./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d 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-more-sorted.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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:31:35,505 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:31:35,593 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:31:35,597 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:31:35,598 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:31:35,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:31:35,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:31:35,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:31:35,632 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:31:35,633 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:31:35,634 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:31:35,634 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:31:35,634 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:31:35,635 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:31:35,636 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:31:35,636 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:31:35,637 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:31:35,637 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:31:35,637 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:31:35,637 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:31:35,638 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:31:35,640 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:31:35,641 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:31:35,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:31:35,641 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:31:35,641 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:31:35,642 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:31:35,642 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:31:35,642 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:31:35,643 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:31:35,643 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:31:35,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:31:35,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:31:35,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:31:35,644 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:31:35,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:31:35,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:31:35,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:31:35,645 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:31:35,645 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:31:35,645 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:31:35,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:31:35,646 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2024-11-16 19:31:35,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:31:35,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:31:35,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:31:35,931 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:31:35,931 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:31:35,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2024-11-16 19:31:37,324 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:31:37,535 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:31:37,537 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2024-11-16 19:31:37,546 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fdf0426/34215a49ddb54da1a79d491bd16e3f45/FLAG7512d0f93 [2024-11-16 19:31:37,889 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fdf0426/34215a49ddb54da1a79d491bd16e3f45 [2024-11-16 19:31:37,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:31:37,893 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:31:37,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:31:37,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:31:37,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:31:37,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:31:37" (1/1) ... [2024-11-16 19:31:37,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47dc7508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:37, skipping insertion in model container [2024-11-16 19:31:37,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:31:37" (1/1) ... [2024-11-16 19:31:37,929 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:31:38,195 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-more-sorted.wvr.c[2473,2486] [2024-11-16 19:31:38,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:31:38,214 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:31:38,234 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-more-sorted.wvr.c[2473,2486] [2024-11-16 19:31:38,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:31:38,252 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:31:38,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38 WrapperNode [2024-11-16 19:31:38,253 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:31:38,254 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:31:38,254 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:31:38,254 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:31:38,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,270 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,287 INFO L138 Inliner]: procedures = 23, calls = 22, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 89 [2024-11-16 19:31:38,288 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:31:38,289 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:31:38,289 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:31:38,289 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:31:38,297 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,300 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,317 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2024-11-16 19:31:38,318 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,318 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,328 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,329 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,331 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,333 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:31:38,334 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:31:38,335 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:31:38,335 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:31:38,335 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (1/1) ... [2024-11-16 19:31:38,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:31:38,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:38,390 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) [2024-11-16 19:31:38,397 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 [2024-11-16 19:31:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:31:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:31:38,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:31:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:31:38,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:31:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-16 19:31:38,443 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-16 19:31:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:31:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:31:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:31:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:31:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 19:31:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:31:38,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:31:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:31:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:31:38,446 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:31:38,558 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:31:38,561 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:31:38,802 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:31:38,802 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:31:39,030 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:31:39,030 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:31:39,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:31:39 BoogieIcfgContainer [2024-11-16 19:31:39,030 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:31:39,033 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:31:39,033 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:31:39,038 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:31:39,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:31:37" (1/3) ... [2024-11-16 19:31:39,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4527be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:31:39, skipping insertion in model container [2024-11-16 19:31:39,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:31:38" (2/3) ... [2024-11-16 19:31:39,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4527be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:31:39, skipping insertion in model container [2024-11-16 19:31:39,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:31:39" (3/3) ... [2024-11-16 19:31:39,045 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2024-11-16 19:31:39,061 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:31:39,061 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:31:39,061 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:31:39,120 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-16 19:31:39,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 99 flow [2024-11-16 19:31:39,193 INFO L124 PetriNetUnfolderBase]: 8/36 cut-off events. [2024-11-16 19:31:39,194 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-16 19:31:39,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 8/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-11-16 19:31:39,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 39 transitions, 99 flow [2024-11-16 19:31:39,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 35 transitions, 88 flow [2024-11-16 19:31:39,214 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:31:39,224 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;@3f29704e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:31:39,224 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-16 19:31:39,242 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:31:39,242 INFO L124 PetriNetUnfolderBase]: 8/34 cut-off events. [2024-11-16 19:31:39,242 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-16 19:31:39,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:39,247 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:39,248 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:39,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:39,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1316658436, now seen corresponding path program 1 times [2024-11-16 19:31:39,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:39,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967297798] [2024-11-16 19:31:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:39,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:39,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967297798] [2024-11-16 19:31:39,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967297798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:31:39,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:31:39,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:31:39,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383734830] [2024-11-16 19:31:39,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:39,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:31:39,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:31:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:31:39,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-11-16 19:31:39,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 88 flow. Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:39,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:39,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-11-16 19:31:39,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:39,647 INFO L124 PetriNetUnfolderBase]: 200/343 cut-off events. [2024-11-16 19:31:39,647 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-16 19:31:39,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 343 events. 200/343 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1236 event pairs, 124 based on Foata normal form. 76/403 useless extension candidates. Maximal degree in co-relation 580. Up to 295 conditions per place. [2024-11-16 19:31:39,655 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 22 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2024-11-16 19:31:39,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 124 flow [2024-11-16 19:31:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:31:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:31:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2024-11-16 19:31:39,667 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-11-16 19:31:39,669 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 88 flow. Second operand 2 states and 50 transitions. [2024-11-16 19:31:39,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 124 flow [2024-11-16 19:31:39,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 112 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-16 19:31:39,676 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 68 flow [2024-11-16 19:31:39,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2024-11-16 19:31:39,682 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2024-11-16 19:31:39,684 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 68 flow [2024-11-16 19:31:39,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:39,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:39,685 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:39,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:31:39,686 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:39,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1700977878, now seen corresponding path program 1 times [2024-11-16 19:31:39,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:39,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257421674] [2024-11-16 19:31:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:39,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:40,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:40,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257421674] [2024-11-16 19:31:40,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257421674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:31:40,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:31:40,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:31:40,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591395006] [2024-11-16 19:31:40,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:40,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:31:40,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:31:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:31:40,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-11-16 19:31:40,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:40,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:40,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-11-16 19:31:40,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:40,166 INFO L124 PetriNetUnfolderBase]: 200/346 cut-off events. [2024-11-16 19:31:40,167 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-16 19:31:40,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 346 events. 200/346 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1227 event pairs, 124 based on Foata normal form. 1/329 useless extension candidates. Maximal degree in co-relation 656. Up to 296 conditions per place. [2024-11-16 19:31:40,171 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 22 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2024-11-16 19:31:40,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 122 flow [2024-11-16 19:31:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:31:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:31:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-11-16 19:31:40,174 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-11-16 19:31:40,174 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 68 flow. Second operand 4 states and 70 transitions. [2024-11-16 19:31:40,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 122 flow [2024-11-16 19:31:40,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:31:40,178 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 82 flow [2024-11-16 19:31:40,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-11-16 19:31:40,179 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2024-11-16 19:31:40,179 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 82 flow [2024-11-16 19:31:40,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:40,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:40,180 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:40,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:31:40,181 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:40,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:40,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1082135634, now seen corresponding path program 1 times [2024-11-16 19:31:40,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:40,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436951923] [2024-11-16 19:31:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:40,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:40,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:40,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436951923] [2024-11-16 19:31:40,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436951923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:31:40,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:31:40,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:31:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898640404] [2024-11-16 19:31:40,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:40,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:31:40,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:31:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:31:40,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-11-16 19:31:40,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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) [2024-11-16 19:31:40,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:40,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-11-16 19:31:40,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:40,726 INFO L124 PetriNetUnfolderBase]: 387/689 cut-off events. [2024-11-16 19:31:40,726 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-16 19:31:40,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 689 events. 387/689 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3250 event pairs, 124 based on Foata normal form. 1/674 useless extension candidates. Maximal degree in co-relation 1285. Up to 352 conditions per place. [2024-11-16 19:31:40,735 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 35 selfloop transitions, 4 changer transitions 1/49 dead transitions. [2024-11-16 19:31:40,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 201 flow [2024-11-16 19:31:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:31:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:31:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-11-16 19:31:40,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6495726495726496 [2024-11-16 19:31:40,738 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 82 flow. Second operand 3 states and 76 transitions. [2024-11-16 19:31:40,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 201 flow [2024-11-16 19:31:40,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 197 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-16 19:31:40,740 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 104 flow [2024-11-16 19:31:40,740 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-11-16 19:31:40,741 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2024-11-16 19:31:40,743 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 104 flow [2024-11-16 19:31:40,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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) [2024-11-16 19:31:40,743 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:40,743 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:40,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:31:40,744 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:40,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:40,745 INFO L85 PathProgramCache]: Analyzing trace with hash 436642365, now seen corresponding path program 1 times [2024-11-16 19:31:40,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:40,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974017804] [2024-11-16 19:31:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:40,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:40,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:40,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974017804] [2024-11-16 19:31:40,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974017804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:40,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873439820] [2024-11-16 19:31:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:40,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:40,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:40,904 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) [2024-11-16 19:31:40,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:31:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:41,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 19:31:41,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:41,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:41,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873439820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:31:41,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:31:41,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-16 19:31:41,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827662686] [2024-11-16 19:31:41,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:31:41,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 19:31:41,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:41,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 19:31:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:31:41,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-16 19:31:41,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 104 flow. Second operand has 12 states, 12 states have (on average 14.0) internal successors, (168), 12 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:41,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:41,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-16 19:31:41,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:41,700 INFO L124 PetriNetUnfolderBase]: 928/1567 cut-off events. [2024-11-16 19:31:41,701 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2024-11-16 19:31:41,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3469 conditions, 1567 events. 928/1567 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8471 event pairs, 389 based on Foata normal form. 46/1582 useless extension candidates. Maximal degree in co-relation 3463. Up to 568 conditions per place. [2024-11-16 19:31:41,710 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 69 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2024-11-16 19:31:41,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 85 transitions, 409 flow [2024-11-16 19:31:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 19:31:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-16 19:31:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-11-16 19:31:41,713 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-11-16 19:31:41,713 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 104 flow. Second operand 8 states and 150 transitions. [2024-11-16 19:31:41,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 85 transitions, 409 flow [2024-11-16 19:31:41,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 85 transitions, 398 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:31:41,715 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 164 flow [2024-11-16 19:31:41,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-16 19:31:41,716 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2024-11-16 19:31:41,717 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 164 flow [2024-11-16 19:31:41,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.0) internal successors, (168), 12 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:41,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:41,717 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:41,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:31:41,921 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 [2024-11-16 19:31:41,922 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:41,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1606181911, now seen corresponding path program 1 times [2024-11-16 19:31:41,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:41,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774100198] [2024-11-16 19:31:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:41,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:42,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:42,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774100198] [2024-11-16 19:31:42,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774100198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:42,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132182362] [2024-11-16 19:31:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:42,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:42,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:42,080 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) [2024-11-16 19:31:42,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:31:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:42,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 19:31:42,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:42,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:42,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132182362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:31:42,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:31:42,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-16 19:31:42,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447260410] [2024-11-16 19:31:42,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:31:42,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 19:31:42,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:42,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 19:31:42,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-16 19:31:42,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-16 19:31:42,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 164 flow. Second operand has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 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) [2024-11-16 19:31:42,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:42,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-16 19:31:42,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:42,765 INFO L124 PetriNetUnfolderBase]: 822/1417 cut-off events. [2024-11-16 19:31:42,765 INFO L125 PetriNetUnfolderBase]: For 1012/1012 co-relation queries the response was YES. [2024-11-16 19:31:42,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3378 conditions, 1417 events. 822/1417 cut-off events. For 1012/1012 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7740 event pairs, 369 based on Foata normal form. 41/1442 useless extension candidates. Maximal degree in co-relation 3368. Up to 568 conditions per place. [2024-11-16 19:31:42,774 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 63 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2024-11-16 19:31:42,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 80 transitions, 431 flow [2024-11-16 19:31:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 19:31:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-16 19:31:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-11-16 19:31:42,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-11-16 19:31:42,776 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 164 flow. Second operand 8 states and 146 transitions. [2024-11-16 19:31:42,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 80 transitions, 431 flow [2024-11-16 19:31:42,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 425 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-16 19:31:42,779 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 199 flow [2024-11-16 19:31:42,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=199, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-16 19:31:42,781 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 20 predicate places. [2024-11-16 19:31:42,782 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 199 flow [2024-11-16 19:31:42,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 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) [2024-11-16 19:31:42,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:42,782 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:42,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 19:31:42,983 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 [2024-11-16 19:31:42,983 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:42,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1585133101, now seen corresponding path program 1 times [2024-11-16 19:31:42,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:42,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871652343] [2024-11-16 19:31:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:43,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871652343] [2024-11-16 19:31:43,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871652343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432966984] [2024-11-16 19:31:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:43,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:43,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:43,103 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) [2024-11-16 19:31:43,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:31:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:43,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 19:31:43,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:43,319 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:43,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432966984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:31:43,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:31:43,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-16 19:31:43,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742269204] [2024-11-16 19:31:43,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:31:43,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:31:43,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:43,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:31:43,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:31:43,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-16 19:31:43,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 199 flow. Second operand has 13 states, 13 states have (on average 13.076923076923077) internal successors, (170), 13 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:43,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:43,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-16 19:31:43,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:43,747 INFO L124 PetriNetUnfolderBase]: 654/1087 cut-off events. [2024-11-16 19:31:43,747 INFO L125 PetriNetUnfolderBase]: For 1368/1368 co-relation queries the response was YES. [2024-11-16 19:31:43,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3006 conditions, 1087 events. 654/1087 cut-off events. For 1368/1368 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5427 event pairs, 333 based on Foata normal form. 22/1091 useless extension candidates. Maximal degree in co-relation 2993. Up to 568 conditions per place. [2024-11-16 19:31:43,755 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 35 selfloop transitions, 5 changer transitions 27/74 dead transitions. [2024-11-16 19:31:43,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 74 transitions, 441 flow [2024-11-16 19:31:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 19:31:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-16 19:31:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-11-16 19:31:43,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-11-16 19:31:43,758 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 199 flow. Second operand 8 states and 141 transitions. [2024-11-16 19:31:43,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 74 transitions, 441 flow [2024-11-16 19:31:43,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 426 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-16 19:31:43,764 INFO L231 Difference]: Finished difference. Result has 63 places, 36 transitions, 154 flow [2024-11-16 19:31:43,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=154, PETRI_PLACES=63, PETRI_TRANSITIONS=36} [2024-11-16 19:31:43,765 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 26 predicate places. [2024-11-16 19:31:43,765 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 36 transitions, 154 flow [2024-11-16 19:31:43,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.076923076923077) internal successors, (170), 13 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:43,766 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:43,766 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:43,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 19:31:43,966 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 [2024-11-16 19:31:43,968 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:43,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:43,968 INFO L85 PathProgramCache]: Analyzing trace with hash 715199729, now seen corresponding path program 2 times [2024-11-16 19:31:43,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:43,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6708659] [2024-11-16 19:31:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:43,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:44,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:44,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6708659] [2024-11-16 19:31:44,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6708659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:44,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195931266] [2024-11-16 19:31:44,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:31:44,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:44,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:44,181 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) [2024-11-16 19:31:44,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:31:44,267 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:31:44,267 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:44,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:31:44,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:44,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:44,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195931266] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:44,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:31:44,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 16 [2024-11-16 19:31:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142474301] [2024-11-16 19:31:44,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:44,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 19:31:44,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 19:31:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-16 19:31:44,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-16 19:31:44,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 36 transitions, 154 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-11-16 19:31:44,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:44,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-16 19:31:44,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:44,865 INFO L124 PetriNetUnfolderBase]: 916/1440 cut-off events. [2024-11-16 19:31:44,865 INFO L125 PetriNetUnfolderBase]: For 1559/1559 co-relation queries the response was YES. [2024-11-16 19:31:44,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4124 conditions, 1440 events. 916/1440 cut-off events. For 1559/1559 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7133 event pairs, 231 based on Foata normal form. 26/1453 useless extension candidates. Maximal degree in co-relation 4108. Up to 592 conditions per place. [2024-11-16 19:31:44,877 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 78 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2024-11-16 19:31:44,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 593 flow [2024-11-16 19:31:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:31:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:31:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-11-16 19:31:44,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.441025641025641 [2024-11-16 19:31:44,879 INFO L175 Difference]: Start difference. First operand has 63 places, 36 transitions, 154 flow. Second operand 10 states and 172 transitions. [2024-11-16 19:31:44,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 593 flow [2024-11-16 19:31:44,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 99 transitions, 477 flow, removed 25 selfloop flow, removed 17 redundant places. [2024-11-16 19:31:44,887 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 213 flow [2024-11-16 19:31:44,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=213, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-11-16 19:31:44,888 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2024-11-16 19:31:44,888 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 213 flow [2024-11-16 19:31:44,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-11-16 19:31:44,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:44,889 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:44,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 19:31:45,089 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 [2024-11-16 19:31:45,090 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:45,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash 27966961, now seen corresponding path program 3 times [2024-11-16 19:31:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:45,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084270672] [2024-11-16 19:31:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:45,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:45,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084270672] [2024-11-16 19:31:45,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084270672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:45,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031742438] [2024-11-16 19:31:45,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:31:45,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:45,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:45,219 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) [2024-11-16 19:31:45,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:31:45,306 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:31:45,306 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:45,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:31:45,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:31:45,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:31:45,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031742438] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:31:45,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:31:45,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-16 19:31:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32756981] [2024-11-16 19:31:45,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:31:45,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 19:31:45,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 19:31:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-16 19:31:45,506 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-11-16 19:31:45,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 213 flow. Second operand has 15 states, 15 states have (on average 11.0) internal successors, (165), 15 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:45,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:45,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-11-16 19:31:45,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:46,359 INFO L124 PetriNetUnfolderBase]: 1919/3011 cut-off events. [2024-11-16 19:31:46,359 INFO L125 PetriNetUnfolderBase]: For 4251/4251 co-relation queries the response was YES. [2024-11-16 19:31:46,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8758 conditions, 3011 events. 1919/3011 cut-off events. For 4251/4251 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16593 event pairs, 332 based on Foata normal form. 32/3032 useless extension candidates. Maximal degree in co-relation 8746. Up to 808 conditions per place. [2024-11-16 19:31:46,381 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 102 selfloop transitions, 66 changer transitions 0/173 dead transitions. [2024-11-16 19:31:46,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 173 transitions, 1138 flow [2024-11-16 19:31:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:31:46,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:31:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 262 transitions. [2024-11-16 19:31:46,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3951734539969834 [2024-11-16 19:31:46,384 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 213 flow. Second operand 17 states and 262 transitions. [2024-11-16 19:31:46,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 173 transitions, 1138 flow [2024-11-16 19:31:46,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 173 transitions, 1133 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-16 19:31:46,392 INFO L231 Difference]: Finished difference. Result has 73 places, 109 transitions, 822 flow [2024-11-16 19:31:46,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=822, PETRI_PLACES=73, PETRI_TRANSITIONS=109} [2024-11-16 19:31:46,393 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 36 predicate places. [2024-11-16 19:31:46,393 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 109 transitions, 822 flow [2024-11-16 19:31:46,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.0) internal successors, (165), 15 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:46,394 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:46,394 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:46,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 19:31:46,598 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 [2024-11-16 19:31:46,599 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:46,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1832608033, now seen corresponding path program 4 times [2024-11-16 19:31:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:46,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986704666] [2024-11-16 19:31:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:46,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:46,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:46,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986704666] [2024-11-16 19:31:46,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986704666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:46,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835247665] [2024-11-16 19:31:46,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:31:46,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:46,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:46,724 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) [2024-11-16 19:31:46,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 19:31:46,809 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:31:46,809 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:46,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:31:46,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:46,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:47,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835247665] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:47,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:31:47,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2024-11-16 19:31:47,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858521055] [2024-11-16 19:31:47,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:47,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 19:31:47,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:47,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 19:31:47,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-16 19:31:47,081 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-16 19:31:47,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 109 transitions, 822 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-11-16 19:31:47,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:47,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-16 19:31:47,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:47,492 INFO L124 PetriNetUnfolderBase]: 1474/2370 cut-off events. [2024-11-16 19:31:47,492 INFO L125 PetriNetUnfolderBase]: For 8655/8693 co-relation queries the response was YES. [2024-11-16 19:31:47,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9177 conditions, 2370 events. 1474/2370 cut-off events. For 8655/8693 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13454 event pairs, 389 based on Foata normal form. 50/2392 useless extension candidates. Maximal degree in co-relation 9157. Up to 1320 conditions per place. [2024-11-16 19:31:47,512 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 90 selfloop transitions, 62 changer transitions 0/158 dead transitions. [2024-11-16 19:31:47,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 158 transitions, 1448 flow [2024-11-16 19:31:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 19:31:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-16 19:31:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-11-16 19:31:47,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-11-16 19:31:47,513 INFO L175 Difference]: Start difference. First operand has 73 places, 109 transitions, 822 flow. Second operand 8 states and 132 transitions. [2024-11-16 19:31:47,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 158 transitions, 1448 flow [2024-11-16 19:31:47,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 158 transitions, 1417 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-11-16 19:31:47,531 INFO L231 Difference]: Finished difference. Result has 79 places, 128 transitions, 1179 flow [2024-11-16 19:31:47,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1179, PETRI_PLACES=79, PETRI_TRANSITIONS=128} [2024-11-16 19:31:47,532 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2024-11-16 19:31:47,532 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 128 transitions, 1179 flow [2024-11-16 19:31:47,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-11-16 19:31:47,532 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:47,532 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:47,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 19:31:47,736 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 [2024-11-16 19:31:47,737 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:47,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:47,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1138019467, now seen corresponding path program 5 times [2024-11-16 19:31:47,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:47,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329707021] [2024-11-16 19:31:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:47,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:47,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:47,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329707021] [2024-11-16 19:31:47,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329707021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476752690] [2024-11-16 19:31:47,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:31:47,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:47,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:47,873 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) [2024-11-16 19:31:47,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 19:31:47,960 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-16 19:31:47,961 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:47,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:31:47,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:31:48,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:31:48,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476752690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:31:48,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:31:48,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-16 19:31:48,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976572332] [2024-11-16 19:31:48,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:31:48,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 19:31:48,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 19:31:48,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-16 19:31:48,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-11-16 19:31:48,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 128 transitions, 1179 flow. Second operand has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 14 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:48,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:48,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-11-16 19:31:48,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:48,984 INFO L124 PetriNetUnfolderBase]: 1934/3033 cut-off events. [2024-11-16 19:31:48,984 INFO L125 PetriNetUnfolderBase]: For 14980/14997 co-relation queries the response was YES. [2024-11-16 19:31:48,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12828 conditions, 3033 events. 1934/3033 cut-off events. For 14980/14997 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16467 event pairs, 280 based on Foata normal form. 46/3060 useless extension candidates. Maximal degree in co-relation 12805. Up to 703 conditions per place. [2024-11-16 19:31:49,013 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 137 selfloop transitions, 76 changer transitions 0/218 dead transitions. [2024-11-16 19:31:49,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 218 transitions, 2127 flow [2024-11-16 19:31:49,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:31:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:31:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 257 transitions. [2024-11-16 19:31:49,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38763197586727 [2024-11-16 19:31:49,015 INFO L175 Difference]: Start difference. First operand has 79 places, 128 transitions, 1179 flow. Second operand 17 states and 257 transitions. [2024-11-16 19:31:49,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 218 transitions, 2127 flow [2024-11-16 19:31:49,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 218 transitions, 2037 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-11-16 19:31:49,044 INFO L231 Difference]: Finished difference. Result has 101 places, 151 transitions, 1621 flow [2024-11-16 19:31:49,044 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1621, PETRI_PLACES=101, PETRI_TRANSITIONS=151} [2024-11-16 19:31:49,045 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 64 predicate places. [2024-11-16 19:31:49,045 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 151 transitions, 1621 flow [2024-11-16 19:31:49,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 14 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:49,045 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:49,046 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:49,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 19:31:49,246 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 [2024-11-16 19:31:49,247 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:49,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash -263050279, now seen corresponding path program 6 times [2024-11-16 19:31:49,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:49,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486562900] [2024-11-16 19:31:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:49,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:49,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:49,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486562900] [2024-11-16 19:31:49,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486562900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:49,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879156250] [2024-11-16 19:31:49,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:31:49,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:49,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:49,401 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) [2024-11-16 19:31:49,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 19:31:49,490 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-16 19:31:49,490 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:49,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:31:49,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:49,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:49,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879156250] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:49,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:31:49,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 17 [2024-11-16 19:31:49,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490956615] [2024-11-16 19:31:49,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:49,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 19:31:49,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:49,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 19:31:49,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-16 19:31:49,726 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-16 19:31:49,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 151 transitions, 1621 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-11-16 19:31:49,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:49,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-16 19:31:49,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:50,212 INFO L124 PetriNetUnfolderBase]: 1423/2331 cut-off events. [2024-11-16 19:31:50,213 INFO L125 PetriNetUnfolderBase]: For 18128/18142 co-relation queries the response was YES. [2024-11-16 19:31:50,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 2331 events. 1423/2331 cut-off events. For 18128/18142 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13377 event pairs, 423 based on Foata normal form. 28/2331 useless extension candidates. Maximal degree in co-relation 11267. Up to 1355 conditions per place. [2024-11-16 19:31:50,234 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 108 selfloop transitions, 80 changer transitions 0/194 dead transitions. [2024-11-16 19:31:50,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 194 transitions, 2339 flow [2024-11-16 19:31:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:31:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:31:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-11-16 19:31:50,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42450142450142453 [2024-11-16 19:31:50,236 INFO L175 Difference]: Start difference. First operand has 101 places, 151 transitions, 1621 flow. Second operand 9 states and 149 transitions. [2024-11-16 19:31:50,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 194 transitions, 2339 flow [2024-11-16 19:31:50,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 194 transitions, 2312 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-16 19:31:50,274 INFO L231 Difference]: Finished difference. Result has 108 places, 158 transitions, 1943 flow [2024-11-16 19:31:50,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1943, PETRI_PLACES=108, PETRI_TRANSITIONS=158} [2024-11-16 19:31:50,275 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 71 predicate places. [2024-11-16 19:31:50,275 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 158 transitions, 1943 flow [2024-11-16 19:31:50,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-11-16 19:31:50,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:50,275 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:50,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-16 19:31:50,477 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 [2024-11-16 19:31:50,478 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:50,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1623709553, now seen corresponding path program 7 times [2024-11-16 19:31:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:50,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147217223] [2024-11-16 19:31:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:50,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:50,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:50,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147217223] [2024-11-16 19:31:50,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147217223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:50,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339481895] [2024-11-16 19:31:50,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:31:50,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:50,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:50,603 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) [2024-11-16 19:31:50,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 19:31:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:50,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:31:50,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:50,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:50,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339481895] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:50,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:31:50,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2024-11-16 19:31:50,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421845030] [2024-11-16 19:31:50,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:50,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 19:31:50,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:50,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 19:31:50,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-11-16 19:31:50,924 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-16 19:31:50,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 158 transitions, 1943 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-11-16 19:31:50,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:50,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-16 19:31:50,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:51,330 INFO L124 PetriNetUnfolderBase]: 1322/2155 cut-off events. [2024-11-16 19:31:51,330 INFO L125 PetriNetUnfolderBase]: For 20570/20592 co-relation queries the response was YES. [2024-11-16 19:31:51,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11084 conditions, 2155 events. 1322/2155 cut-off events. For 20570/20592 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12019 event pairs, 465 based on Foata normal form. 34/2139 useless extension candidates. Maximal degree in co-relation 11048. Up to 1319 conditions per place. [2024-11-16 19:31:51,357 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 106 selfloop transitions, 72 changer transitions 0/184 dead transitions. [2024-11-16 19:31:51,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 184 transitions, 2482 flow [2024-11-16 19:31:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 19:31:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-16 19:31:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-11-16 19:31:51,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4198717948717949 [2024-11-16 19:31:51,359 INFO L175 Difference]: Start difference. First operand has 108 places, 158 transitions, 1943 flow. Second operand 8 states and 131 transitions. [2024-11-16 19:31:51,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 184 transitions, 2482 flow [2024-11-16 19:31:51,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 184 transitions, 2374 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-11-16 19:31:51,413 INFO L231 Difference]: Finished difference. Result has 113 places, 163 transitions, 2107 flow [2024-11-16 19:31:51,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2107, PETRI_PLACES=113, PETRI_TRANSITIONS=163} [2024-11-16 19:31:51,415 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 76 predicate places. [2024-11-16 19:31:51,416 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 163 transitions, 2107 flow [2024-11-16 19:31:51,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-11-16 19:31:51,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:51,416 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:51,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 19:31:51,617 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 [2024-11-16 19:31:51,617 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:51,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1955721993, now seen corresponding path program 2 times [2024-11-16 19:31:51,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:51,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036365111] [2024-11-16 19:31:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:51,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:51,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:51,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036365111] [2024-11-16 19:31:51,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036365111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:51,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144763790] [2024-11-16 19:31:51,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:31:51,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:51,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:51,713 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) [2024-11-16 19:31:51,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 19:31:51,800 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:31:51,801 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:51,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:31:51,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:31:51,860 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 19:31:51,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144763790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:31:51,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 19:31:51,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2024-11-16 19:31:51,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522752390] [2024-11-16 19:31:51,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:51,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:31:51,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:31:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-16 19:31:51,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-16 19:31:51,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 163 transitions, 2107 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:51,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:51,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-16 19:31:51,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:52,393 INFO L124 PetriNetUnfolderBase]: 2187/3529 cut-off events. [2024-11-16 19:31:52,393 INFO L125 PetriNetUnfolderBase]: For 36616/36962 co-relation queries the response was YES. [2024-11-16 19:31:52,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17909 conditions, 3529 events. 2187/3529 cut-off events. For 36616/36962 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21179 event pairs, 502 based on Foata normal form. 117/3575 useless extension candidates. Maximal degree in co-relation 17871. Up to 1587 conditions per place. [2024-11-16 19:31:52,435 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 292 selfloop transitions, 53 changer transitions 13/371 dead transitions. [2024-11-16 19:31:52,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 371 transitions, 5469 flow [2024-11-16 19:31:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 19:31:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-16 19:31:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-11-16 19:31:52,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-11-16 19:31:52,439 INFO L175 Difference]: Start difference. First operand has 113 places, 163 transitions, 2107 flow. Second operand 8 states and 167 transitions. [2024-11-16 19:31:52,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 371 transitions, 5469 flow [2024-11-16 19:31:52,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 371 transitions, 5172 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-11-16 19:31:52,571 INFO L231 Difference]: Finished difference. Result has 121 places, 204 transitions, 2753 flow [2024-11-16 19:31:52,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2753, PETRI_PLACES=121, PETRI_TRANSITIONS=204} [2024-11-16 19:31:52,573 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 84 predicate places. [2024-11-16 19:31:52,573 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 204 transitions, 2753 flow [2024-11-16 19:31:52,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:52,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:52,574 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:52,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 19:31:52,774 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 [2024-11-16 19:31:52,775 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:52,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1897640209, now seen corresponding path program 3 times [2024-11-16 19:31:52,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:52,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074847087] [2024-11-16 19:31:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:52,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:52,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074847087] [2024-11-16 19:31:52,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074847087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979355790] [2024-11-16 19:31:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:31:52,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:52,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:52,891 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) [2024-11-16 19:31:52,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 19:31:52,985 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:31:52,985 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:52,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:31:52,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:31:53,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:31:53,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979355790] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:53,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:31:53,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2024-11-16 19:31:53,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800926274] [2024-11-16 19:31:53,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:53,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:31:53,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:53,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:31:53,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:31:53,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-16 19:31:53,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 204 transitions, 2753 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:53,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:53,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-16 19:31:53,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:53,657 INFO L124 PetriNetUnfolderBase]: 2248/3714 cut-off events. [2024-11-16 19:31:53,657 INFO L125 PetriNetUnfolderBase]: For 37493/37755 co-relation queries the response was YES. [2024-11-16 19:31:53,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20176 conditions, 3714 events. 2248/3714 cut-off events. For 37493/37755 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23005 event pairs, 292 based on Foata normal form. 60/3730 useless extension candidates. Maximal degree in co-relation 20133. Up to 1423 conditions per place. [2024-11-16 19:31:53,701 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 194 selfloop transitions, 69 changer transitions 2/278 dead transitions. [2024-11-16 19:31:53,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 278 transitions, 3934 flow [2024-11-16 19:31:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:31:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:31:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-11-16 19:31:53,703 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-11-16 19:31:53,703 INFO L175 Difference]: Start difference. First operand has 121 places, 204 transitions, 2753 flow. Second operand 6 states and 123 transitions. [2024-11-16 19:31:53,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 278 transitions, 3934 flow [2024-11-16 19:31:53,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 278 transitions, 3897 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-11-16 19:31:53,782 INFO L231 Difference]: Finished difference. Result has 127 places, 209 transitions, 2967 flow [2024-11-16 19:31:53,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2967, PETRI_PLACES=127, PETRI_TRANSITIONS=209} [2024-11-16 19:31:53,783 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 90 predicate places. [2024-11-16 19:31:53,783 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 209 transitions, 2967 flow [2024-11-16 19:31:53,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:53,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:53,784 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:53,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-16 19:31:53,984 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 [2024-11-16 19:31:53,985 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:53,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:53,985 INFO L85 PathProgramCache]: Analyzing trace with hash 397925451, now seen corresponding path program 2 times [2024-11-16 19:31:53,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:53,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597009046] [2024-11-16 19:31:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:53,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:54,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:54,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597009046] [2024-11-16 19:31:54,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597009046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:54,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590548006] [2024-11-16 19:31:54,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:31:54,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:54,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:54,082 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) [2024-11-16 19:31:54,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 19:31:54,170 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:31:54,171 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:54,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:31:54,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:31:54,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:31:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590548006] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:54,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:31:54,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2024-11-16 19:31:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736453851] [2024-11-16 19:31:54,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:54,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:31:54,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:31:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:31:54,318 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-16 19:31:54,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 209 transitions, 2967 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:54,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:54,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-16 19:31:54,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:54,914 INFO L124 PetriNetUnfolderBase]: 2368/3876 cut-off events. [2024-11-16 19:31:54,915 INFO L125 PetriNetUnfolderBase]: For 45710/46028 co-relation queries the response was YES. [2024-11-16 19:31:54,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21935 conditions, 3876 events. 2368/3876 cut-off events. For 45710/46028 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24208 event pairs, 364 based on Foata normal form. 132/3944 useless extension candidates. Maximal degree in co-relation 21890. Up to 1313 conditions per place. [2024-11-16 19:31:54,957 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 185 selfloop transitions, 57 changer transitions 1/261 dead transitions. [2024-11-16 19:31:54,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 261 transitions, 3951 flow [2024-11-16 19:31:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:31:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:31:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-11-16 19:31:54,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2024-11-16 19:31:54,960 INFO L175 Difference]: Start difference. First operand has 127 places, 209 transitions, 2967 flow. Second operand 6 states and 118 transitions. [2024-11-16 19:31:54,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 261 transitions, 3951 flow [2024-11-16 19:31:55,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 261 transitions, 3840 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-16 19:31:55,037 INFO L231 Difference]: Finished difference. Result has 131 places, 212 transitions, 3075 flow [2024-11-16 19:31:55,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3075, PETRI_PLACES=131, PETRI_TRANSITIONS=212} [2024-11-16 19:31:55,037 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 94 predicate places. [2024-11-16 19:31:55,037 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 212 transitions, 3075 flow [2024-11-16 19:31:55,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:55,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:55,038 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:55,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-16 19:31:55,238 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 [2024-11-16 19:31:55,238 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:55,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:55,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1581712413, now seen corresponding path program 4 times [2024-11-16 19:31:55,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:55,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877994146] [2024-11-16 19:31:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:55,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:55,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877994146] [2024-11-16 19:31:55,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877994146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:55,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040009336] [2024-11-16 19:31:55,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:31:55,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:55,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:55,349 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) [2024-11-16 19:31:55,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 19:31:55,441 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:31:55,441 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:55,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:31:55,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:31:55,529 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 19:31:55,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040009336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:31:55,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 19:31:55,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2024-11-16 19:31:55,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451481816] [2024-11-16 19:31:55,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:55,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:31:55,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:31:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:31:55,541 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-16 19:31:55,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 212 transitions, 3075 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:55,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:55,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-16 19:31:55,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:56,331 INFO L124 PetriNetUnfolderBase]: 2993/4869 cut-off events. [2024-11-16 19:31:56,331 INFO L125 PetriNetUnfolderBase]: For 62731/63043 co-relation queries the response was YES. [2024-11-16 19:31:56,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28449 conditions, 4869 events. 2993/4869 cut-off events. For 62731/63043 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 31166 event pairs, 739 based on Foata normal form. 122/4902 useless extension candidates. Maximal degree in co-relation 28402. Up to 2530 conditions per place. [2024-11-16 19:31:56,465 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 245 selfloop transitions, 101 changer transitions 9/368 dead transitions. [2024-11-16 19:31:56,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 368 transitions, 5974 flow [2024-11-16 19:31:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:31:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:31:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-11-16 19:31:56,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-11-16 19:31:56,467 INFO L175 Difference]: Start difference. First operand has 131 places, 212 transitions, 3075 flow. Second operand 7 states and 141 transitions. [2024-11-16 19:31:56,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 368 transitions, 5974 flow [2024-11-16 19:31:56,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 368 transitions, 5827 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-16 19:31:56,672 INFO L231 Difference]: Finished difference. Result has 138 places, 270 transitions, 4266 flow [2024-11-16 19:31:56,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4266, PETRI_PLACES=138, PETRI_TRANSITIONS=270} [2024-11-16 19:31:56,673 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 101 predicate places. [2024-11-16 19:31:56,674 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 270 transitions, 4266 flow [2024-11-16 19:31:56,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:56,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:56,674 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:56,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-16 19:31:56,874 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 [2024-11-16 19:31:56,875 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:56,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1480287801, now seen corresponding path program 5 times [2024-11-16 19:31:56,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:56,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686176460] [2024-11-16 19:31:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:56,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:56,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:56,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686176460] [2024-11-16 19:31:56,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686176460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:56,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517487322] [2024-11-16 19:31:56,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:31:56,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:56,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:56,963 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) [2024-11-16 19:31:56,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 19:31:57,056 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-16 19:31:57,057 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:57,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 19:31:57,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:57,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:31:57,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517487322] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:57,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:31:57,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-11-16 19:31:57,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652854136] [2024-11-16 19:31:57,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:31:57,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:31:57,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:57,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:31:57,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:31:57,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-16 19:31:57,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 270 transitions, 4266 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:57,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:57,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-16 19:31:57,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:57,585 INFO L124 PetriNetUnfolderBase]: 1605/2726 cut-off events. [2024-11-16 19:31:57,585 INFO L125 PetriNetUnfolderBase]: For 42120/42378 co-relation queries the response was YES. [2024-11-16 19:31:57,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17088 conditions, 2726 events. 1605/2726 cut-off events. For 42120/42378 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16394 event pairs, 373 based on Foata normal form. 197/2830 useless extension candidates. Maximal degree in co-relation 17037. Up to 1570 conditions per place. [2024-11-16 19:31:57,611 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 165 selfloop transitions, 29 changer transitions 0/214 dead transitions. [2024-11-16 19:31:57,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 214 transitions, 3591 flow [2024-11-16 19:31:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:31:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:31:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-11-16 19:31:57,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-11-16 19:31:57,613 INFO L175 Difference]: Start difference. First operand has 138 places, 270 transitions, 4266 flow. Second operand 6 states and 99 transitions. [2024-11-16 19:31:57,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 214 transitions, 3591 flow [2024-11-16 19:31:57,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 214 transitions, 3305 flow, removed 116 selfloop flow, removed 7 redundant places. [2024-11-16 19:31:57,719 INFO L231 Difference]: Finished difference. Result has 130 places, 193 transitions, 2746 flow [2024-11-16 19:31:57,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2746, PETRI_PLACES=130, PETRI_TRANSITIONS=193} [2024-11-16 19:31:57,720 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 93 predicate places. [2024-11-16 19:31:57,720 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 193 transitions, 2746 flow [2024-11-16 19:31:57,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:31:57,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:57,720 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:57,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-16 19:31:57,921 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 [2024-11-16 19:31:57,921 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:57,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash 395895836, now seen corresponding path program 1 times [2024-11-16 19:31:57,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:57,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958286593] [2024-11-16 19:31:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:57,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:59,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:59,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958286593] [2024-11-16 19:31:59,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958286593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:59,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11877685] [2024-11-16 19:31:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:59,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:59,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:59,487 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) [2024-11-16 19:31:59,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-16 19:31:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:59,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-16 19:31:59,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:59,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:31:59,940 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 72 treesize of output 32 [2024-11-16 19:32:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:32:00,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:32:00,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:00,937 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 133 treesize of output 130 [2024-11-16 19:32:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:32:01,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11877685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:32:01,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:32:01,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-16 19:32:01,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912697961] [2024-11-16 19:32:01,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:32:01,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 19:32:01,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:01,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 19:32:01,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-11-16 19:32:01,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-11-16 19:32:01,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 193 transitions, 2746 flow. Second operand has 20 states, 20 states have (on average 15.1) internal successors, (302), 20 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:01,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:01,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-11-16 19:32:01,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:02,690 INFO L124 PetriNetUnfolderBase]: 1883/3317 cut-off events. [2024-11-16 19:32:02,690 INFO L125 PetriNetUnfolderBase]: For 38580/38945 co-relation queries the response was YES. [2024-11-16 19:32:02,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19030 conditions, 3317 events. 1883/3317 cut-off events. For 38580/38945 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21690 event pairs, 105 based on Foata normal form. 72/3332 useless extension candidates. Maximal degree in co-relation 18983. Up to 1842 conditions per place. [2024-11-16 19:32:02,727 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 236 selfloop transitions, 135 changer transitions 1/394 dead transitions. [2024-11-16 19:32:02,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 394 transitions, 6123 flow [2024-11-16 19:32:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:32:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:32:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-11-16 19:32:02,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-16 19:32:02,729 INFO L175 Difference]: Start difference. First operand has 130 places, 193 transitions, 2746 flow. Second operand 10 states and 208 transitions. [2024-11-16 19:32:02,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 394 transitions, 6123 flow [2024-11-16 19:32:02,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 394 transitions, 6053 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-16 19:32:02,796 INFO L231 Difference]: Finished difference. Result has 135 places, 277 transitions, 4580 flow [2024-11-16 19:32:02,796 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2680, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4580, PETRI_PLACES=135, PETRI_TRANSITIONS=277} [2024-11-16 19:32:02,796 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 98 predicate places. [2024-11-16 19:32:02,796 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 277 transitions, 4580 flow [2024-11-16 19:32:02,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.1) internal successors, (302), 20 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:02,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:02,797 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:02,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-16 19:32:02,997 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 [2024-11-16 19:32:02,997 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:32:02,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:02,998 INFO L85 PathProgramCache]: Analyzing trace with hash -356118564, now seen corresponding path program 2 times [2024-11-16 19:32:02,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:02,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576095095] [2024-11-16 19:32:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:02,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:03,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:03,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576095095] [2024-11-16 19:32:03,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576095095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:03,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897829534] [2024-11-16 19:32:03,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:32:03,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:32:03,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:32:03,982 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) [2024-11-16 19:32:03,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-16 19:32:04,102 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:32:04,102 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:32:04,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-16 19:32:04,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:32:04,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:04,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 31 [2024-11-16 19:32:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:32:04,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:32:05,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:05,009 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 147 treesize of output 132 [2024-11-16 19:32:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:32:05,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897829534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:32:05,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:32:05,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-11-16 19:32:05,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742638455] [2024-11-16 19:32:05,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:32:05,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 19:32:05,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:05,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 19:32:05,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-11-16 19:32:05,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-11-16 19:32:05,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 277 transitions, 4580 flow. Second operand has 16 states, 16 states have (on average 15.25) internal successors, (244), 16 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:05,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:05,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-11-16 19:32:05,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:06,657 INFO L124 PetriNetUnfolderBase]: 2127/3739 cut-off events. [2024-11-16 19:32:06,658 INFO L125 PetriNetUnfolderBase]: For 47688/48132 co-relation queries the response was YES. [2024-11-16 19:32:06,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22609 conditions, 3739 events. 2127/3739 cut-off events. For 47688/48132 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24918 event pairs, 175 based on Foata normal form. 86/3764 useless extension candidates. Maximal degree in co-relation 22561. Up to 2438 conditions per place. [2024-11-16 19:32:06,690 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 271 selfloop transitions, 131 changer transitions 1/425 dead transitions. [2024-11-16 19:32:06,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 425 transitions, 7474 flow [2024-11-16 19:32:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:32:06,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:32:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-11-16 19:32:06,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5102564102564102 [2024-11-16 19:32:06,691 INFO L175 Difference]: Start difference. First operand has 135 places, 277 transitions, 4580 flow. Second operand 10 states and 199 transitions. [2024-11-16 19:32:06,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 425 transitions, 7474 flow [2024-11-16 19:32:06,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 425 transitions, 7187 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-11-16 19:32:06,783 INFO L231 Difference]: Finished difference. Result has 144 places, 354 transitions, 6207 flow [2024-11-16 19:32:06,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4377, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6207, PETRI_PLACES=144, PETRI_TRANSITIONS=354} [2024-11-16 19:32:06,783 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 107 predicate places. [2024-11-16 19:32:06,784 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 354 transitions, 6207 flow [2024-11-16 19:32:06,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.25) internal successors, (244), 16 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:06,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:06,784 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:06,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-16 19:32:06,984 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 [2024-11-16 19:32:06,984 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:32:06,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash 605349556, now seen corresponding path program 1 times [2024-11-16 19:32:06,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:06,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032489878] [2024-11-16 19:32:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:06,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:08,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:08,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032489878] [2024-11-16 19:32:08,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032489878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:08,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327286875] [2024-11-16 19:32:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:08,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:32:08,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:32:08,200 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) [2024-11-16 19:32:08,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-16 19:32:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:08,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-16 19:32:08,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:32:08,357 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 [2024-11-16 19:32:08,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:08,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 31 [2024-11-16 19:32:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:08,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:32:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:32:10,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327286875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:32:10,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:32:10,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-11-16 19:32:10,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426806535] [2024-11-16 19:32:10,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:32:10,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 19:32:10,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 19:32:10,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-16 19:32:10,153 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-11-16 19:32:10,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 354 transitions, 6207 flow. Second operand has 22 states, 22 states have (on average 13.636363636363637) internal successors, (300), 22 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:10,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:10,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-11-16 19:32:10,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:11,586 INFO L124 PetriNetUnfolderBase]: 3012/5084 cut-off events. [2024-11-16 19:32:11,587 INFO L125 PetriNetUnfolderBase]: For 64402/64868 co-relation queries the response was YES. [2024-11-16 19:32:11,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31312 conditions, 5084 events. 3012/5084 cut-off events. For 64402/64868 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34242 event pairs, 275 based on Foata normal form. 37/5062 useless extension candidates. Maximal degree in co-relation 31259. Up to 3511 conditions per place. [2024-11-16 19:32:11,632 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 351 selfloop transitions, 145 changer transitions 2/512 dead transitions. [2024-11-16 19:32:11,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 512 transitions, 9081 flow [2024-11-16 19:32:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 19:32:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-16 19:32:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 325 transitions. [2024-11-16 19:32:11,634 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-11-16 19:32:11,635 INFO L175 Difference]: Start difference. First operand has 144 places, 354 transitions, 6207 flow. Second operand 18 states and 325 transitions. [2024-11-16 19:32:11,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 512 transitions, 9081 flow [2024-11-16 19:32:11,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 512 transitions, 8989 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-11-16 19:32:11,841 INFO L231 Difference]: Finished difference. Result has 166 places, 415 transitions, 7711 flow [2024-11-16 19:32:11,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6141, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7711, PETRI_PLACES=166, PETRI_TRANSITIONS=415} [2024-11-16 19:32:11,842 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 129 predicate places. [2024-11-16 19:32:11,842 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 415 transitions, 7711 flow [2024-11-16 19:32:11,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.636363636363637) internal successors, (300), 22 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:11,842 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:11,842 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:11,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-16 19:32:12,046 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 [2024-11-16 19:32:12,047 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:32:12,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1970823516, now seen corresponding path program 2 times [2024-11-16 19:32:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:12,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123538339] [2024-11-16 19:32:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:12,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:13,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123538339] [2024-11-16 19:32:13,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123538339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106057281] [2024-11-16 19:32:13,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:32:13,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:32:13,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:32:13,314 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) [2024-11-16 19:32:13,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-16 19:32:13,417 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:32:13,417 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:32:13,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:32:13,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:32:13,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:13,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-11-16 19:32:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:13,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:32:14,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:14,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 168 treesize of output 225 [2024-11-16 19:32:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106057281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:32:18,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:32:18,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2024-11-16 19:32:18,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730198332] [2024-11-16 19:32:18,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:32:18,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-16 19:32:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-16 19:32:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2024-11-16 19:32:19,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-16 19:32:19,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 415 transitions, 7711 flow. Second operand has 30 states, 30 states have (on average 11.5) internal successors, (345), 30 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:19,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:19,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-16 19:32:19,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:22,821 INFO L124 PetriNetUnfolderBase]: 9051/14817 cut-off events. [2024-11-16 19:32:22,822 INFO L125 PetriNetUnfolderBase]: For 204529/205109 co-relation queries the response was YES. [2024-11-16 19:32:22,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93878 conditions, 14817 events. 9051/14817 cut-off events. For 204529/205109 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 111383 event pairs, 694 based on Foata normal form. 119/14769 useless extension candidates. Maximal degree in co-relation 93816. Up to 5166 conditions per place. [2024-11-16 19:32:23,249 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 640 selfloop transitions, 495 changer transitions 1/1153 dead transitions. [2024-11-16 19:32:23,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1153 transitions, 22108 flow [2024-11-16 19:32:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 19:32:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-16 19:32:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 359 transitions. [2024-11-16 19:32:23,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46025641025641023 [2024-11-16 19:32:23,251 INFO L175 Difference]: Start difference. First operand has 166 places, 415 transitions, 7711 flow. Second operand 20 states and 359 transitions. [2024-11-16 19:32:23,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1153 transitions, 22108 flow [2024-11-16 19:32:24,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1153 transitions, 21799 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-11-16 19:32:24,621 INFO L231 Difference]: Finished difference. Result has 190 places, 847 transitions, 17184 flow [2024-11-16 19:32:24,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7591, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=17184, PETRI_PLACES=190, PETRI_TRANSITIONS=847} [2024-11-16 19:32:24,622 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 153 predicate places. [2024-11-16 19:32:24,622 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 847 transitions, 17184 flow [2024-11-16 19:32:24,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 11.5) internal successors, (345), 30 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:24,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:24,623 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:24,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-16 19:32:24,823 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 [2024-11-16 19:32:24,824 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:32:24,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash 732461232, now seen corresponding path program 3 times [2024-11-16 19:32:24,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:24,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676621122] [2024-11-16 19:32:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:26,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:26,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676621122] [2024-11-16 19:32:26,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676621122] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:26,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151784932] [2024-11-16 19:32:26,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:32:26,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:32:26,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:32:26,161 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) [2024-11-16 19:32:26,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-16 19:32:26,277 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:32:26,277 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:32:26,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-16 19:32:26,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:32:26,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 19:32:26,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:26,565 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 76 treesize of output 58 [2024-11-16 19:32:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:32:26,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:32:27,376 INFO L349 Elim1Store]: treesize reduction 32, result has 22.0 percent of original size [2024-11-16 19:32:27,377 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 149 treesize of output 104 [2024-11-16 19:32:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:32:27,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151784932] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:32:27,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:32:27,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 26 [2024-11-16 19:32:27,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601375456] [2024-11-16 19:32:27,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:32:27,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 19:32:27,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:27,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 19:32:27,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-11-16 19:32:27,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-16 19:32:27,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 847 transitions, 17184 flow. Second operand has 26 states, 26 states have (on average 11.846153846153847) internal successors, (308), 26 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:27,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:27,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-16 19:32:27,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:33,550 INFO L124 PetriNetUnfolderBase]: 11157/18090 cut-off events. [2024-11-16 19:32:33,550 INFO L125 PetriNetUnfolderBase]: For 300280/300965 co-relation queries the response was YES. [2024-11-16 19:32:33,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124002 conditions, 18090 events. 11157/18090 cut-off events. For 300280/300965 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 136688 event pairs, 537 based on Foata normal form. 196/18177 useless extension candidates. Maximal degree in co-relation 123930. Up to 9610 conditions per place. [2024-11-16 19:32:33,835 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 587 selfloop transitions, 899 changer transitions 59/1562 dead transitions. [2024-11-16 19:32:33,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 1562 transitions, 32143 flow [2024-11-16 19:32:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-16 19:32:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-16 19:32:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 630 transitions. [2024-11-16 19:32:33,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-11-16 19:32:33,838 INFO L175 Difference]: Start difference. First operand has 190 places, 847 transitions, 17184 flow. Second operand 36 states and 630 transitions. [2024-11-16 19:32:33,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 1562 transitions, 32143 flow [2024-11-16 19:32:35,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 1562 transitions, 31793 flow, removed 173 selfloop flow, removed 2 redundant places. [2024-11-16 19:32:35,962 INFO L231 Difference]: Finished difference. Result has 243 places, 1231 transitions, 27342 flow [2024-11-16 19:32:35,963 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=17004, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=27342, PETRI_PLACES=243, PETRI_TRANSITIONS=1231} [2024-11-16 19:32:35,963 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 206 predicate places. [2024-11-16 19:32:35,963 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 1231 transitions, 27342 flow [2024-11-16 19:32:35,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 11.846153846153847) internal successors, (308), 26 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:35,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:35,963 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:35,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-16 19:32:36,164 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 [2024-11-16 19:32:36,164 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:32:36,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:36,165 INFO L85 PathProgramCache]: Analyzing trace with hash -225134930, now seen corresponding path program 3 times [2024-11-16 19:32:36,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:36,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654195404] [2024-11-16 19:32:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:36,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:37,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:37,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654195404] [2024-11-16 19:32:37,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654195404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:37,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044280767] [2024-11-16 19:32:37,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:32:37,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:32:37,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:32:37,043 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) [2024-11-16 19:32:37,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-16 19:32:37,135 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:32:37,135 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:32:37,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-16 19:32:37,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:32:37,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:37,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 31 [2024-11-16 19:32:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:32:37,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:32:37,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:37,801 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 147 treesize of output 132 [2024-11-16 19:32:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:32:38,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044280767] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:32:38,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:32:38,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-11-16 19:32:38,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847951005] [2024-11-16 19:32:38,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:32:38,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 19:32:38,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 19:32:38,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-11-16 19:32:38,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-11-16 19:32:38,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 1231 transitions, 27342 flow. Second operand has 16 states, 16 states have (on average 15.25) internal successors, (244), 16 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:38,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:38,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-11-16 19:32:38,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:43,396 INFO L124 PetriNetUnfolderBase]: 9411/16013 cut-off events. [2024-11-16 19:32:43,396 INFO L125 PetriNetUnfolderBase]: For 322893/325219 co-relation queries the response was YES. [2024-11-16 19:32:43,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123193 conditions, 16013 events. 9411/16013 cut-off events. For 322893/325219 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 128304 event pairs, 545 based on Foata normal form. 577/16393 useless extension candidates. Maximal degree in co-relation 123100. Up to 11333 conditions per place. [2024-11-16 19:32:43,799 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 932 selfloop transitions, 338 changer transitions 1/1363 dead transitions. [2024-11-16 19:32:43,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1363 transitions, 31850 flow [2024-11-16 19:32:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:32:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:32:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-11-16 19:32:43,800 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.517948717948718 [2024-11-16 19:32:43,800 INFO L175 Difference]: Start difference. First operand has 243 places, 1231 transitions, 27342 flow. Second operand 10 states and 202 transitions. [2024-11-16 19:32:43,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1363 transitions, 31850 flow [2024-11-16 19:32:46,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1363 transitions, 30734 flow, removed 277 selfloop flow, removed 15 redundant places. [2024-11-16 19:32:46,953 INFO L231 Difference]: Finished difference. Result has 239 places, 1258 transitions, 27662 flow [2024-11-16 19:32:46,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=26268, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=893, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=27662, PETRI_PLACES=239, PETRI_TRANSITIONS=1258} [2024-11-16 19:32:46,954 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 202 predicate places. [2024-11-16 19:32:46,954 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 1258 transitions, 27662 flow [2024-11-16 19:32:46,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.25) internal successors, (244), 16 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:46,955 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:46,955 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:46,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-16 19:32:47,155 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 [2024-11-16 19:32:47,155 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:32:47,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:47,156 INFO L85 PathProgramCache]: Analyzing trace with hash 898125474, now seen corresponding path program 4 times [2024-11-16 19:32:47,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:47,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908706755] [2024-11-16 19:32:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:47,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:47,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:47,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908706755] [2024-11-16 19:32:47,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908706755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:47,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948675550] [2024-11-16 19:32:47,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:32:47,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:32:47,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:32:47,995 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) [2024-11-16 19:32:47,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-16 19:32:48,119 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:32:48,119 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:32:48,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-16 19:32:48,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:32:48,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:48,335 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 72 treesize of output 32 [2024-11-16 19:32:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:32:48,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:32:48,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:32:48,868 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 147 treesize of output 132 [2024-11-16 19:32:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:32:49,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948675550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:32:49,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:32:49,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-16 19:32:49,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718131773] [2024-11-16 19:32:49,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:32:49,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 19:32:49,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:49,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 19:32:49,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2024-11-16 19:32:49,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-11-16 19:32:49,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 1258 transitions, 27662 flow. Second operand has 20 states, 20 states have (on average 15.1) internal successors, (302), 20 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:32:49,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:49,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-11-16 19:32:49,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand