./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.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.graphml --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 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:50:04,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:50:04,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:50:04,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:50:04,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:50:04,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:50:04,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:50:04,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:50:04,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:50:04,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:50:04,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:50:04,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:50:04,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:50:04,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:50:04,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:50:04,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:50:04,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:50:04,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:50:04,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:50:04,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:50:04,381 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:50:04,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:50:04,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:50:04,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:50:04,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:50:04,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:50:04,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:50:04,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:50:04,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:50:04,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:50:04,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:50:04,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:50:04,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:50:04,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:50:04,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:50:04,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:50:04,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:50:04,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:50:04,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:50:04,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:50:04,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:50:04,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:50:04,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:50:04,429 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:50:04,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:50:04,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:50:04,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:50:04,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:50:04,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:50:04,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:50:04,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:50:04,432 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:50:04,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:50:04,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:50:04,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:50:04,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:50:04,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:50:04,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:50:04,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:50:04,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:50:04,433 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:50:04,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:50:04,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:50:04,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:50:04,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:50:04,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:50:04,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:50:04,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:50:04,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:50:04,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:50:04,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:50:04,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:50:04,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:50:04,435 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:50:04,436 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:50:04,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:50:04,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 [2022-07-21 08:50:04,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:50:04,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:50:04,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:50:04,747 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:50:04,747 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:50:04,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2022-07-21 08:50:04,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40a7e8fac/9b055bee5b084d13b864877c4cff31f4/FLAG6988ec5bc [2022-07-21 08:50:05,194 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:50:05,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2022-07-21 08:50:05,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40a7e8fac/9b055bee5b084d13b864877c4cff31f4/FLAG6988ec5bc [2022-07-21 08:50:05,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40a7e8fac/9b055bee5b084d13b864877c4cff31f4 [2022-07-21 08:50:05,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:50:05,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:50:05,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:50:05,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:50:05,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:50:05,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:05,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61dbf6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05, skipping insertion in model container [2022-07-21 08:50:05,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:05,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:50:05,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:50:05,820 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2022-07-21 08:50:05,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:50:05,856 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:50:05,895 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2022-07-21 08:50:05,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:50:05,942 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:50:05,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05 WrapperNode [2022-07-21 08:50:05,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:50:05,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:50:05,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:50:05,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:50:05,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:05,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:05,996 INFO L137 Inliner]: procedures = 172, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2022-07-21 08:50:05,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:50:05,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:50:05,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:50:05,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:50:06,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:06,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:06,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:06,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:06,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:06,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:06,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:06,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:50:06,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:50:06,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:50:06,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:50:06,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:06,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:50:06,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:06,059 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:50:06,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:50:06,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:50:06,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:50:06,100 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:50:06,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:50:06,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:50:06,100 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-21 08:50:06,100 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-21 08:50:06,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:50:06,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:50:06,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:50:06,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:50:06,102 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:50:06,228 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:50:06,229 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:50:06,470 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:50:06,475 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:50:06,475 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-21 08:50:06,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:06 BoogieIcfgContainer [2022-07-21 08:50:06,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:50:06,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:50:06,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:50:06,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:50:06,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:50:05" (1/3) ... [2022-07-21 08:50:06,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547caf9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:06, skipping insertion in model container [2022-07-21 08:50:06,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05" (2/3) ... [2022-07-21 08:50:06,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547caf9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:06, skipping insertion in model container [2022-07-21 08:50:06,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:06" (3/3) ... [2022-07-21 08:50:06,483 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2022-07-21 08:50:06,492 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:50:06,499 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:50:06,500 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:50:06,500 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:50:06,558 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:50:06,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 115 transitions, 238 flow [2022-07-21 08:50:06,654 INFO L129 PetriNetUnfolder]: 17/156 cut-off events. [2022-07-21 08:50:06,654 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:06,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 390 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2022-07-21 08:50:06,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 115 transitions, 238 flow [2022-07-21 08:50:06,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 110 transitions, 225 flow [2022-07-21 08:50:06,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:06,697 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=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68d3f5d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@abaa6af [2022-07-21 08:50:06,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:06,722 INFO L129 PetriNetUnfolder]: 5/85 cut-off events. [2022-07-21 08:50:06,722 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:06,722 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:06,723 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:06,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash 438148196, now seen corresponding path program 1 times [2022-07-21 08:50:06,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:06,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758297838] [2022-07-21 08:50:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:06,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:06,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:06,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758297838] [2022-07-21 08:50:06,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758297838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:06,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:06,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:06,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250883202] [2022-07-21 08:50:06,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:06,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:06,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:06,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:06,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:06,955 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 115 [2022-07-21 08:50:06,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2022-07-21 08:50:06,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:06,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 115 [2022-07-21 08:50:06,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:07,011 INFO L129 PetriNetUnfolder]: 0/102 cut-off events. [2022-07-21 08:50:07,013 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:07,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 102 events. 0/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 18/117 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-21 08:50:07,014 INFO L132 encePairwiseOnDemand]: 101/115 looper letters, 8 selfloop transitions, 2 changer transitions 17/100 dead transitions. [2022-07-21 08:50:07,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 225 flow [2022-07-21 08:50:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:07,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2022-07-21 08:50:07,028 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9014492753623189 [2022-07-21 08:50:07,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2022-07-21 08:50:07,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2022-07-21 08:50:07,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:07,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2022-07-21 08:50:07,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2022-07-21 08:50:07,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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) [2022-07-21 08:50:07,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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) [2022-07-21 08:50:07,049 INFO L186 Difference]: Start difference. First operand has 102 places, 110 transitions, 225 flow. Second operand 3 states and 311 transitions. [2022-07-21 08:50:07,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 225 flow [2022-07-21 08:50:07,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 100 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:07,053 INFO L242 Difference]: Finished difference. Result has 104 places, 81 transitions, 175 flow [2022-07-21 08:50:07,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=104, PETRI_TRANSITIONS=81} [2022-07-21 08:50:07,057 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 2 predicate places. [2022-07-21 08:50:07,057 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 81 transitions, 175 flow [2022-07-21 08:50:07,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2022-07-21 08:50:07,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:07,057 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:07,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:50:07,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1685952027, now seen corresponding path program 1 times [2022-07-21 08:50:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:07,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837675940] [2022-07-21 08:50:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:07,103 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:07,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:07,150 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:07,151 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:07,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:07,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:50:07,155 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:50:07,158 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:07,158 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:50:07,180 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 08:50:07,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2022-07-21 08:50:07,209 INFO L129 PetriNetUnfolder]: 31/257 cut-off events. [2022-07-21 08:50:07,210 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:50:07,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 813 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2022-07-21 08:50:07,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 150 transitions, 318 flow [2022-07-21 08:50:07,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 150 transitions, 318 flow [2022-07-21 08:50:07,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:07,215 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=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68d3f5d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@abaa6af [2022-07-21 08:50:07,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:07,228 INFO L129 PetriNetUnfolder]: 6/94 cut-off events. [2022-07-21 08:50:07,229 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:07,229 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:07,229 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:07,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:07,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:07,230 INFO L85 PathProgramCache]: Analyzing trace with hash -390354118, now seen corresponding path program 1 times [2022-07-21 08:50:07,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:07,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513913812] [2022-07-21 08:50:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:07,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:07,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513913812] [2022-07-21 08:50:07,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513913812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:07,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:07,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:07,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584952548] [2022-07-21 08:50:07,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:07,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:07,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:07,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:07,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:07,265 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 150 [2022-07-21 08:50:07,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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) [2022-07-21 08:50:07,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:07,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 150 [2022-07-21 08:50:07,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:07,302 INFO L129 PetriNetUnfolder]: 2/204 cut-off events. [2022-07-21 08:50:07,303 INFO L130 PetriNetUnfolder]: For 20/31 co-relation queries the response was YES. [2022-07-21 08:50:07,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 204 events. 2/204 cut-off events. For 20/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 470 event pairs, 0 based on Foata normal form. 65/261 useless extension candidates. Maximal degree in co-relation 132. Up to 16 conditions per place. [2022-07-21 08:50:07,304 INFO L132 encePairwiseOnDemand]: 130/150 looper letters, 11 selfloop transitions, 2 changer transitions 23/136 dead transitions. [2022-07-21 08:50:07,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 136 transitions, 320 flow [2022-07-21 08:50:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2022-07-21 08:50:07,306 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8955555555555555 [2022-07-21 08:50:07,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2022-07-21 08:50:07,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2022-07-21 08:50:07,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:07,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2022-07-21 08:50:07,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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) [2022-07-21 08:50:07,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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) [2022-07-21 08:50:07,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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) [2022-07-21 08:50:07,310 INFO L186 Difference]: Start difference. First operand has 136 places, 150 transitions, 318 flow. Second operand 3 states and 403 transitions. [2022-07-21 08:50:07,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 136 transitions, 320 flow [2022-07-21 08:50:07,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 136 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:07,313 INFO L242 Difference]: Finished difference. Result has 138 places, 110 transitions, 242 flow [2022-07-21 08:50:07,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=138, PETRI_TRANSITIONS=110} [2022-07-21 08:50:07,313 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, 2 predicate places. [2022-07-21 08:50:07,314 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 110 transitions, 242 flow [2022-07-21 08:50:07,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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) [2022-07-21 08:50:07,314 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:07,314 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:07,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:50:07,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:07,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:07,315 INFO L85 PathProgramCache]: Analyzing trace with hash -993521947, now seen corresponding path program 1 times [2022-07-21 08:50:07,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:07,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372215961] [2022-07-21 08:50:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:07,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:07,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372215961] [2022-07-21 08:50:07,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372215961] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:07,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140683764] [2022-07-21 08:50:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:07,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:07,373 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) [2022-07-21 08:50:07,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:50:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:07,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:07,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:07,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:07,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140683764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:07,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:07,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425663413] [2022-07-21 08:50:07,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:07,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:07,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:07,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:07,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:07,592 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 150 [2022-07-21 08:50:07,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 110 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 122.3) internal successors, (1223), 10 states have internal predecessors, (1223), 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) [2022-07-21 08:50:07,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:07,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 150 [2022-07-21 08:50:07,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:07,678 INFO L129 PetriNetUnfolder]: 0/108 cut-off events. [2022-07-21 08:50:07,679 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 08:50:07,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 108 events. 0/108 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 2/110 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-21 08:50:07,682 INFO L132 encePairwiseOnDemand]: 145/150 looper letters, 9 selfloop transitions, 7 changer transitions 0/102 dead transitions. [2022-07-21 08:50:07,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 256 flow [2022-07-21 08:50:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:07,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1098 transitions. [2022-07-21 08:50:07,686 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8133333333333334 [2022-07-21 08:50:07,686 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1098 transitions. [2022-07-21 08:50:07,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1098 transitions. [2022-07-21 08:50:07,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:07,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1098 transitions. [2022-07-21 08:50:07,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 122.0) internal successors, (1098), 9 states have internal predecessors, (1098), 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) [2022-07-21 08:50:07,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 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) [2022-07-21 08:50:07,694 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 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) [2022-07-21 08:50:07,695 INFO L186 Difference]: Start difference. First operand has 138 places, 110 transitions, 242 flow. Second operand 9 states and 1098 transitions. [2022-07-21 08:50:07,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 256 flow [2022-07-21 08:50:07,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 252 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:07,711 INFO L242 Difference]: Finished difference. Result has 110 places, 98 transitions, 226 flow [2022-07-21 08:50:07,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=110, PETRI_TRANSITIONS=98} [2022-07-21 08:50:07,714 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -26 predicate places. [2022-07-21 08:50:07,714 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 98 transitions, 226 flow [2022-07-21 08:50:07,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 122.3) internal successors, (1223), 10 states have internal predecessors, (1223), 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) [2022-07-21 08:50:07,718 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:07,719 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:07,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:07,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:07,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:07,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:07,937 INFO L85 PathProgramCache]: Analyzing trace with hash 210109917, now seen corresponding path program 1 times [2022-07-21 08:50:07,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:07,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512090059] [2022-07-21 08:50:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:07,968 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:07,997 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:07,998 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:07,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:07,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:07,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:50:07,998 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:50:07,999 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:07,999 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:50:08,019 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:50:08,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2022-07-21 08:50:08,058 INFO L129 PetriNetUnfolder]: 50/391 cut-off events. [2022-07-21 08:50:08,058 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-21 08:50:08,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 391 events. 50/391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1375 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2022-07-21 08:50:08,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 400 flow [2022-07-21 08:50:08,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 400 flow [2022-07-21 08:50:08,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:08,073 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=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68d3f5d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@abaa6af [2022-07-21 08:50:08,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:08,083 INFO L129 PetriNetUnfolder]: 3/82 cut-off events. [2022-07-21 08:50:08,083 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:08,083 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:08,083 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:08,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1164806739, now seen corresponding path program 1 times [2022-07-21 08:50:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:08,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538689313] [2022-07-21 08:50:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:08,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:08,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538689313] [2022-07-21 08:50:08,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538689313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:08,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:08,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:08,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41490211] [2022-07-21 08:50:08,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:08,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:08,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:08,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:08,136 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 185 [2022-07-21 08:50:08,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 185 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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) [2022-07-21 08:50:08,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:08,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 185 [2022-07-21 08:50:08,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:08,205 INFO L129 PetriNetUnfolder]: 7/323 cut-off events. [2022-07-21 08:50:08,206 INFO L130 PetriNetUnfolder]: For 61/107 co-relation queries the response was YES. [2022-07-21 08:50:08,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 323 events. 7/323 cut-off events. For 61/107 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1011 event pairs, 1 based on Foata normal form. 175/484 useless extension candidates. Maximal degree in co-relation 237. Up to 30 conditions per place. [2022-07-21 08:50:08,208 INFO L132 encePairwiseOnDemand]: 159/185 looper letters, 12 selfloop transitions, 2 changer transitions 24/165 dead transitions. [2022-07-21 08:50:08,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 165 transitions, 394 flow [2022-07-21 08:50:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2022-07-21 08:50:08,209 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8864864864864865 [2022-07-21 08:50:08,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2022-07-21 08:50:08,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2022-07-21 08:50:08,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:08,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2022-07-21 08:50:08,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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) [2022-07-21 08:50:08,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-07-21 08:50:08,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-07-21 08:50:08,212 INFO L186 Difference]: Start difference. First operand has 166 places, 185 transitions, 400 flow. Second operand 3 states and 492 transitions. [2022-07-21 08:50:08,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 165 transitions, 394 flow [2022-07-21 08:50:08,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:08,218 INFO L242 Difference]: Finished difference. Result has 168 places, 138 transitions, 307 flow [2022-07-21 08:50:08,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=168, PETRI_TRANSITIONS=138} [2022-07-21 08:50:08,220 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 2 predicate places. [2022-07-21 08:50:08,220 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 138 transitions, 307 flow [2022-07-21 08:50:08,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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) [2022-07-21 08:50:08,220 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:08,220 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:08,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:50:08,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:08,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1762072419, now seen corresponding path program 1 times [2022-07-21 08:50:08,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:08,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562713752] [2022-07-21 08:50:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:08,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562713752] [2022-07-21 08:50:08,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562713752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:08,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423167503] [2022-07-21 08:50:08,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:08,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:08,272 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) [2022-07-21 08:50:08,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:50:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:08,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:08,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:08,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:08,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423167503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:08,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:08,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:08,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547856337] [2022-07-21 08:50:08,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:08,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:08,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:08,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:08,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:08,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 185 [2022-07-21 08:50:08,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 138 transitions, 307 flow. Second operand has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 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) [2022-07-21 08:50:08,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:08,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 185 [2022-07-21 08:50:08,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:08,534 INFO L129 PetriNetUnfolder]: 0/159 cut-off events. [2022-07-21 08:50:08,534 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-21 08:50:08,535 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 159 events. 0/159 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 260 event pairs, 0 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-21 08:50:08,535 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 13 selfloop transitions, 9 changer transitions 0/148 dead transitions. [2022-07-21 08:50:08,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 148 transitions, 373 flow [2022-07-21 08:50:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1347 transitions. [2022-07-21 08:50:08,538 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.809009009009009 [2022-07-21 08:50:08,538 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1347 transitions. [2022-07-21 08:50:08,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1347 transitions. [2022-07-21 08:50:08,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:08,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1347 transitions. [2022-07-21 08:50:08,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.66666666666666) internal successors, (1347), 9 states have internal predecessors, (1347), 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) [2022-07-21 08:50:08,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 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) [2022-07-21 08:50:08,543 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 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) [2022-07-21 08:50:08,543 INFO L186 Difference]: Start difference. First operand has 168 places, 138 transitions, 307 flow. Second operand 9 states and 1347 transitions. [2022-07-21 08:50:08,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 148 transitions, 373 flow [2022-07-21 08:50:08,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 148 transitions, 365 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:08,546 INFO L242 Difference]: Finished difference. Result has 157 places, 144 transitions, 349 flow [2022-07-21 08:50:08,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=349, PETRI_PLACES=157, PETRI_TRANSITIONS=144} [2022-07-21 08:50:08,547 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, -9 predicate places. [2022-07-21 08:50:08,547 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 144 transitions, 349 flow [2022-07-21 08:50:08,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 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) [2022-07-21 08:50:08,547 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:08,548 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:08,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:08,766 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,SelfDestructingSolverStorable6 [2022-07-21 08:50:08,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1592736104, now seen corresponding path program 1 times [2022-07-21 08:50:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:08,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677273949] [2022-07-21 08:50:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:08,783 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:08,796 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:08,796 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:08,797 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:08,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:08,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:50:08,797 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:50:08,797 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:08,798 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:50:08,810 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:50:08,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2022-07-21 08:50:08,860 INFO L129 PetriNetUnfolder]: 81/593 cut-off events. [2022-07-21 08:50:08,860 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 08:50:08,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 593 events. 81/593 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2354 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 411. Up to 32 conditions per place. [2022-07-21 08:50:08,865 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 220 transitions, 484 flow [2022-07-21 08:50:08,869 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 220 transitions, 484 flow [2022-07-21 08:50:08,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:08,870 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=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68d3f5d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@abaa6af [2022-07-21 08:50:08,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:08,874 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2022-07-21 08:50:08,874 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:08,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:08,874 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:08,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1314222096, now seen corresponding path program 1 times [2022-07-21 08:50:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:08,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463904101] [2022-07-21 08:50:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:08,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:08,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463904101] [2022-07-21 08:50:08,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463904101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:08,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:08,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:08,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111404716] [2022-07-21 08:50:08,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:08,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:08,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:08,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 220 [2022-07-21 08:50:08,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 220 transitions, 484 flow. Second operand has 2 states, 2 states have (on average 182.5) internal successors, (365), 2 states have internal predecessors, (365), 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) [2022-07-21 08:50:08,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:08,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 220 [2022-07-21 08:50:08,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:08,956 INFO L129 PetriNetUnfolder]: 21/528 cut-off events. [2022-07-21 08:50:08,957 INFO L130 PetriNetUnfolder]: For 126/142 co-relation queries the response was YES. [2022-07-21 08:50:08,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 528 events. 21/528 cut-off events. For 126/142 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2148 event pairs, 6 based on Foata normal form. 248/750 useless extension candidates. Maximal degree in co-relation 380. Up to 37 conditions per place. [2022-07-21 08:50:08,960 INFO L132 encePairwiseOnDemand]: 191/220 looper letters, 4 selfloop transitions, 0 changer transitions 25/190 dead transitions. [2022-07-21 08:50:08,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 190 transitions, 440 flow [2022-07-21 08:50:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 401 transitions. [2022-07-21 08:50:08,961 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9113636363636364 [2022-07-21 08:50:08,961 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 401 transitions. [2022-07-21 08:50:08,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 401 transitions. [2022-07-21 08:50:08,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:08,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 401 transitions. [2022-07-21 08:50:08,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 200.5) internal successors, (401), 2 states have internal predecessors, (401), 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) [2022-07-21 08:50:08,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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) [2022-07-21 08:50:08,963 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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) [2022-07-21 08:50:08,963 INFO L186 Difference]: Start difference. First operand has 196 places, 220 transitions, 484 flow. Second operand 2 states and 401 transitions. [2022-07-21 08:50:08,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 190 transitions, 440 flow [2022-07-21 08:50:08,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 190 transitions, 440 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:08,966 INFO L242 Difference]: Finished difference. Result has 196 places, 165 transitions, 362 flow [2022-07-21 08:50:08,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=196, PETRI_TRANSITIONS=165} [2022-07-21 08:50:08,967 INFO L279 CegarLoopForPetriNet]: 196 programPoint places, 0 predicate places. [2022-07-21 08:50:08,967 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 165 transitions, 362 flow [2022-07-21 08:50:08,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 182.5) internal successors, (365), 2 states have internal predecessors, (365), 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) [2022-07-21 08:50:08,967 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:08,967 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:08,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:50:08,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash 808663471, now seen corresponding path program 1 times [2022-07-21 08:50:08,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:08,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710373476] [2022-07-21 08:50:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:08,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:08,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710373476] [2022-07-21 08:50:08,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710373476] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:08,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:08,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:08,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420736076] [2022-07-21 08:50:08,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:08,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:08,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:08,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:08,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:08,984 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 220 [2022-07-21 08:50:08,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 165 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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) [2022-07-21 08:50:08,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:08,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 220 [2022-07-21 08:50:08,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:09,022 INFO L129 PetriNetUnfolder]: 0/238 cut-off events. [2022-07-21 08:50:09,023 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:50:09,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 238 events. 0/238 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 629 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-21 08:50:09,023 INFO L132 encePairwiseOnDemand]: 217/220 looper letters, 13 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2022-07-21 08:50:09,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 169 transitions, 400 flow [2022-07-21 08:50:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-07-21 08:50:09,025 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8196969696969697 [2022-07-21 08:50:09,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-07-21 08:50:09,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-07-21 08:50:09,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:09,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-07-21 08:50:09,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 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) [2022-07-21 08:50:09,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2022-07-21 08:50:09,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2022-07-21 08:50:09,028 INFO L186 Difference]: Start difference. First operand has 196 places, 165 transitions, 362 flow. Second operand 3 states and 541 transitions. [2022-07-21 08:50:09,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 169 transitions, 400 flow [2022-07-21 08:50:09,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 169 transitions, 388 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:09,032 INFO L242 Difference]: Finished difference. Result has 178 places, 166 transitions, 362 flow [2022-07-21 08:50:09,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=178, PETRI_TRANSITIONS=166} [2022-07-21 08:50:09,033 INFO L279 CegarLoopForPetriNet]: 196 programPoint places, -18 predicate places. [2022-07-21 08:50:09,033 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 166 transitions, 362 flow [2022-07-21 08:50:09,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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) [2022-07-21 08:50:09,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:09,034 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:09,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:50:09,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash -587956040, now seen corresponding path program 1 times [2022-07-21 08:50:09,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:09,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286632980] [2022-07-21 08:50:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:09,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:09,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:09,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286632980] [2022-07-21 08:50:09,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286632980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:09,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196912630] [2022-07-21 08:50:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:09,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:09,075 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) [2022-07-21 08:50:09,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:50:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:09,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:09,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:09,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:09,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196912630] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:09,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:09,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:09,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871759576] [2022-07-21 08:50:09,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:09,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:09,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:09,206 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 220 [2022-07-21 08:50:09,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 166 transitions, 362 flow. Second operand has 10 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 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) [2022-07-21 08:50:09,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:09,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 220 [2022-07-21 08:50:09,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:09,281 INFO L129 PetriNetUnfolder]: 0/210 cut-off events. [2022-07-21 08:50:09,281 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:50:09,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 210 events. 0/210 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 459 event pairs, 0 based on Foata normal form. 2/212 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-21 08:50:09,282 INFO L132 encePairwiseOnDemand]: 214/220 looper letters, 14 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2022-07-21 08:50:09,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 430 flow [2022-07-21 08:50:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1591 transitions. [2022-07-21 08:50:09,286 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8035353535353535 [2022-07-21 08:50:09,286 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1591 transitions. [2022-07-21 08:50:09,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1591 transitions. [2022-07-21 08:50:09,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:09,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1591 transitions. [2022-07-21 08:50:09,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.77777777777777) internal successors, (1591), 9 states have internal predecessors, (1591), 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) [2022-07-21 08:50:09,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 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) [2022-07-21 08:50:09,293 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 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) [2022-07-21 08:50:09,293 INFO L186 Difference]: Start difference. First operand has 178 places, 166 transitions, 362 flow. Second operand 9 states and 1591 transitions. [2022-07-21 08:50:09,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 430 flow [2022-07-21 08:50:09,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 176 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:09,296 INFO L242 Difference]: Finished difference. Result has 188 places, 172 transitions, 410 flow [2022-07-21 08:50:09,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=188, PETRI_TRANSITIONS=172} [2022-07-21 08:50:09,298 INFO L279 CegarLoopForPetriNet]: 196 programPoint places, -8 predicate places. [2022-07-21 08:50:09,298 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 172 transitions, 410 flow [2022-07-21 08:50:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 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) [2022-07-21 08:50:09,299 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:09,299 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:09,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:09,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:09,507 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:09,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1706824039, now seen corresponding path program 1 times [2022-07-21 08:50:09,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:09,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262343411] [2022-07-21 08:50:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:09,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 08:50:09,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262343411] [2022-07-21 08:50:09,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262343411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:09,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:09,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:50:09,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274997648] [2022-07-21 08:50:09,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:09,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:50:09,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:09,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:50:09,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:50:09,566 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 220 [2022-07-21 08:50:09,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 172 transitions, 410 flow. Second operand has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 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) [2022-07-21 08:50:09,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:09,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 220 [2022-07-21 08:50:09,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:14,056 INFO L129 PetriNetUnfolder]: 16742/44787 cut-off events. [2022-07-21 08:50:14,056 INFO L130 PetriNetUnfolder]: For 475/475 co-relation queries the response was YES. [2022-07-21 08:50:14,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67978 conditions, 44787 events. 16742/44787 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 1798. Compared 565480 event pairs, 9176 based on Foata normal form. 750/44882 useless extension candidates. Maximal degree in co-relation 67967. Up to 14189 conditions per place. [2022-07-21 08:50:14,444 INFO L132 encePairwiseOnDemand]: 212/220 looper letters, 31 selfloop transitions, 5 changer transitions 53/236 dead transitions. [2022-07-21 08:50:14,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 236 transitions, 731 flow [2022-07-21 08:50:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:50:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 08:50:14,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1211 transitions. [2022-07-21 08:50:14,447 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7863636363636364 [2022-07-21 08:50:14,447 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1211 transitions. [2022-07-21 08:50:14,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1211 transitions. [2022-07-21 08:50:14,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:14,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1211 transitions. [2022-07-21 08:50:14,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 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) [2022-07-21 08:50:14,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 220.0) internal successors, (1760), 8 states have internal predecessors, (1760), 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) [2022-07-21 08:50:14,453 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 220.0) internal successors, (1760), 8 states have internal predecessors, (1760), 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) [2022-07-21 08:50:14,454 INFO L186 Difference]: Start difference. First operand has 188 places, 172 transitions, 410 flow. Second operand 7 states and 1211 transitions. [2022-07-21 08:50:14,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 236 transitions, 731 flow [2022-07-21 08:50:14,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 236 transitions, 725 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:14,458 INFO L242 Difference]: Finished difference. Result has 198 places, 176 transitions, 461 flow [2022-07-21 08:50:14,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=198, PETRI_TRANSITIONS=176} [2022-07-21 08:50:14,459 INFO L279 CegarLoopForPetriNet]: 196 programPoint places, 2 predicate places. [2022-07-21 08:50:14,459 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 176 transitions, 461 flow [2022-07-21 08:50:14,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 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) [2022-07-21 08:50:14,460 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:14,460 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:14,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:50:14,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash 382849206, now seen corresponding path program 1 times [2022-07-21 08:50:14,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:14,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154592841] [2022-07-21 08:50:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:14,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:14,481 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:14,512 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:14,514 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:14,514 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:14,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:14,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:50:14,514 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:50:14,515 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:14,515 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:50:14,536 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-21 08:50:14,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 570 flow [2022-07-21 08:50:14,616 INFO L129 PetriNetUnfolder]: 140/935 cut-off events. [2022-07-21 08:50:14,616 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-21 08:50:14,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 935 events. 140/935 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4361 event pairs, 23 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 638. Up to 80 conditions per place. [2022-07-21 08:50:14,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 255 transitions, 570 flow [2022-07-21 08:50:14,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 255 transitions, 570 flow [2022-07-21 08:50:14,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:14,635 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=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68d3f5d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@abaa6af [2022-07-21 08:50:14,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:14,638 INFO L129 PetriNetUnfolder]: 6/92 cut-off events. [2022-07-21 08:50:14,638 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:14,638 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:14,638 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:14,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1458783922, now seen corresponding path program 1 times [2022-07-21 08:50:14,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:14,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4255507] [2022-07-21 08:50:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:14,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:14,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4255507] [2022-07-21 08:50:14,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4255507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:14,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:14,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:14,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435296258] [2022-07-21 08:50:14,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:14,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:14,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:14,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:14,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:14,668 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 255 [2022-07-21 08:50:14,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 255 transitions, 570 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2022-07-21 08:50:14,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:14,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 255 [2022-07-21 08:50:14,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:14,773 INFO L129 PetriNetUnfolder]: 53/821 cut-off events. [2022-07-21 08:50:14,773 INFO L130 PetriNetUnfolder]: For 302/421 co-relation queries the response was YES. [2022-07-21 08:50:14,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 821 events. 53/821 cut-off events. For 302/421 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3965 event pairs, 23 based on Foata normal form. 831/1610 useless extension candidates. Maximal degree in co-relation 620. Up to 110 conditions per place. [2022-07-21 08:50:14,778 INFO L132 encePairwiseOnDemand]: 217/255 looper letters, 14 selfloop transitions, 2 changer transitions 26/223 dead transitions. [2022-07-21 08:50:14,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 223 transitions, 548 flow [2022-07-21 08:50:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 670 transitions. [2022-07-21 08:50:14,780 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8758169934640523 [2022-07-21 08:50:14,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 670 transitions. [2022-07-21 08:50:14,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 670 transitions. [2022-07-21 08:50:14,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:14,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 670 transitions. [2022-07-21 08:50:14,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 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) [2022-07-21 08:50:14,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2022-07-21 08:50:14,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2022-07-21 08:50:14,783 INFO L186 Difference]: Start difference. First operand has 226 places, 255 transitions, 570 flow. Second operand 3 states and 670 transitions. [2022-07-21 08:50:14,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 223 transitions, 548 flow [2022-07-21 08:50:14,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 223 transitions, 548 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:14,787 INFO L242 Difference]: Finished difference. Result has 228 places, 194 transitions, 443 flow [2022-07-21 08:50:14,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=443, PETRI_PLACES=228, PETRI_TRANSITIONS=194} [2022-07-21 08:50:14,789 INFO L279 CegarLoopForPetriNet]: 226 programPoint places, 2 predicate places. [2022-07-21 08:50:14,789 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 194 transitions, 443 flow [2022-07-21 08:50:14,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2022-07-21 08:50:14,789 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:14,789 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:14,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 08:50:14,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:14,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1766140106, now seen corresponding path program 1 times [2022-07-21 08:50:14,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:14,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69223503] [2022-07-21 08:50:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:14,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:14,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:14,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69223503] [2022-07-21 08:50:14,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69223503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:14,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028895495] [2022-07-21 08:50:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:14,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:14,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:14,825 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) [2022-07-21 08:50:14,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:50:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:14,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:14,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:14,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:14,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028895495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:14,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:14,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:14,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069785155] [2022-07-21 08:50:14,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:14,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:14,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:14,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:14,943 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 255 [2022-07-21 08:50:14,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 194 transitions, 443 flow. Second operand has 10 states, 10 states have (on average 203.3) internal successors, (2033), 10 states have internal predecessors, (2033), 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) [2022-07-21 08:50:14,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:14,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 255 [2022-07-21 08:50:14,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:15,106 INFO L129 PetriNetUnfolder]: 0/261 cut-off events. [2022-07-21 08:50:15,106 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-21 08:50:15,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 261 events. 0/261 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 657 event pairs, 0 based on Foata normal form. 2/263 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:50:15,107 INFO L132 encePairwiseOnDemand]: 249/255 looper letters, 15 selfloop transitions, 9 changer transitions 0/204 dead transitions. [2022-07-21 08:50:15,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 204 transitions, 513 flow [2022-07-21 08:50:15,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1835 transitions. [2022-07-21 08:50:15,111 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7995642701525054 [2022-07-21 08:50:15,111 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1835 transitions. [2022-07-21 08:50:15,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1835 transitions. [2022-07-21 08:50:15,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:15,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1835 transitions. [2022-07-21 08:50:15,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.88888888888889) internal successors, (1835), 9 states have internal predecessors, (1835), 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) [2022-07-21 08:50:15,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 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) [2022-07-21 08:50:15,119 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 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) [2022-07-21 08:50:15,119 INFO L186 Difference]: Start difference. First operand has 228 places, 194 transitions, 443 flow. Second operand 9 states and 1835 transitions. [2022-07-21 08:50:15,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 204 transitions, 513 flow [2022-07-21 08:50:15,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 204 transitions, 491 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:15,123 INFO L242 Difference]: Finished difference. Result has 217 places, 200 transitions, 471 flow [2022-07-21 08:50:15,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=471, PETRI_PLACES=217, PETRI_TRANSITIONS=200} [2022-07-21 08:50:15,124 INFO L279 CegarLoopForPetriNet]: 226 programPoint places, -9 predicate places. [2022-07-21 08:50:15,124 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 200 transitions, 471 flow [2022-07-21 08:50:15,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 203.3) internal successors, (2033), 10 states have internal predecessors, (2033), 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) [2022-07-21 08:50:15,125 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:15,125 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:15,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:15,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 08:50:15,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1937188195, now seen corresponding path program 1 times [2022-07-21 08:50:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:15,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967586934] [2022-07-21 08:50:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:15,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 08:50:15,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:15,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967586934] [2022-07-21 08:50:15,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967586934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:15,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:15,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:50:15,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805618370] [2022-07-21 08:50:15,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:15,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:50:15,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:50:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:50:15,406 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 255 [2022-07-21 08:50:15,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 200 transitions, 471 flow. Second operand has 5 states, 5 states have (on average 184.6) internal successors, (923), 5 states have internal predecessors, (923), 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) [2022-07-21 08:50:15,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:15,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 255 [2022-07-21 08:50:15,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand