./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i -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 98246e94f9eda6f7b3e0bc779400b495c6030c5dbda65475908661a0361d920c --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:19:36,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:19:36,242 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:19:36,246 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:19:36,246 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:19:36,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:19:36,268 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:19:36,269 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:19:36,279 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:19:36,279 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:19:36,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:19:36,280 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:19:36,280 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:19:36,280 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:19:36,281 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:19:36,281 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:19:36,281 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:19:36,281 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:19:36,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:19:36,282 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:19:36,282 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:19:36,292 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:19:36,292 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:19:36,293 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:19:36,293 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:19:36,293 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:19:36,293 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:19:36,294 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:19:36,294 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:19:36,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:19:36,294 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:19:36,294 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:19:36,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:19:36,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:19:36,295 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:19:36,295 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:19:36,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:19:36,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:19:36,296 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:19:36,296 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:19:36,296 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:19:36,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:19:36,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:19:36,297 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98246e94f9eda6f7b3e0bc779400b495c6030c5dbda65475908661a0361d920c [2024-06-27 16:19:36,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:19:36,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:19:36,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:19:36,479 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:19:36,479 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:19:36,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2024-06-27 16:19:37,430 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:19:37,627 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:19:37,627 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2024-06-27 16:19:37,637 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cef0b590/8d119fe6c5d74dbd89ed00ffa5f6ac67/FLAG8a7a26643 [2024-06-27 16:19:37,646 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cef0b590/8d119fe6c5d74dbd89ed00ffa5f6ac67 [2024-06-27 16:19:37,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:19:37,650 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:19:37,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:19:37,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:19:37,657 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:19:37,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:19:37" (1/1) ... [2024-06-27 16:19:37,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64dae255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:37, skipping insertion in model container [2024-06-27 16:19:37,661 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:19:37" (1/1) ... [2024-06-27 16:19:37,726 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:19:38,016 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30453,30466] [2024-06-27 16:19:38,028 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:19:38,038 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:19:38,085 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30453,30466] [2024-06-27 16:19:38,092 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:19:38,125 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:19:38,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38 WrapperNode [2024-06-27 16:19:38,126 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:19:38,127 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:19:38,127 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:19:38,127 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:19:38,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,171 INFO L138 Inliner]: procedures = 170, calls = 24, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 101 [2024-06-27 16:19:38,173 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:19:38,179 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:19:38,179 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:19:38,179 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:19:38,188 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,190 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,201 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6]. The 1 writes are split as follows [0, 1]. [2024-06-27 16:19:38,202 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,206 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,209 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,211 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:19:38,212 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:19:38,212 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:19:38,212 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:19:38,213 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (1/1) ... [2024-06-27 16:19:38,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:19:38,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:19:38,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:19:38,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:19:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:19:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:19:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-27 16:19:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-27 16:19:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:19:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:19:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:19:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:19:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:19:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:19:38,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:19:38,288 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:19:38,371 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:19:38,373 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:19:38,503 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:19:38,504 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:19:38,603 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:19:38,604 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 16:19:38,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:19:38 BoogieIcfgContainer [2024-06-27 16:19:38,604 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:19:38,606 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:19:38,606 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:19:38,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:19:38,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:19:37" (1/3) ... [2024-06-27 16:19:38,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622d2ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:19:38, skipping insertion in model container [2024-06-27 16:19:38,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:19:38" (2/3) ... [2024-06-27 16:19:38,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622d2ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:19:38, skipping insertion in model container [2024-06-27 16:19:38,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:19:38" (3/3) ... [2024-06-27 16:19:38,612 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2024-06-27 16:19:38,620 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:19:38,627 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:19:38,627 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:19:38,627 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:19:38,655 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:19:38,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 21 transitions, 46 flow [2024-06-27 16:19:38,693 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2024-06-27 16:19:38,693 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:19:38,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 23 events. 3/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2024-06-27 16:19:38,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 21 transitions, 46 flow [2024-06-27 16:19:38,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 21 transitions, 46 flow [2024-06-27 16:19:38,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:19:38,709 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@420d0045, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:19:38,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:19:38,714 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:19:38,714 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2024-06-27 16:19:38,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:19:38,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:38,715 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-06-27 16:19:38,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 16:19:38,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:38,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1892792396, now seen corresponding path program 1 times [2024-06-27 16:19:38,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:38,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614074057] [2024-06-27 16:19:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:38,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:19:38,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:38,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614074057] [2024-06-27 16:19:38,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614074057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:19:38,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:19:38,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:19:39,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005149108] [2024-06-27 16:19:39,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:19:39,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:19:39,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:39,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:19:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:19:39,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-06-27 16:19:39,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:39,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:39,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-06-27 16:19:39,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:39,074 INFO L124 PetriNetUnfolderBase]: 20/61 cut-off events. [2024-06-27 16:19:39,074 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:19:39,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 61 events. 20/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 125 event pairs, 16 based on Foata normal form. 3/57 useless extension candidates. Maximal degree in co-relation 99. Up to 51 conditions per place. [2024-06-27 16:19:39,076 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 14 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2024-06-27 16:19:39,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 76 flow [2024-06-27 16:19:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:19:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:19:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-06-27 16:19:39,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-27 16:19:39,087 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 46 flow. Second operand 3 states and 31 transitions. [2024-06-27 16:19:39,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 76 flow [2024-06-27 16:19:39,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 20 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:19:39,090 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 54 flow [2024-06-27 16:19:39,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-06-27 16:19:39,094 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2024-06-27 16:19:39,094 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 54 flow [2024-06-27 16:19:39,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:39,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:39,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:39,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:19:39,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 16:19:39,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2055429442, now seen corresponding path program 1 times [2024-06-27 16:19:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:39,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713732339] [2024-06-27 16:19:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:19:39,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:39,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713732339] [2024-06-27 16:19:39,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713732339] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:19:39,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944764727] [2024-06-27 16:19:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:39,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:39,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:19:39,154 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:19:39,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:19:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:39,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 16:19:39,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:19:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:19:39,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:19:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:19:39,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944764727] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:19:39,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:19:39,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 16:19:39,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766653272] [2024-06-27 16:19:39,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:19:39,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:19:39,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:39,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:19:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:19:39,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-06-27 16:19:39,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:39,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:39,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-06-27 16:19:39,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:39,343 INFO L124 PetriNetUnfolderBase]: 20/64 cut-off events. [2024-06-27 16:19:39,343 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:19:39,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 64 events. 20/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 125 event pairs, 16 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 121. Up to 51 conditions per place. [2024-06-27 16:19:39,346 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 14 selfloop transitions, 5 changer transitions 0/23 dead transitions. [2024-06-27 16:19:39,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 104 flow [2024-06-27 16:19:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:19:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:19:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 46 transitions. [2024-06-27 16:19:39,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 16:19:39,348 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 54 flow. Second operand 6 states and 46 transitions. [2024-06-27 16:19:39,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 104 flow [2024-06-27 16:19:39,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 23 transitions, 100 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:19:39,350 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 86 flow [2024-06-27 16:19:39,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2024-06-27 16:19:39,351 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2024-06-27 16:19:39,351 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 86 flow [2024-06-27 16:19:39,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:39,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:39,352 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-06-27 16:19:39,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 16:19:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:39,564 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 16:19:39,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:39,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1183726388, now seen corresponding path program 2 times [2024-06-27 16:19:39,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:39,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922141733] [2024-06-27 16:19:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:39,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:19:39,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:39,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922141733] [2024-06-27 16:19:39,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922141733] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:19:39,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935591564] [2024-06-27 16:19:39,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:19:39,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:39,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:19:39,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:19:39,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:19:39,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:19:39,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:19:39,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:19:39,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:19:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:19:39,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:19:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:19:39,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935591564] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:19:39,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:19:39,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-06-27 16:19:39,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491511914] [2024-06-27 16:19:39,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:19:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:19:39,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:19:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:19:39,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-06-27 16:19:39,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 86 flow. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:39,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:39,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-06-27 16:19:39,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:39,834 INFO L124 PetriNetUnfolderBase]: 20/66 cut-off events. [2024-06-27 16:19:39,834 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-06-27 16:19:39,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 66 events. 20/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 125 event pairs, 16 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 112. Up to 51 conditions per place. [2024-06-27 16:19:39,835 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 14 selfloop transitions, 7 changer transitions 0/25 dead transitions. [2024-06-27 16:19:39,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 25 transitions, 140 flow [2024-06-27 16:19:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:19:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:19:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 55 transitions. [2024-06-27 16:19:39,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3273809523809524 [2024-06-27 16:19:39,839 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 86 flow. Second operand 8 states and 55 transitions. [2024-06-27 16:19:39,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 25 transitions, 140 flow [2024-06-27 16:19:39,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 25 transitions, 126 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:19:39,842 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 108 flow [2024-06-27 16:19:39,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2024-06-27 16:19:39,843 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2024-06-27 16:19:39,844 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 108 flow [2024-06-27 16:19:39,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:39,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:39,844 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-06-27 16:19:39,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:19:40,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-06-27 16:19:40,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 16:19:40,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:40,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1493306612, now seen corresponding path program 3 times [2024-06-27 16:19:40,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:40,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422046474] [2024-06-27 16:19:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:40,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:40,079 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:19:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:40,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:19:40,110 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:19:40,111 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-06-27 16:19:40,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-06-27 16:19:40,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-06-27 16:19:40,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:19:40,114 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-06-27 16:19:40,116 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:19:40,116 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 16:19:40,136 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:19:40,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 35 transitions, 80 flow [2024-06-27 16:19:40,150 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2024-06-27 16:19:40,150 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:19:40,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 5/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 67 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-06-27 16:19:40,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 35 transitions, 80 flow [2024-06-27 16:19:40,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 35 transitions, 80 flow [2024-06-27 16:19:40,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:19:40,155 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@420d0045, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:19:40,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:19:40,160 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:19:40,161 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2024-06-27 16:19:40,161 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:19:40,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:40,161 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-06-27 16:19:40,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:19:40,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:40,162 INFO L85 PathProgramCache]: Analyzing trace with hash -311274422, now seen corresponding path program 1 times [2024-06-27 16:19:40,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515889349] [2024-06-27 16:19:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:40,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:19:40,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:40,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515889349] [2024-06-27 16:19:40,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515889349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:19:40,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:19:40,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:19:40,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096505278] [2024-06-27 16:19:40,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:19:40,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:19:40,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:40,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:19:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:19:40,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:19:40,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:40,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:40,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:19:40,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:40,338 INFO L124 PetriNetUnfolderBase]: 434/847 cut-off events. [2024-06-27 16:19:40,338 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 16:19:40,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1588 conditions, 847 events. 434/847 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4010 event pairs, 376 based on Foata normal form. 54/795 useless extension candidates. Maximal degree in co-relation 963. Up to 708 conditions per place. [2024-06-27 16:19:40,343 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 24 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-06-27 16:19:40,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 128 flow [2024-06-27 16:19:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:19:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:19:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-06-27 16:19:40,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-27 16:19:40,345 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 80 flow. Second operand 3 states and 51 transitions. [2024-06-27 16:19:40,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 128 flow [2024-06-27 16:19:40,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:19:40,346 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 86 flow [2024-06-27 16:19:40,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=74, 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=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-06-27 16:19:40,347 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2024-06-27 16:19:40,347 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 86 flow [2024-06-27 16:19:40,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:40,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:40,347 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:40,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:19:40,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:19:40,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1717529851, now seen corresponding path program 1 times [2024-06-27 16:19:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:40,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231276078] [2024-06-27 16:19:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:40,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:19:40,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:40,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231276078] [2024-06-27 16:19:40,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231276078] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:19:40,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554811111] [2024-06-27 16:19:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:40,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:40,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:19:40,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:19:40,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:19:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:40,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 16:19:40,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:19:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:19:40,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:19:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:19:40,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554811111] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:19:40,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:19:40,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 16:19:40,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212075975] [2024-06-27 16:19:40,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:19:40,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:19:40,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:40,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:19:40,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:19:40,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:19:40,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:40,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:40,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:19:40,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:40,558 INFO L124 PetriNetUnfolderBase]: 434/850 cut-off events. [2024-06-27 16:19:40,558 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 16:19:40,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1604 conditions, 850 events. 434/850 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4010 event pairs, 376 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 1591. Up to 708 conditions per place. [2024-06-27 16:19:40,562 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 24 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-27 16:19:40,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 156 flow [2024-06-27 16:19:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:19:40,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:19:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-06-27 16:19:40,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-27 16:19:40,565 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 86 flow. Second operand 6 states and 74 transitions. [2024-06-27 16:19:40,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 156 flow [2024-06-27 16:19:40,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 152 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:19:40,567 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 118 flow [2024-06-27 16:19:40,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-27 16:19:40,569 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2024-06-27 16:19:40,569 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 118 flow [2024-06-27 16:19:40,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:40,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:40,569 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-06-27 16:19:40,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 16:19:40,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:40,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:19:40,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1280014474, now seen corresponding path program 2 times [2024-06-27 16:19:40,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:40,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011917949] [2024-06-27 16:19:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:40,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:19:40,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:40,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011917949] [2024-06-27 16:19:40,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011917949] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:19:40,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847332700] [2024-06-27 16:19:40,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:19:40,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:40,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:19:40,852 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:19:40,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:19:40,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:19:40,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:19:40,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:19:40,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:19:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:19:40,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:19:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:19:40,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847332700] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:19:40,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:19:40,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-06-27 16:19:40,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932240986] [2024-06-27 16:19:40,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:19:40,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:19:40,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:40,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:19:40,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:19:40,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:19:40,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 118 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:40,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:40,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:19:40,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:41,055 INFO L124 PetriNetUnfolderBase]: 434/852 cut-off events. [2024-06-27 16:19:41,055 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-27 16:19:41,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1625 conditions, 852 events. 434/852 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4009 event pairs, 376 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 1582. Up to 708 conditions per place. [2024-06-27 16:19:41,059 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 24 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2024-06-27 16:19:41,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 192 flow [2024-06-27 16:19:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:19:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:19:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-27 16:19:41,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31785714285714284 [2024-06-27 16:19:41,061 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 118 flow. Second operand 8 states and 89 transitions. [2024-06-27 16:19:41,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 192 flow [2024-06-27 16:19:41,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 38 transitions, 178 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:19:41,062 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 140 flow [2024-06-27 16:19:41,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=140, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2024-06-27 16:19:41,063 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2024-06-27 16:19:41,063 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 140 flow [2024-06-27 16:19:41,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:41,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:41,064 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-06-27 16:19:41,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:19:41,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:41,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:19:41,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash 406224554, now seen corresponding path program 3 times [2024-06-27 16:19:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:41,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514611124] [2024-06-27 16:19:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:41,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:41,288 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:19:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:41,299 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:19:41,299 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:19:41,299 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-06-27 16:19:41,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-06-27 16:19:41,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-06-27 16:19:41,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-06-27 16:19:41,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 16:19:41,300 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-06-27 16:19:41,301 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:19:41,301 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 16:19:41,316 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:19:41,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 49 transitions, 116 flow [2024-06-27 16:19:41,321 INFO L124 PetriNetUnfolderBase]: 7/57 cut-off events. [2024-06-27 16:19:41,322 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 16:19:41,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 7/57 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 45. Up to 4 conditions per place. [2024-06-27 16:19:41,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 49 transitions, 116 flow [2024-06-27 16:19:41,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 49 transitions, 116 flow [2024-06-27 16:19:41,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:19:41,323 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@420d0045, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:19:41,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:19:41,326 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:19:41,326 INFO L124 PetriNetUnfolderBase]: 2/36 cut-off events. [2024-06-27 16:19:41,326 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 16:19:41,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:41,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:41,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:19:41,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash -899183842, now seen corresponding path program 1 times [2024-06-27 16:19:41,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:41,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971841952] [2024-06-27 16:19:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:41,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:41,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:41,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971841952] [2024-06-27 16:19:41,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971841952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:19:41,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:19:41,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:19:41,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229069915] [2024-06-27 16:19:41,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:19:41,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:19:41,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:19:41,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:19:41,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 16:19:41,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:41,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:41,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 16:19:41,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:42,037 INFO L124 PetriNetUnfolderBase]: 6347/10150 cut-off events. [2024-06-27 16:19:42,038 INFO L125 PetriNetUnfolderBase]: For 581/581 co-relation queries the response was YES. [2024-06-27 16:19:42,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19316 conditions, 10150 events. 6347/10150 cut-off events. For 581/581 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 62839 event pairs, 5560 based on Foata normal form. 738/9615 useless extension candidates. Maximal degree in co-relation 3879. Up to 8808 conditions per place. [2024-06-27 16:19:42,091 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 34 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-06-27 16:19:42,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 182 flow [2024-06-27 16:19:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:19:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:19:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-27 16:19:42,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 16:19:42,093 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 116 flow. Second operand 3 states and 71 transitions. [2024-06-27 16:19:42,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 182 flow [2024-06-27 16:19:42,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 180 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 16:19:42,096 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 118 flow [2024-06-27 16:19:42,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-06-27 16:19:42,097 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2024-06-27 16:19:42,097 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 118 flow [2024-06-27 16:19:42,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:42,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:42,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:42,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 16:19:42,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:19:42,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:42,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1669691968, now seen corresponding path program 1 times [2024-06-27 16:19:42,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:42,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829678117] [2024-06-27 16:19:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:42,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:42,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:42,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829678117] [2024-06-27 16:19:42,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829678117] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:19:42,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038872295] [2024-06-27 16:19:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:42,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:42,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:19:42,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:19:42,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:19:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:42,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 16:19:42,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:19:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:42,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:19:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:42,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038872295] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:19:42,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:19:42,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 16:19:42,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080571436] [2024-06-27 16:19:42,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:19:42,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:19:42,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:42,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:19:42,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:19:42,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 16:19:42,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:42,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:42,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 16:19:42,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:42,844 INFO L124 PetriNetUnfolderBase]: 6347/10153 cut-off events. [2024-06-27 16:19:42,844 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-06-27 16:19:42,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19251 conditions, 10153 events. 6347/10153 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 62850 event pairs, 5560 based on Foata normal form. 0/8880 useless extension candidates. Maximal degree in co-relation 19237. Up to 8808 conditions per place. [2024-06-27 16:19:42,887 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 34 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-06-27 16:19:42,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 208 flow [2024-06-27 16:19:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:19:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:19:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 16:19:42,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469387755102041 [2024-06-27 16:19:42,888 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 118 flow. Second operand 6 states and 102 transitions. [2024-06-27 16:19:42,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 208 flow [2024-06-27 16:19:42,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:19:42,891 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 150 flow [2024-06-27 16:19:42,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-06-27 16:19:42,893 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2024-06-27 16:19:42,893 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 150 flow [2024-06-27 16:19:42,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:42,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:42,893 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:42,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:19:43,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-06-27 16:19:43,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:19:43,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:43,107 INFO L85 PathProgramCache]: Analyzing trace with hash 435897246, now seen corresponding path program 2 times [2024-06-27 16:19:43,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:43,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865920308] [2024-06-27 16:19:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:43,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:43,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:43,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865920308] [2024-06-27 16:19:43,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865920308] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:19:43,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18175122] [2024-06-27 16:19:43,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:19:43,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:43,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:19:43,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:19:43,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:19:43,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:19:43,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:19:43,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2024-06-27 16:19:43,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:19:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:19:43,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:19:43,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18175122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:19:43,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:19:43,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-06-27 16:19:43,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407161994] [2024-06-27 16:19:43,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:19:43,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:19:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:19:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:19:43,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 49 [2024-06-27 16:19:43,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:43,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:43,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 49 [2024-06-27 16:19:43,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:44,010 INFO L124 PetriNetUnfolderBase]: 8030/11735 cut-off events. [2024-06-27 16:19:44,011 INFO L125 PetriNetUnfolderBase]: For 380/380 co-relation queries the response was YES. [2024-06-27 16:19:44,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23135 conditions, 11735 events. 8030/11735 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 65052 event pairs, 2968 based on Foata normal form. 0/10322 useless extension candidates. Maximal degree in co-relation 23099. Up to 5868 conditions per place. [2024-06-27 16:19:44,057 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 61 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2024-06-27 16:19:44,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 332 flow [2024-06-27 16:19:44,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:19:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:19:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-27 16:19:44,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-27 16:19:44,058 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 150 flow. Second operand 3 states and 85 transitions. [2024-06-27 16:19:44,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 332 flow [2024-06-27 16:19:44,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 318 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:19:44,061 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 149 flow [2024-06-27 16:19:44,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-06-27 16:19:44,062 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2024-06-27 16:19:44,062 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 149 flow [2024-06-27 16:19:44,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:44,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:44,063 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:44,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:19:44,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:44,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:19:44,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1047582881, now seen corresponding path program 1 times [2024-06-27 16:19:44,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:44,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344135650] [2024-06-27 16:19:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:19:44,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:44,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344135650] [2024-06-27 16:19:44,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344135650] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:19:44,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570898443] [2024-06-27 16:19:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:44,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:44,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:19:44,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:19:44,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:19:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:44,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:19:44,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:19:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:19:44,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:19:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:19:44,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570898443] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:19:44,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:19:44,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-06-27 16:19:44,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469574317] [2024-06-27 16:19:44,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:19:44,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:19:44,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:19:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:19:44,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-06-27 16:19:44,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 149 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:44,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:44,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-06-27 16:19:44,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:45,175 INFO L124 PetriNetUnfolderBase]: 7325/11421 cut-off events. [2024-06-27 16:19:45,176 INFO L125 PetriNetUnfolderBase]: For 1572/1572 co-relation queries the response was YES. [2024-06-27 16:19:45,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23725 conditions, 11421 events. 7325/11421 cut-off events. For 1572/1572 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 68424 event pairs, 6208 based on Foata normal form. 2/9809 useless extension candidates. Maximal degree in co-relation 23686. Up to 10059 conditions per place. [2024-06-27 16:19:45,220 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 36 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-27 16:19:45,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 51 transitions, 247 flow [2024-06-27 16:19:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:19:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:19:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 16:19:45,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3137755102040816 [2024-06-27 16:19:45,221 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 149 flow. Second operand 8 states and 123 transitions. [2024-06-27 16:19:45,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 51 transitions, 247 flow [2024-06-27 16:19:45,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 51 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:19:45,224 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 182 flow [2024-06-27 16:19:45,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=182, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2024-06-27 16:19:45,225 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2024-06-27 16:19:45,225 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 182 flow [2024-06-27 16:19:45,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:45,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:45,226 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:45,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:19:45,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:45,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:19:45,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash -367662305, now seen corresponding path program 2 times [2024-06-27 16:19:45,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:45,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616638365] [2024-06-27 16:19:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:45,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:45,456 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:19:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:19:45,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:19:45,480 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:19:45,480 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 16:19:45,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:19:45,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 16:19:45,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 16:19:45,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:19:45,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 16:19:45,481 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2024-06-27 16:19:45,482 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:19:45,482 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-06-27 16:19:45,509 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:19:45,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 63 transitions, 154 flow [2024-06-27 16:19:45,517 INFO L124 PetriNetUnfolderBase]: 9/74 cut-off events. [2024-06-27 16:19:45,517 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-27 16:19:45,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 74 events. 9/74 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 67. Up to 5 conditions per place. [2024-06-27 16:19:45,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 63 transitions, 154 flow [2024-06-27 16:19:45,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 63 transitions, 154 flow [2024-06-27 16:19:45,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:19:45,519 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@420d0045, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:19:45,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 16:19:45,522 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:19:45,522 INFO L124 PetriNetUnfolderBase]: 2/36 cut-off events. [2024-06-27 16:19:45,522 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-06-27 16:19:45,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:45,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:45,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:19:45,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:45,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2029982741, now seen corresponding path program 1 times [2024-06-27 16:19:45,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:45,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376263364] [2024-06-27 16:19:45,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:45,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:45,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:45,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376263364] [2024-06-27 16:19:45,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376263364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:19:45,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:19:45,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:19:45,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172163155] [2024-06-27 16:19:45,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:19:45,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:19:45,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:45,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:19:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:19:45,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 63 [2024-06-27 16:19:45,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:45,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:45,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 63 [2024-06-27 16:19:45,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:51,918 INFO L124 PetriNetUnfolderBase]: 79247/113568 cut-off events. [2024-06-27 16:19:51,918 INFO L125 PetriNetUnfolderBase]: For 9189/9189 co-relation queries the response was YES. [2024-06-27 16:19:52,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218963 conditions, 113568 events. 79247/113568 cut-off events. For 9189/9189 co-relation queries the response was YES. Maximal size of possible extension queue 3059. Compared 804235 event pairs, 69712 based on Foata normal form. 9081/108686 useless extension candidates. Maximal degree in co-relation 19396. Up to 101391 conditions per place. [2024-06-27 16:19:52,731 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 44 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-06-27 16:19:52,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 238 flow [2024-06-27 16:19:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:19:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:19:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-06-27 16:19:52,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 16:19:52,734 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 154 flow. Second operand 3 states and 91 transitions. [2024-06-27 16:19:52,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 238 flow [2024-06-27 16:19:52,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 232 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 16:19:52,746 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 150 flow [2024-06-27 16:19:52,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-27 16:19:52,747 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2024-06-27 16:19:52,747 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 150 flow [2024-06-27 16:19:52,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:52,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:52,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:52,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 16:19:52,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:19:52,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash -765627188, now seen corresponding path program 1 times [2024-06-27 16:19:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:52,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233306801] [2024-06-27 16:19:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:52,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:52,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233306801] [2024-06-27 16:19:52,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233306801] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:19:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016943104] [2024-06-27 16:19:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:52,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:19:52,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:19:52,781 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:19:52,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:19:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:52,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 16:19:52,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:19:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:52,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:19:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:19:52,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016943104] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:19:52,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:19:52,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 16:19:52,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526425103] [2024-06-27 16:19:52,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:19:52,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:19:52,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:52,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:19:52,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:19:52,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 63 [2024-06-27 16:19:52,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 150 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:52,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:52,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 63 [2024-06-27 16:19:52,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:59,238 INFO L124 PetriNetUnfolderBase]: 79247/113571 cut-off events. [2024-06-27 16:19:59,238 INFO L125 PetriNetUnfolderBase]: For 3903/3903 co-relation queries the response was YES. [2024-06-27 16:19:59,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217440 conditions, 113571 events. 79247/113571 cut-off events. For 3903/3903 co-relation queries the response was YES. Maximal size of possible extension queue 3059. Compared 804179 event pairs, 69712 based on Foata normal form. 0/99608 useless extension candidates. Maximal degree in co-relation 217425. Up to 101391 conditions per place. [2024-06-27 16:19:59,903 INFO L140 encePairwiseOnDemand]: 60/63 looper letters, 44 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-06-27 16:19:59,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 260 flow [2024-06-27 16:19:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:19:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:19:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-27 16:19:59,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-27 16:19:59,904 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 150 flow. Second operand 6 states and 130 transitions. [2024-06-27 16:19:59,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 260 flow [2024-06-27 16:19:59,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 62 transitions, 256 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:19:59,916 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 182 flow [2024-06-27 16:19:59,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-06-27 16:19:59,918 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2024-06-27 16:19:59,918 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 182 flow [2024-06-27 16:19:59,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:19:59,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:59,918 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:59,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:20:00,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 16:20:00,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:20:00,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:00,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1102275541, now seen corresponding path program 2 times [2024-06-27 16:20:00,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:00,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064775949] [2024-06-27 16:20:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:00,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:20:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:20:00,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:20:00,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064775949] [2024-06-27 16:20:00,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064775949] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:20:00,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9044724] [2024-06-27 16:20:00,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:20:00,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:20:00,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:20:00,187 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:20:00,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:20:00,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:20:00,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:20:00,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2024-06-27 16:20:00,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:20:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:20:00,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:20:00,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9044724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:20:00,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:20:00,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-06-27 16:20:00,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477463325] [2024-06-27 16:20:00,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:20:00,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:20:00,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:20:00,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:20:00,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:20:00,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 63 [2024-06-27 16:20:00,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:20:00,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:20:00,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 63 [2024-06-27 16:20:00,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:20:07,976 INFO L124 PetriNetUnfolderBase]: 99317/133094 cut-off events. [2024-06-27 16:20:07,976 INFO L125 PetriNetUnfolderBase]: For 3795/3795 co-relation queries the response was YES. [2024-06-27 16:20:08,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262512 conditions, 133094 events. 99317/133094 cut-off events. For 3795/3795 co-relation queries the response was YES. Maximal size of possible extension queue 2999. Compared 839553 event pairs, 37636 based on Foata normal form. 0/117098 useless extension candidates. Maximal degree in co-relation 262475. Up to 67590 conditions per place. [2024-06-27 16:20:08,692 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 81 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2024-06-27 16:20:08,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 429 flow [2024-06-27 16:20:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:20:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:20:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-06-27 16:20:08,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-27 16:20:08,694 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 182 flow. Second operand 3 states and 114 transitions. [2024-06-27 16:20:08,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 429 flow [2024-06-27 16:20:08,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 415 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:20:08,701 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 181 flow [2024-06-27 16:20:08,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-06-27 16:20:08,703 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2024-06-27 16:20:08,703 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 181 flow [2024-06-27 16:20:08,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:20:08,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:20:08,704 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:20:08,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 16:20:08,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 16:20:08,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:20:08,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash -490519290, now seen corresponding path program 1 times [2024-06-27 16:20:08,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:08,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587708330] [2024-06-27 16:20:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:08,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:20:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-06-27 16:20:08,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:20:08,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587708330] [2024-06-27 16:20:08,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587708330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:20:08,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:20:08,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:20:08,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916596623] [2024-06-27 16:20:08,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:20:08,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:20:08,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:20:08,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:20:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:20:08,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 63 [2024-06-27 16:20:08,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:20:08,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:20:08,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 63 [2024-06-27 16:20:08,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand