024-11-19 01:49:49,265 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 250 selfloop transitions, 365 changer transitions 3/640 dead transitions. [2024-11-19 01:49:49,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 640 transitions, 9691 flow [2024-11-19 01:49:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 01:49:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-19 01:49:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 285 transitions. [2024-11-19 01:49:49,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37109375 [2024-11-19 01:49:49,267 INFO L175 Difference]: Start difference. First operand has 220 places, 446 transitions, 6193 flow. Second operand 32 states and 285 transitions. [2024-11-19 01:49:49,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 640 transitions, 9691 flow [2024-11-19 01:49:49,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 640 transitions, 9438 flow, removed 77 selfloop flow, removed 9 redundant places. [2024-11-19 01:49:49,417 INFO L231 Difference]: Finished difference. Result has 250 places, 546 transitions, 8748 flow [2024-11-19 01:49:49,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5980, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8748, PETRI_PLACES=250, PETRI_TRANSITIONS=546} [2024-11-19 01:49:49,417 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 225 predicate places. [2024-11-19 01:49:49,417 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 546 transitions, 8748 flow [2024-11-19 01:49:49,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.65) internal successors, (226), 40 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:49,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:49,418 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:49,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:49,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-19 01:49:49,618 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:49,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1371816373, now seen corresponding path program 19 times [2024-11-19 01:49:49,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:49,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123262317] [2024-11-19 01:49:49,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:49:49,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:50,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:50,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123262317] [2024-11-19 01:49:50,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123262317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:50,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513282689] [2024-11-19 01:49:50,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:49:50,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:50,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:50,099 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:50,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 01:49:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:49:50,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 01:49:50,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:50,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:50,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:50,453 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 35 treesize of output 43 [2024-11-19 01:49:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:50,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513282689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:50,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:50,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-11-19 01:49:50,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57530306] [2024-11-19 01:49:50,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:50,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 01:49:50,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:50,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 01:49:50,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-19 01:49:50,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-19 01:49:50,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 546 transitions, 8748 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:50,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:50,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-19 01:49:50,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:52,059 INFO L124 PetriNetUnfolderBase]: 3053/5080 cut-off events. [2024-11-19 01:49:52,059 INFO L125 PetriNetUnfolderBase]: For 65305/65305 co-relation queries the response was YES. [2024-11-19 01:49:52,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39079 conditions, 5080 events. 3053/5080 cut-off events. For 65305/65305 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 30402 event pairs, 147 based on Foata normal form. 1/5081 useless extension candidates. Maximal degree in co-relation 38757. Up to 3047 conditions per place. [2024-11-19 01:49:52,104 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 375 selfloop transitions, 336 changer transitions 3/715 dead transitions. [2024-11-19 01:49:52,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 715 transitions, 12377 flow [2024-11-19 01:49:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 01:49:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-19 01:49:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 226 transitions. [2024-11-19 01:49:52,105 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2024-11-19 01:49:52,105 INFO L175 Difference]: Start difference. First operand has 250 places, 546 transitions, 8748 flow. Second operand 25 states and 226 transitions. [2024-11-19 01:49:52,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 715 transitions, 12377 flow [2024-11-19 01:49:52,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 715 transitions, 11427 flow, removed 326 selfloop flow, removed 19 redundant places. [2024-11-19 01:49:52,438 INFO L231 Difference]: Finished difference. Result has 261 places, 598 transitions, 10045 flow [2024-11-19 01:49:52,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7906, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10045, PETRI_PLACES=261, PETRI_TRANSITIONS=598} [2024-11-19 01:49:52,439 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 236 predicate places. [2024-11-19 01:49:52,439 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 598 transitions, 10045 flow [2024-11-19 01:49:52,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:52,439 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:52,439 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:52,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:52,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-19 01:49:52,639 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:52,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:52,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1020084101, now seen corresponding path program 20 times [2024-11-19 01:49:52,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:52,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645306949] [2024-11-19 01:49:52,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:49:52,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:52,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:52,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:53,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:53,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645306949] [2024-11-19 01:49:53,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645306949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:53,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9356781] [2024-11-19 01:49:53,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:49:53,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:53,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:53,067 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:53,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-19 01:49:53,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:49:53,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:53,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-19 01:49:53,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:49:53,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:53,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:53,408 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 35 treesize of output 43 [2024-11-19 01:49:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:49:53,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9356781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:53,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:53,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 29 [2024-11-19 01:49:53,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318945480] [2024-11-19 01:49:53,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:53,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-19 01:49:53,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-19 01:49:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2024-11-19 01:49:53,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-19 01:49:53,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 598 transitions, 10045 flow. Second operand has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:53,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:53,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-19 01:49:53,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:49:55,028 INFO L124 PetriNetUnfolderBase]: 3411/5669 cut-off events. [2024-11-19 01:49:55,028 INFO L125 PetriNetUnfolderBase]: For 79838/79838 co-relation queries the response was YES. [2024-11-19 01:49:55,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45886 conditions, 5669 events. 3411/5669 cut-off events. For 79838/79838 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 34640 event pairs, 136 based on Foata normal form. 1/5670 useless extension candidates. Maximal degree in co-relation 45580. Up to 3727 conditions per place. [2024-11-19 01:49:55,089 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 464 selfloop transitions, 342 changer transitions 1/808 dead transitions. [2024-11-19 01:49:55,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 808 transitions, 14796 flow [2024-11-19 01:49:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 01:49:55,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 01:49:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 180 transitions. [2024-11-19 01:49:55,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2024-11-19 01:49:55,091 INFO L175 Difference]: Start difference. First operand has 261 places, 598 transitions, 10045 flow. Second operand 19 states and 180 transitions. [2024-11-19 01:49:55,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 808 transitions, 14796 flow [2024-11-19 01:49:55,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 808 transitions, 14333 flow, removed 139 selfloop flow, removed 17 redundant places. [2024-11-19 01:49:55,487 INFO L231 Difference]: Finished difference. Result has 268 places, 693 transitions, 12821 flow [2024-11-19 01:49:55,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9626, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12821, PETRI_PLACES=268, PETRI_TRANSITIONS=693} [2024-11-19 01:49:55,488 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 243 predicate places. [2024-11-19 01:49:55,488 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 693 transitions, 12821 flow [2024-11-19 01:49:55,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:55,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:49:55,488 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:49:55,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-19 01:49:55,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:55,689 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:49:55,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:49:55,689 INFO L85 PathProgramCache]: Analyzing trace with hash 109006109, now seen corresponding path program 21 times [2024-11-19 01:49:55,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:49:55,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783380350] [2024-11-19 01:49:55,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:49:55,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:49:55,711 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:49:55,711 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:56,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:49:56,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783380350] [2024-11-19 01:49:56,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783380350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:49:56,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510033298] [2024-11-19 01:49:56,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:49:56,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:49:56,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:49:56,284 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:49:56,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-19 01:49:56,346 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:49:56,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:49:56,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-19 01:49:56,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:49:56,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 01:49:56,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:56,616 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 15 treesize of output 14 [2024-11-19 01:49:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:56,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:49:57,020 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 33 treesize of output 29 [2024-11-19 01:49:57,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:49:57,025 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 68 treesize of output 56 [2024-11-19 01:49:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:49:57,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510033298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:49:57,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:49:57,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 44 [2024-11-19 01:49:57,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507174242] [2024-11-19 01:49:57,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:49:57,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-19 01:49:57,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:49:57,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-19 01:49:57,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1660, Unknown=0, NotChecked=0, Total=1980 [2024-11-19 01:49:57,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-19 01:49:57,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 693 transitions, 12821 flow. Second operand has 45 states, 45 states have (on average 4.622222222222222) internal successors, (208), 45 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:49:57,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:49:57,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-19 01:49:57,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:00,151 INFO L124 PetriNetUnfolderBase]: 3861/6420 cut-off events. [2024-11-19 01:50:00,151 INFO L125 PetriNetUnfolderBase]: For 106463/106463 co-relation queries the response was YES. [2024-11-19 01:50:00,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55452 conditions, 6420 events. 3861/6420 cut-off events. For 106463/106463 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40253 event pairs, 107 based on Foata normal form. 1/6421 useless extension candidates. Maximal degree in co-relation 55128. Up to 2985 conditions per place. [2024-11-19 01:50:00,222 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 348 selfloop transitions, 675 changer transitions 4/1028 dead transitions. [2024-11-19 01:50:00,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1028 transitions, 19847 flow [2024-11-19 01:50:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-19 01:50:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-11-19 01:50:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 406 transitions. [2024-11-19 01:50:00,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32532051282051283 [2024-11-19 01:50:00,224 INFO L175 Difference]: Start difference. First operand has 268 places, 693 transitions, 12821 flow. Second operand 52 states and 406 transitions. [2024-11-19 01:50:00,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1028 transitions, 19847 flow [2024-11-19 01:50:00,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1028 transitions, 19513 flow, removed 129 selfloop flow, removed 6 redundant places. [2024-11-19 01:50:00,727 INFO L231 Difference]: Finished difference. Result has 331 places, 887 transitions, 18619 flow [2024-11-19 01:50:00,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=12512, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=18619, PETRI_PLACES=331, PETRI_TRANSITIONS=887} [2024-11-19 01:50:00,728 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 306 predicate places. [2024-11-19 01:50:00,728 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 887 transitions, 18619 flow [2024-11-19 01:50:00,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.622222222222222) internal successors, (208), 45 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:00,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:00,728 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:00,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-19 01:50:00,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:00,929 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:50:00,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:00,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1048384121, now seen corresponding path program 22 times [2024-11-19 01:50:00,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:00,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587520345] [2024-11-19 01:50:00,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:50:00,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:00,944 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:50:00,944 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:01,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:01,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587520345] [2024-11-19 01:50:01,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587520345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:01,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937160664] [2024-11-19 01:50:01,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:50:01,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:01,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:01,398 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:50:01,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-19 01:50:01,454 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:50:01,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:01,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 01:50:01,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:50:01,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:01,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:50:01,719 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 35 treesize of output 43 [2024-11-19 01:50:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:50:01,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937160664] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:01,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:01,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2024-11-19 01:50:01,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337541236] [2024-11-19 01:50:01,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:01,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-19 01:50:01,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-19 01:50:01,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2024-11-19 01:50:01,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:50:01,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 887 transitions, 18619 flow. Second operand has 28 states, 28 states have (on average 5.857142857142857) internal successors, (164), 28 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:01,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:01,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:50:01,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:06,208 INFO L124 PetriNetUnfolderBase]: 5620/9541 cut-off events. [2024-11-19 01:50:06,208 INFO L125 PetriNetUnfolderBase]: For 228352/229020 co-relation queries the response was YES. [2024-11-19 01:50:06,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96783 conditions, 9541 events. 5620/9541 cut-off events. For 228352/229020 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 65389 event pairs, 131 based on Foata normal form. 239/9749 useless extension candidates. Maximal degree in co-relation 96473. Up to 5185 conditions per place. [2024-11-19 01:50:06,304 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 1006 selfloop transitions, 616 changer transitions 1/1699 dead transitions. [2024-11-19 01:50:06,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1699 transitions, 38325 flow [2024-11-19 01:50:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-19 01:50:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-19 01:50:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 488 transitions. [2024-11-19 01:50:06,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-11-19 01:50:06,307 INFO L175 Difference]: Start difference. First operand has 331 places, 887 transitions, 18619 flow. Second operand 48 states and 488 transitions. [2024-11-19 01:50:06,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1699 transitions, 38325 flow [2024-11-19 01:50:07,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1699 transitions, 36291 flow, removed 850 selfloop flow, removed 24 redundant places. [2024-11-19 01:50:07,736 INFO L231 Difference]: Finished difference. Result has 375 places, 1445 transitions, 32031 flow [2024-11-19 01:50:07,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=17580, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=32031, PETRI_PLACES=375, PETRI_TRANSITIONS=1445} [2024-11-19 01:50:07,737 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 350 predicate places. [2024-11-19 01:50:07,737 INFO L471 AbstractCegarLoop]: Abstraction has has 375 places, 1445 transitions, 32031 flow [2024-11-19 01:50:07,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.857142857142857) internal successors, (164), 28 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:07,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:07,737 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:07,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-19 01:50:07,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 01:50:07,938 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:50:07,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash -686518265, now seen corresponding path program 23 times [2024-11-19 01:50:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:07,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749605807] [2024-11-19 01:50:07,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:50:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:07,947 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:50:07,947 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:50:08,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:08,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749605807] [2024-11-19 01:50:08,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749605807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:08,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773367411] [2024-11-19 01:50:08,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:50:08,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:08,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:08,094 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:50:08,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-19 01:50:08,159 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:50:08,159 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:08,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-19 01:50:08,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:08,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 01:50:08,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 01:50:08,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:50:08,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 33 [2024-11-19 01:50:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:08,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:09,038 INFO L349 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2024-11-19 01:50:09,038 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 34 treesize of output 33 [2024-11-19 01:50:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:50:09,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773367411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:09,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:09,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 12] total 32 [2024-11-19 01:50:09,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086754343] [2024-11-19 01:50:09,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:09,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-19 01:50:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:09,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-19 01:50:09,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=922, Unknown=1, NotChecked=0, Total=1056 [2024-11-19 01:50:09,121 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-19 01:50:09,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1445 transitions, 32031 flow. Second operand has 33 states, 33 states have (on average 4.878787878787879) internal successors, (161), 33 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:09,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:09,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-19 01:50:09,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:18,979 INFO L124 PetriNetUnfolderBase]: 10051/16214 cut-off events. [2024-11-19 01:50:18,979 INFO L125 PetriNetUnfolderBase]: For 402157/402157 co-relation queries the response was YES. [2024-11-19 01:50:19,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169469 conditions, 16214 events. 10051/16214 cut-off events. For 402157/402157 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 109755 event pairs, 137 based on Foata normal form. 2/16216 useless extension candidates. Maximal degree in co-relation 168657. Up to 6219 conditions per place. [2024-11-19 01:50:19,331 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 1159 selfloop transitions, 1885 changer transitions 9/3054 dead transitions. [2024-11-19 01:50:19,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 3054 transitions, 72328 flow [2024-11-19 01:50:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-19 01:50:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2024-11-19 01:50:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 705 transitions. [2024-11-19 01:50:19,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3338068181818182 [2024-11-19 01:50:19,333 INFO L175 Difference]: Start difference. First operand has 375 places, 1445 transitions, 32031 flow. Second operand 88 states and 705 transitions. [2024-11-19 01:50:19,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 3054 transitions, 72328 flow [2024-11-19 01:50:23,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 3054 transitions, 67637 flow, removed 2308 selfloop flow, removed 11 redundant places. [2024-11-19 01:50:23,504 INFO L231 Difference]: Finished difference. Result has 508 places, 2595 transitions, 62159 flow [2024-11-19 01:50:23,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=29214, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=896, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=62159, PETRI_PLACES=508, PETRI_TRANSITIONS=2595} [2024-11-19 01:50:23,506 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 483 predicate places. [2024-11-19 01:50:23,506 INFO L471 AbstractCegarLoop]: Abstraction has has 508 places, 2595 transitions, 62159 flow [2024-11-19 01:50:23,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.878787878787879) internal successors, (161), 33 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:23,506 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:23,506 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:23,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-19 01:50:23,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 01:50:23,707 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:50:23,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:23,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1656916081, now seen corresponding path program 24 times [2024-11-19 01:50:23,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:23,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651053066] [2024-11-19 01:50:23,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:50:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:23,734 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 01:50:23,738 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:24,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:24,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651053066] [2024-11-19 01:50:24,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651053066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:24,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922454827] [2024-11-19 01:50:24,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:50:24,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:24,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:24,234 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:50:24,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-19 01:50:24,303 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 01:50:24,303 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:24,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-19 01:50:24,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:24,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 01:50:24,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:50:24,534 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 15 treesize of output 14 [2024-11-19 01:50:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:24,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:24,950 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 33 treesize of output 29 [2024-11-19 01:50:24,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:50:24,966 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 68 treesize of output 56 [2024-11-19 01:50:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:25,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922454827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:25,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:25,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2024-11-19 01:50:25,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340308392] [2024-11-19 01:50:25,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:25,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 01:50:25,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:25,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 01:50:25,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 01:50:25,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:50:25,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 2595 transitions, 62159 flow. Second operand has 38 states, 38 states have (on average 5.657894736842105) internal successors, (215), 38 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:25,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:25,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:50:25,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:33,644 INFO L124 PetriNetUnfolderBase]: 9252/15383 cut-off events. [2024-11-19 01:50:33,644 INFO L125 PetriNetUnfolderBase]: For 534428/535365 co-relation queries the response was YES. [2024-11-19 01:50:33,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180955 conditions, 15383 events. 9252/15383 cut-off events. For 534428/535365 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 109032 event pairs, 97 based on Foata normal form. 304/15663 useless extension candidates. Maximal degree in co-relation 180048. Up to 9744 conditions per place. [2024-11-19 01:50:33,945 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 1523 selfloop transitions, 1102 changer transitions 5/2774 dead transitions. [2024-11-19 01:50:33,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 2774 transitions, 71126 flow [2024-11-19 01:50:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 01:50:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-19 01:50:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 191 transitions. [2024-11-19 01:50:33,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39791666666666664 [2024-11-19 01:50:33,950 INFO L175 Difference]: Start difference. First operand has 508 places, 2595 transitions, 62159 flow. Second operand 20 states and 191 transitions. [2024-11-19 01:50:33,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 2774 transitions, 71126 flow [2024-11-19 01:50:42,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 2774 transitions, 66777 flow, removed 2112 selfloop flow, removed 11 redundant places. [2024-11-19 01:50:42,340 INFO L231 Difference]: Finished difference. Result has 520 places, 2679 transitions, 64485 flow [2024-11-19 01:50:42,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=58132, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=64485, PETRI_PLACES=520, PETRI_TRANSITIONS=2679} [2024-11-19 01:50:42,343 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 495 predicate places. [2024-11-19 01:50:42,343 INFO L471 AbstractCegarLoop]: Abstraction has has 520 places, 2679 transitions, 64485 flow [2024-11-19 01:50:42,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.657894736842105) internal successors, (215), 38 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:42,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:42,343 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:42,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-19 01:50:42,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-19 01:50:42,544 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:50:42,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1608034401, now seen corresponding path program 25 times [2024-11-19 01:50:42,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:42,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095476874] [2024-11-19 01:50:42,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:50:42,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:42,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:42,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095476874] [2024-11-19 01:50:42,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095476874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:42,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872091196] [2024-11-19 01:50:42,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:50:42,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:42,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:42,955 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:50:42,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-19 01:50:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:43,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 01:50:43,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:50:43,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:43,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:50:43,248 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 35 treesize of output 43 [2024-11-19 01:50:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:50:43,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872091196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:43,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:43,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-11-19 01:50:43,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965332658] [2024-11-19 01:50:43,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:43,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 01:50:43,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:43,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 01:50:43,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2024-11-19 01:50:43,417 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-19 01:50:43,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 2679 transitions, 64485 flow. Second operand has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:43,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:43,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-19 01:50:43,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand