./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.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_06-cond_racing1.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 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:50:04,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:50:04,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:50:04,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:50:04,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:50:04,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:50:04,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:50:04,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:50:04,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:50:04,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:50:04,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:50:04,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:50:04,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:50:04,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:50:04,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:50:04,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:50:04,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:50:04,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:50:04,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:50:04,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:50:04,387 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:50:04,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:50:04,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:50:04,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:50:04,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:50:04,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:50:04,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:50:04,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:50:04,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:50:04,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:50:04,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:50:04,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:50:04,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:50:04,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:50:04,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:50:04,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:50:04,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:50:04,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:50:04,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:50:04,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:50:04,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:50:04,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:50:04,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:50:04,437 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:50:04,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:50:04,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:50:04,441 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:50:04,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:50:04,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:50:04,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:50:04,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:50:04,443 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:50:04,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:50:04,444 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:50:04,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:50:04,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:50:04,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:50:04,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:50:04,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:50:04,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:50:04,445 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:50:04,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:50:04,445 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:50:04,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:50:04,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:50:04,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:50:04,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:50:04,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:50:04,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:50:04,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:50:04,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:50:04,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:50:04,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:50:04,448 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:50:04,448 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:50:04,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:50:04,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc [2022-07-21 08:50:04,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:50:04,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:50:04,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:50:04,736 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:50:04,736 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:50:04,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2022-07-21 08:50:04,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6138af89c/3998714f59de406699547189eb57eec6/FLAGadbced8c6 [2022-07-21 08:50:05,166 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:50:05,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2022-07-21 08:50:05,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6138af89c/3998714f59de406699547189eb57eec6/FLAGadbced8c6 [2022-07-21 08:50:05,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6138af89c/3998714f59de406699547189eb57eec6 [2022-07-21 08:50:05,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:50:05,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:50:05,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:50:05,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:50:05,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:50:05,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:05,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d16c23c 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 08:50:05,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:05" (1/1) ... [2022-07-21 08:50:05,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:50:05,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:50:05,861 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_06-cond_racing1.i[41322,41335] [2022-07-21 08:50:05,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:50:05,897 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:50:05,930 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_06-cond_racing1.i[41322,41335] [2022-07-21 08:50:05,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:50:05,997 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:50:05,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:05 WrapperNode [2022-07-21 08:50:05,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:50:05,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:50:05,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:50:05,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:50:06,003 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 08:50:06,029 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 08:50:06,053 INFO L137 Inliner]: procedures = 270, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2022-07-21 08:50:06,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:50:06,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:50:06,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:50:06,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:50:06,065 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 08:50:06,065 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 08:50:06,072 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 08:50:06,072 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 08:50:06,076 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 08:50:06,080 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 08:50:06,085 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 08:50:06,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:50:06,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:50:06,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:50:06,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:50:06,103 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 08:50:06,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:50:06,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:06,130 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 08:50:06,134 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 08:50:06,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:50:06,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:50:06,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:50:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:50:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:50:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:50:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-21 08:50:06,166 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-21 08:50:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:50:06,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:50:06,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:50:06,179 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 08:50:06,315 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:50:06,316 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:50:06,541 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:50:06,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:50:06,550 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-21 08:50:06,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:06 BoogieIcfgContainer [2022-07-21 08:50:06,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:50:06,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:50:06,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:50:06,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:50:06,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:50:05" (1/3) ... [2022-07-21 08:50:06,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd60121 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 08:50:06,556 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 08:50:06,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd60121 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 08:50:06,557 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 08:50:06,558 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2022-07-21 08:50:06,562 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:50:06,567 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:50:06,568 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:50:06,568 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:50:06,610 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:50:06,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 115 places, 127 transitions, 262 flow [2022-07-21 08:50:06,678 INFO L129 PetriNetUnfolder]: 23/172 cut-off events. [2022-07-21 08:50:06,678 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:06,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 172 events. 23/172 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 385 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2022-07-21 08:50:06,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 127 transitions, 262 flow [2022-07-21 08:50:06,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 122 transitions, 249 flow [2022-07-21 08:50:06,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:06,701 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@378d874d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@609c2cdc [2022-07-21 08:50:06,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:06,728 INFO L129 PetriNetUnfolder]: 8/107 cut-off events. [2022-07-21 08:50:06,729 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:06,729 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:06,730 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, 1, 1] [2022-07-21 08:50:06,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:06,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:06,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1000137301, now seen corresponding path program 1 times [2022-07-21 08:50:06,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:06,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169560991] [2022-07-21 08:50:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:06,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:06,867 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 08:50:06,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:06,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169560991] [2022-07-21 08:50:06,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169560991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:06,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:06,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:06,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431778152] [2022-07-21 08:50:06,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:06,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:06,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:06,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:06,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:06,905 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 127 [2022-07-21 08:50:06,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 122 transitions, 249 flow. Second operand has 2 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 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 08:50:06,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:06,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 127 [2022-07-21 08:50:06,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:06,939 INFO L129 PetriNetUnfolder]: 6/149 cut-off events. [2022-07-21 08:50:06,944 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:06,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 149 events. 6/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 316 event pairs, 0 based on Foata normal form. 16/153 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-07-21 08:50:06,945 INFO L132 encePairwiseOnDemand]: 116/127 looper letters, 1 selfloop transitions, 0 changer transitions 19/110 dead transitions. [2022-07-21 08:50:06,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 110 transitions, 227 flow [2022-07-21 08:50:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 238 transitions. [2022-07-21 08:50:06,954 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.937007874015748 [2022-07-21 08:50:06,955 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 238 transitions. [2022-07-21 08:50:06,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 238 transitions. [2022-07-21 08:50:06,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:06,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 238 transitions. [2022-07-21 08:50:06,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 119.0) internal successors, (238), 2 states have internal predecessors, (238), 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 L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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 L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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 08:50:06,964 INFO L186 Difference]: Start difference. First operand has 111 places, 122 transitions, 249 flow. Second operand 2 states and 238 transitions. [2022-07-21 08:50:06,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 110 transitions, 227 flow [2022-07-21 08:50:06,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 110 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:06,970 INFO L242 Difference]: Finished difference. Result has 111 places, 91 transitions, 187 flow [2022-07-21 08:50:06,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=187, PETRI_PLACES=111, PETRI_TRANSITIONS=91} [2022-07-21 08:50:06,975 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 0 predicate places. [2022-07-21 08:50:06,975 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 91 transitions, 187 flow [2022-07-21 08:50:06,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 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 08:50:06,976 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:06,976 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, 1, 1] [2022-07-21 08:50:06,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:50:06,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:06,977 INFO L85 PathProgramCache]: Analyzing trace with hash 706734294, now seen corresponding path program 1 times [2022-07-21 08:50:06,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:06,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5806570] [2022-07-21 08:50:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:07,051 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 08:50:07,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:07,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5806570] [2022-07-21 08:50:07,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5806570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:07,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:07,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:07,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665893410] [2022-07-21 08:50:07,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:07,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:07,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:07,055 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 127 [2022-07-21 08:50:07,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 91 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 08:50:07,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:07,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 127 [2022-07-21 08:50:07,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:07,084 INFO L129 PetriNetUnfolder]: 1/95 cut-off events. [2022-07-21 08:50:07,084 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:07,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 95 events. 1/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 108. Up to 6 conditions per place. [2022-07-21 08:50:07,085 INFO L132 encePairwiseOnDemand]: 124/127 looper letters, 8 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2022-07-21 08:50:07,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 211 flow [2022-07-21 08:50:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2022-07-21 08:50:07,088 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.863517060367454 [2022-07-21 08:50:07,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2022-07-21 08:50:07,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2022-07-21 08:50:07,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:07,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2022-07-21 08:50:07,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 08:50:07,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 08:50:07,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 08:50:07,097 INFO L186 Difference]: Start difference. First operand has 111 places, 91 transitions, 187 flow. Second operand 3 states and 329 transitions. [2022-07-21 08:50:07,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 211 flow [2022-07-21 08:50:07,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 93 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:07,099 INFO L242 Difference]: Finished difference. Result has 97 places, 91 transitions, 195 flow [2022-07-21 08:50:07,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=97, PETRI_TRANSITIONS=91} [2022-07-21 08:50:07,111 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, -14 predicate places. [2022-07-21 08:50:07,111 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 91 transitions, 195 flow [2022-07-21 08:50:07,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 08:50:07,112 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:07,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:07,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:50:07,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1070178912, now seen corresponding path program 1 times [2022-07-21 08:50:07,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:07,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054352015] [2022-07-21 08:50:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:07,162 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:07,220 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:07,221 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:07,221 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:07,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:07,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:50:07,224 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:50:07,226 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:07,226 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:50:07,243 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 08:50:07,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 157 transitions, 332 flow [2022-07-21 08:50:07,282 INFO L129 PetriNetUnfolder]: 40/272 cut-off events. [2022-07-21 08:50:07,282 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:50:07,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 272 events. 40/272 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 771 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 174. Up to 9 conditions per place. [2022-07-21 08:50:07,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 157 transitions, 332 flow [2022-07-21 08:50:07,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 157 transitions, 332 flow [2022-07-21 08:50:07,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:07,299 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@378d874d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@609c2cdc [2022-07-21 08:50:07,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:07,310 INFO L129 PetriNetUnfolder]: 8/108 cut-off events. [2022-07-21 08:50:07,311 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:07,311 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:07,311 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, 1, 1] [2022-07-21 08:50:07,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash -38755054, now seen corresponding path program 1 times [2022-07-21 08:50:07,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:07,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637951754] [2022-07-21 08:50:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:07,351 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 08:50:07,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:07,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637951754] [2022-07-21 08:50:07,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637951754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:07,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:07,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:07,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304708232] [2022-07-21 08:50:07,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:07,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:07,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:07,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:07,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:07,355 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 157 [2022-07-21 08:50:07,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 157 transitions, 332 flow. Second operand has 2 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 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 08:50:07,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:07,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 157 [2022-07-21 08:50:07,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:07,392 INFO L129 PetriNetUnfolder]: 12/241 cut-off events. [2022-07-21 08:50:07,392 INFO L130 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-07-21 08:50:07,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 241 events. 12/241 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 670 event pairs, 0 based on Foata normal form. 42/264 useless extension candidates. Maximal degree in co-relation 158. Up to 7 conditions per place. [2022-07-21 08:50:07,394 INFO L132 encePairwiseOnDemand]: 140/157 looper letters, 2 selfloop transitions, 0 changer transitions 25/139 dead transitions. [2022-07-21 08:50:07,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 139 transitions, 304 flow [2022-07-21 08:50:07,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:07,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 291 transitions. [2022-07-21 08:50:07,416 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9267515923566879 [2022-07-21 08:50:07,418 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 291 transitions. [2022-07-21 08:50:07,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 291 transitions. [2022-07-21 08:50:07,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:07,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 291 transitions. [2022-07-21 08:50:07,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 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 08:50:07,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 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 08:50:07,422 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 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 08:50:07,422 INFO L186 Difference]: Start difference. First operand has 140 places, 157 transitions, 332 flow. Second operand 2 states and 291 transitions. [2022-07-21 08:50:07,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 139 transitions, 304 flow [2022-07-21 08:50:07,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 139 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:07,425 INFO L242 Difference]: Finished difference. Result has 140 places, 114 transitions, 240 flow [2022-07-21 08:50:07,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=240, PETRI_PLACES=140, PETRI_TRANSITIONS=114} [2022-07-21 08:50:07,426 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 0 predicate places. [2022-07-21 08:50:07,426 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 114 transitions, 240 flow [2022-07-21 08:50:07,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 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 08:50:07,426 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:07,427 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, 1, 1] [2022-07-21 08:50:07,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:50:07,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:07,428 INFO L85 PathProgramCache]: Analyzing trace with hash -332158061, now seen corresponding path program 1 times [2022-07-21 08:50:07,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:07,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811207604] [2022-07-21 08:50:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:07,482 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 08:50:07,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:07,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811207604] [2022-07-21 08:50:07,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811207604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:07,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:07,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:07,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948221278] [2022-07-21 08:50:07,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:07,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:07,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:07,485 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 157 [2022-07-21 08:50:07,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 114 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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 08:50:07,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:07,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 157 [2022-07-21 08:50:07,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:07,518 INFO L129 PetriNetUnfolder]: 2/143 cut-off events. [2022-07-21 08:50:07,518 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:50:07,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 143 events. 2/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 232 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 166. Up to 12 conditions per place. [2022-07-21 08:50:07,519 INFO L132 encePairwiseOnDemand]: 154/157 looper letters, 11 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2022-07-21 08:50:07,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 118 transitions, 274 flow [2022-07-21 08:50:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2022-07-21 08:50:07,524 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8450106157112527 [2022-07-21 08:50:07,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2022-07-21 08:50:07,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2022-07-21 08:50:07,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:07,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2022-07-21 08:50:07,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 08:50:07,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 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 08:50:07,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 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 08:50:07,528 INFO L186 Difference]: Start difference. First operand has 140 places, 114 transitions, 240 flow. Second operand 3 states and 398 transitions. [2022-07-21 08:50:07,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 118 transitions, 274 flow [2022-07-21 08:50:07,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 118 transitions, 272 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:07,530 INFO L242 Difference]: Finished difference. Result has 122 places, 115 transitions, 250 flow [2022-07-21 08:50:07,531 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=122, PETRI_TRANSITIONS=115} [2022-07-21 08:50:07,531 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, -18 predicate places. [2022-07-21 08:50:07,531 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 115 transitions, 250 flow [2022-07-21 08:50:07,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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 08:50:07,532 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:07,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:07,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:50:07,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:07,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2039958608, now seen corresponding path program 1 times [2022-07-21 08:50:07,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:07,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959502197] [2022-07-21 08:50:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:07,602 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 08:50:07,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:07,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959502197] [2022-07-21 08:50:07,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959502197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:07,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125589496] [2022-07-21 08:50:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:07,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:07,606 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 08:50:07,639 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 08:50:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:50:07,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:50:07,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:50:07,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125589496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:07,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:50:07,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 08:50:07,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485004517] [2022-07-21 08:50:07,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:07,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:07,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:50:07,718 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 157 [2022-07-21 08:50:07,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 115 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 08:50:07,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:07,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 157 [2022-07-21 08:50:07,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:07,747 INFO L129 PetriNetUnfolder]: 0/145 cut-off events. [2022-07-21 08:50:07,748 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 08:50:07,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 145 events. 0/145 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 249 event pairs, 0 based on Foata normal form. 2/145 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-21 08:50:07,748 INFO L132 encePairwiseOnDemand]: 155/157 looper letters, 6 selfloop transitions, 0 changer transitions 1/115 dead transitions. [2022-07-21 08:50:07,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 115 transitions, 264 flow [2022-07-21 08:50:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:07,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2022-07-21 08:50:07,750 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8259023354564756 [2022-07-21 08:50:07,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2022-07-21 08:50:07,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2022-07-21 08:50:07,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:07,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2022-07-21 08:50:07,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 08:50:07,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 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 08:50:07,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 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 08:50:07,754 INFO L186 Difference]: Start difference. First operand has 122 places, 115 transitions, 250 flow. Second operand 3 states and 389 transitions. [2022-07-21 08:50:07,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 115 transitions, 264 flow [2022-07-21 08:50:07,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 115 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:07,758 INFO L242 Difference]: Finished difference. Result has 124 places, 114 transitions, 248 flow [2022-07-21 08:50:07,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=124, PETRI_TRANSITIONS=114} [2022-07-21 08:50:07,766 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, -16 predicate places. [2022-07-21 08:50:07,766 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 114 transitions, 248 flow [2022-07-21 08:50:07,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 08:50:07,771 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:07,772 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:07,790 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 08:50:07,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 08:50:07,984 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -313844173, now seen corresponding path program 1 times [2022-07-21 08:50:07,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:07,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84927638] [2022-07-21 08:50:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:07,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:08,010 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:08,029 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:08,030 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:08,030 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:08,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:08,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:50:08,030 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:50:08,031 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:08,031 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:50:08,048 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:50:08,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 165 places, 187 transitions, 404 flow [2022-07-21 08:50:08,089 INFO L129 PetriNetUnfolder]: 62/405 cut-off events. [2022-07-21 08:50:08,091 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-21 08:50:08,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 405 events. 62/405 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1331 event pairs, 1 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 280. Up to 16 conditions per place. [2022-07-21 08:50:08,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 187 transitions, 404 flow [2022-07-21 08:50:08,099 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 187 transitions, 404 flow [2022-07-21 08:50:08,101 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:08,107 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@378d874d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@609c2cdc [2022-07-21 08:50:08,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:08,113 INFO L129 PetriNetUnfolder]: 8/110 cut-off events. [2022-07-21 08:50:08,113 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:08,116 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:08,116 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, 1, 1] [2022-07-21 08:50:08,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:08,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1350713042, now seen corresponding path program 1 times [2022-07-21 08:50:08,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:08,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294867004] [2022-07-21 08:50:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:08,171 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 08:50:08,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:08,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294867004] [2022-07-21 08:50:08,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294867004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:08,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:08,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:08,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026301896] [2022-07-21 08:50:08,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:08,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:08,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:08,177 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 187 [2022-07-21 08:50:08,177 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 187 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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 08:50:08,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:08,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 187 [2022-07-21 08:50:08,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:08,246 INFO L129 PetriNetUnfolder]: 16/333 cut-off events. [2022-07-21 08:50:08,247 INFO L130 PetriNetUnfolder]: For 73/157 co-relation queries the response was YES. [2022-07-21 08:50:08,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 333 events. 16/333 cut-off events. For 73/157 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1078 event pairs, 1 based on Foata normal form. 201/511 useless extension candidates. Maximal degree in co-relation 243. Up to 30 conditions per place. [2022-07-21 08:50:08,248 INFO L132 encePairwiseOnDemand]: 161/187 looper letters, 12 selfloop transitions, 2 changer transitions 26/167 dead transitions. [2022-07-21 08:50:08,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 167 transitions, 398 flow [2022-07-21 08:50:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2022-07-21 08:50:08,250 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8877005347593583 [2022-07-21 08:50:08,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2022-07-21 08:50:08,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2022-07-21 08:50:08,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:08,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2022-07-21 08:50:08,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 08:50:08,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 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 08:50:08,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 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 08:50:08,253 INFO L186 Difference]: Start difference. First operand has 165 places, 187 transitions, 404 flow. Second operand 3 states and 498 transitions. [2022-07-21 08:50:08,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 167 transitions, 398 flow [2022-07-21 08:50:08,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 167 transitions, 398 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:08,257 INFO L242 Difference]: Finished difference. Result has 167 places, 138 transitions, 307 flow [2022-07-21 08:50:08,257 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=167, PETRI_TRANSITIONS=138} [2022-07-21 08:50:08,258 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 2 predicate places. [2022-07-21 08:50:08,259 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 138 transitions, 307 flow [2022-07-21 08:50:08,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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 08:50:08,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:08,259 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:08,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:50:08,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash 523178535, now seen corresponding path program 1 times [2022-07-21 08:50:08,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:08,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609671484] [2022-07-21 08:50:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:08,323 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 08:50:08,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:08,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609671484] [2022-07-21 08:50:08,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609671484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:08,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668692632] [2022-07-21 08:50:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:08,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:08,326 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 08:50:08,327 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 08:50:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:08,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:50:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:50:08,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:50:08,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668692632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:08,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:50:08,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 08:50:08,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124664558] [2022-07-21 08:50:08,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:08,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:08,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:08,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:50:08,430 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 187 [2022-07-21 08:50:08,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 138 transitions, 307 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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 08:50:08,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:08,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 187 [2022-07-21 08:50:08,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:08,457 INFO L129 PetriNetUnfolder]: 0/194 cut-off events. [2022-07-21 08:50:08,458 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-21 08:50:08,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 194 events. 0/194 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 3/194 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-21 08:50:08,459 INFO L132 encePairwiseOnDemand]: 185/187 looper letters, 7 selfloop transitions, 0 changer transitions 1/138 dead transitions. [2022-07-21 08:50:08,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 138 transitions, 323 flow [2022-07-21 08:50:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2022-07-21 08:50:08,460 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8128342245989305 [2022-07-21 08:50:08,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2022-07-21 08:50:08,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2022-07-21 08:50:08,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:08,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2022-07-21 08:50:08,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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 08:50:08,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 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 08:50:08,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 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 08:50:08,464 INFO L186 Difference]: Start difference. First operand has 167 places, 138 transitions, 307 flow. Second operand 3 states and 456 transitions. [2022-07-21 08:50:08,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 138 transitions, 323 flow [2022-07-21 08:50:08,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 138 transitions, 315 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:08,467 INFO L242 Difference]: Finished difference. Result has 148 places, 137 transitions, 299 flow [2022-07-21 08:50:08,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=148, PETRI_TRANSITIONS=137} [2022-07-21 08:50:08,469 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, -17 predicate places. [2022-07-21 08:50:08,469 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 137 transitions, 299 flow [2022-07-21 08:50:08,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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 08:50:08,469 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:08,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:08,489 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 08:50:08,687 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,SelfDestructingSolverStorable8 [2022-07-21 08:50:08,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash -878662958, now seen corresponding path program 1 times [2022-07-21 08:50:08,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:08,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358804054] [2022-07-21 08:50:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:08,747 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 08:50:08,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:08,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358804054] [2022-07-21 08:50:08,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358804054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:08,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760347817] [2022-07-21 08:50:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:08,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:08,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:08,752 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 08:50:08,753 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 08:50:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:08,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:08,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:08,890 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 08:50:08,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:08,918 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 08:50:08,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760347817] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:08,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:08,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:08,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74753121] [2022-07-21 08:50:08,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:08,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:08,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:08,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:08,921 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 187 [2022-07-21 08:50:08,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 137 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 151.3) internal successors, (1513), 10 states have internal predecessors, (1513), 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 08:50:08,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:08,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 187 [2022-07-21 08:50:08,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:08,994 INFO L129 PetriNetUnfolder]: 0/158 cut-off events. [2022-07-21 08:50:08,994 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 08:50:08,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 158 events. 0/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 211 event pairs, 0 based on Foata normal form. 2/160 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-21 08:50:08,995 INFO L132 encePairwiseOnDemand]: 181/187 looper letters, 13 selfloop transitions, 9 changer transitions 0/147 dead transitions. [2022-07-21 08:50:08,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 147 transitions, 365 flow [2022-07-21 08:50:08,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1365 transitions. [2022-07-21 08:50:08,998 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8110516934046346 [2022-07-21 08:50:08,998 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1365 transitions. [2022-07-21 08:50:08,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1365 transitions. [2022-07-21 08:50:08,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:08,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1365 transitions. [2022-07-21 08:50:09,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.66666666666666) internal successors, (1365), 9 states have internal predecessors, (1365), 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 08:50:09,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 187.0) internal successors, (1870), 10 states have internal predecessors, (1870), 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 08:50:09,003 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 187.0) internal successors, (1870), 10 states have internal predecessors, (1870), 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 08:50:09,004 INFO L186 Difference]: Start difference. First operand has 148 places, 137 transitions, 299 flow. Second operand 9 states and 1365 transitions. [2022-07-21 08:50:09,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 147 transitions, 365 flow [2022-07-21 08:50:09,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 147 transitions, 363 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:09,006 INFO L242 Difference]: Finished difference. Result has 157 places, 143 transitions, 347 flow [2022-07-21 08:50:09,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=157, PETRI_TRANSITIONS=143} [2022-07-21 08:50:09,008 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, -8 predicate places. [2022-07-21 08:50:09,008 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 143 transitions, 347 flow [2022-07-21 08:50:09,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.3) internal successors, (1513), 10 states have internal predecessors, (1513), 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 08:50:09,009 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:09,009 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:09,029 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 08:50:09,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:09,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:09,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:09,224 INFO L85 PathProgramCache]: Analyzing trace with hash -734741859, now seen corresponding path program 1 times [2022-07-21 08:50:09,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:09,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137161673] [2022-07-21 08:50:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:09,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:09,249 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:09,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:09,280 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:09,280 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:09,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:09,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:50:09,281 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:50:09,281 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:09,281 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:50:09,307 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:50:09,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 478 flow [2022-07-21 08:50:09,357 INFO L129 PetriNetUnfolder]: 96/606 cut-off events. [2022-07-21 08:50:09,357 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 08:50:09,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 606 events. 96/606 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2290 event pairs, 6 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 425. Up to 32 conditions per place. [2022-07-21 08:50:09,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 217 transitions, 478 flow [2022-07-21 08:50:09,367 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 217 transitions, 478 flow [2022-07-21 08:50:09,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:09,369 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@378d874d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@609c2cdc [2022-07-21 08:50:09,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:09,375 INFO L129 PetriNetUnfolder]: 8/110 cut-off events. [2022-07-21 08:50:09,375 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:09,375 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:09,375 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, 1, 1] [2022-07-21 08:50:09,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1946036647, now seen corresponding path program 1 times [2022-07-21 08:50:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:09,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981480675] [2022-07-21 08:50:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:09,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:09,405 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 08:50:09,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:09,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981480675] [2022-07-21 08:50:09,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981480675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:09,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:09,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:09,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732065630] [2022-07-21 08:50:09,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:09,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:09,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:09,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:09,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:09,408 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 217 [2022-07-21 08:50:09,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 217 transitions, 478 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 08:50:09,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:09,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 217 [2022-07-21 08:50:09,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:09,487 INFO L129 PetriNetUnfolder]: 32/515 cut-off events. [2022-07-21 08:50:09,488 INFO L130 PetriNetUnfolder]: For 154/276 co-relation queries the response was YES. [2022-07-21 08:50:09,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 515 events. 32/515 cut-off events. For 154/276 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2056 event pairs, 6 based on Foata normal form. 435/914 useless extension candidates. Maximal degree in co-relation 387. Up to 56 conditions per place. [2022-07-21 08:50:09,491 INFO L132 encePairwiseOnDemand]: 185/217 looper letters, 13 selfloop transitions, 2 changer transitions 27/191 dead transitions. [2022-07-21 08:50:09,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 191 transitions, 464 flow [2022-07-21 08:50:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2022-07-21 08:50:09,493 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8786482334869432 [2022-07-21 08:50:09,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2022-07-21 08:50:09,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2022-07-21 08:50:09,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:09,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2022-07-21 08:50:09,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 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 08:50:09,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 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 08:50:09,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 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 08:50:09,496 INFO L186 Difference]: Start difference. First operand has 190 places, 217 transitions, 478 flow. Second operand 3 states and 572 transitions. [2022-07-21 08:50:09,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 191 transitions, 464 flow [2022-07-21 08:50:09,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 191 transitions, 464 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:09,500 INFO L242 Difference]: Finished difference. Result has 192 places, 161 transitions, 364 flow [2022-07-21 08:50:09,500 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=192, PETRI_TRANSITIONS=161} [2022-07-21 08:50:09,502 INFO L279 CegarLoopForPetriNet]: 190 programPoint places, 2 predicate places. [2022-07-21 08:50:09,502 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 161 transitions, 364 flow [2022-07-21 08:50:09,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 08:50:09,502 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:09,502 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:09,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:50:09,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash 787898396, now seen corresponding path program 1 times [2022-07-21 08:50:09,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:09,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333144197] [2022-07-21 08:50:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:09,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:09,538 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 08:50:09,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:09,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333144197] [2022-07-21 08:50:09,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333144197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:09,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392369458] [2022-07-21 08:50:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:09,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:09,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:09,541 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 08:50:09,571 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 08:50:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:09,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:50:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:50:09,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:50:09,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392369458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:09,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:50:09,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 08:50:09,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492422157] [2022-07-21 08:50:09,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:09,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:09,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:09,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:09,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:50:09,640 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 217 [2022-07-21 08:50:09,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 161 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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 08:50:09,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:09,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 217 [2022-07-21 08:50:09,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:09,667 INFO L129 PetriNetUnfolder]: 0/243 cut-off events. [2022-07-21 08:50:09,667 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-07-21 08:50:09,668 INFO L84 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 243 events. 0/243 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 621 event pairs, 0 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:50:09,668 INFO L132 encePairwiseOnDemand]: 215/217 looper letters, 8 selfloop transitions, 0 changer transitions 1/161 dead transitions. [2022-07-21 08:50:09,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 161 transitions, 382 flow [2022-07-21 08:50:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2022-07-21 08:50:09,669 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8033794162826421 [2022-07-21 08:50:09,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2022-07-21 08:50:09,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2022-07-21 08:50:09,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:09,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2022-07-21 08:50:09,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 08:50:09,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 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 08:50:09,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 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 08:50:09,672 INFO L186 Difference]: Start difference. First operand has 192 places, 161 transitions, 364 flow. Second operand 3 states and 523 transitions. [2022-07-21 08:50:09,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 161 transitions, 382 flow [2022-07-21 08:50:09,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 161 transitions, 368 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:09,674 INFO L242 Difference]: Finished difference. Result has 173 places, 160 transitions, 350 flow [2022-07-21 08:50:09,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=173, PETRI_TRANSITIONS=160} [2022-07-21 08:50:09,675 INFO L279 CegarLoopForPetriNet]: 190 programPoint places, -17 predicate places. [2022-07-21 08:50:09,675 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 160 transitions, 350 flow [2022-07-21 08:50:09,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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 08:50:09,675 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:09,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:09,694 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 08:50:09,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:09,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:09,884 INFO L85 PathProgramCache]: Analyzing trace with hash 114059943, now seen corresponding path program 1 times [2022-07-21 08:50:09,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:09,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77987448] [2022-07-21 08:50:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:09,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:09,925 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 08:50:09,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:09,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77987448] [2022-07-21 08:50:09,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77987448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:09,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785342522] [2022-07-21 08:50:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:09,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:09,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:09,927 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:50:09,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:50:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:10,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:10,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:10,031 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 08:50:10,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:10,085 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 08:50:10,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785342522] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:10,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:10,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:10,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794214486] [2022-07-21 08:50:10,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:10,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:10,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:10,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:10,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 217 [2022-07-21 08:50:10,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 160 transitions, 350 flow. Second operand has 10 states, 10 states have (on average 173.3) internal successors, (1733), 10 states have internal predecessors, (1733), 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 08:50:10,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:10,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 217 [2022-07-21 08:50:10,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:10,173 INFO L129 PetriNetUnfolder]: 0/205 cut-off events. [2022-07-21 08:50:10,174 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:50:10,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 205 events. 0/205 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 379 event pairs, 0 based on Foata normal form. 2/207 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-21 08:50:10,174 INFO L132 encePairwiseOnDemand]: 211/217 looper letters, 14 selfloop transitions, 9 changer transitions 0/170 dead transitions. [2022-07-21 08:50:10,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 418 flow [2022-07-21 08:50:10,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:10,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1564 transitions. [2022-07-21 08:50:10,178 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8008192524321557 [2022-07-21 08:50:10,178 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1564 transitions. [2022-07-21 08:50:10,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1564 transitions. [2022-07-21 08:50:10,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:10,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1564 transitions. [2022-07-21 08:50:10,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.77777777777777) internal successors, (1564), 9 states have internal predecessors, (1564), 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 08:50:10,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 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 08:50:10,184 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 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 08:50:10,185 INFO L186 Difference]: Start difference. First operand has 173 places, 160 transitions, 350 flow. Second operand 9 states and 1564 transitions. [2022-07-21 08:50:10,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 418 flow [2022-07-21 08:50:10,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 170 transitions, 416 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:10,187 INFO L242 Difference]: Finished difference. Result has 182 places, 166 transitions, 398 flow [2022-07-21 08:50:10,188 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=398, PETRI_PLACES=182, PETRI_TRANSITIONS=166} [2022-07-21 08:50:10,188 INFO L279 CegarLoopForPetriNet]: 190 programPoint places, -8 predicate places. [2022-07-21 08:50:10,188 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 166 transitions, 398 flow [2022-07-21 08:50:10,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 173.3) internal successors, (1733), 10 states have internal predecessors, (1733), 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 08:50:10,189 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:10,189 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:10,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 08:50:10,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 08:50:10,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:10,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:10,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1833944158, now seen corresponding path program 1 times [2022-07-21 08:50:10,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:10,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616081304] [2022-07-21 08:50:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:10,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:10,422 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:10,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:10,436 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:10,436 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:10,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:10,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 08:50:10,436 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:50:10,436 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:10,437 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:50:10,450 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-21 08:50:10,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 215 places, 247 transitions, 554 flow [2022-07-21 08:50:10,544 INFO L129 PetriNetUnfolder]: 158/947 cut-off events. [2022-07-21 08:50:10,544 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-21 08:50:10,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 947 events. 158/947 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4170 event pairs, 23 based on Foata normal form. 0/799 useless extension candidates. Maximal degree in co-relation 651. Up to 80 conditions per place. [2022-07-21 08:50:10,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 247 transitions, 554 flow [2022-07-21 08:50:10,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 247 transitions, 554 flow [2022-07-21 08:50:10,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:10,561 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@378d874d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@609c2cdc [2022-07-21 08:50:10,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:10,565 INFO L129 PetriNetUnfolder]: 9/107 cut-off events. [2022-07-21 08:50:10,565 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:10,566 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:10,566 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, 1, 1] [2022-07-21 08:50:10,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:10,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:10,566 INFO L85 PathProgramCache]: Analyzing trace with hash 968156414, now seen corresponding path program 1 times [2022-07-21 08:50:10,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:10,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285989816] [2022-07-21 08:50:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:10,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:10,580 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 08:50:10,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:10,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285989816] [2022-07-21 08:50:10,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285989816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:10,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:10,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:10,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499200908] [2022-07-21 08:50:10,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:10,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:10,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:10,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:10,582 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 247 [2022-07-21 08:50:10,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 247 transitions, 554 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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 08:50:10,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:10,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 247 [2022-07-21 08:50:10,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:10,719 INFO L129 PetriNetUnfolder]: 68/829 cut-off events. [2022-07-21 08:50:10,720 INFO L130 PetriNetUnfolder]: For 300/412 co-relation queries the response was YES. [2022-07-21 08:50:10,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 829 events. 68/829 cut-off events. For 300/412 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3978 event pairs, 23 based on Foata normal form. 880/1652 useless extension candidates. Maximal degree in co-relation 620. Up to 110 conditions per place. [2022-07-21 08:50:10,727 INFO L132 encePairwiseOnDemand]: 209/247 looper letters, 14 selfloop transitions, 2 changer transitions 28/215 dead transitions. [2022-07-21 08:50:10,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 215 transitions, 532 flow [2022-07-21 08:50:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2022-07-21 08:50:10,728 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8717948717948718 [2022-07-21 08:50:10,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2022-07-21 08:50:10,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2022-07-21 08:50:10,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:10,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2022-07-21 08:50:10,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 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 08:50:10,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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 08:50:10,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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 08:50:10,732 INFO L186 Difference]: Start difference. First operand has 215 places, 247 transitions, 554 flow. Second operand 3 states and 646 transitions. [2022-07-21 08:50:10,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 215 transitions, 532 flow [2022-07-21 08:50:10,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 215 transitions, 532 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:10,735 INFO L242 Difference]: Finished difference. Result has 217 places, 184 transitions, 423 flow [2022-07-21 08:50:10,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=217, PETRI_TRANSITIONS=184} [2022-07-21 08:50:10,736 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 2 predicate places. [2022-07-21 08:50:10,736 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 184 transitions, 423 flow [2022-07-21 08:50:10,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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 08:50:10,737 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:10,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:10,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 08:50:10,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:10,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:10,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1460849105, now seen corresponding path program 1 times [2022-07-21 08:50:10,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:10,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049102323] [2022-07-21 08:50:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:10,771 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 08:50:10,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049102323] [2022-07-21 08:50:10,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049102323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129969005] [2022-07-21 08:50:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:10,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:10,773 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:50:10,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:50:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:10,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:50:10,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:50:10,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:50:10,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129969005] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:10,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:50:10,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 08:50:10,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174145684] [2022-07-21 08:50:10,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:10,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:10,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:10,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:50:10,860 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 247 [2022-07-21 08:50:10,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 184 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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 08:50:10,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:10,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 247 [2022-07-21 08:50:10,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:10,894 INFO L129 PetriNetUnfolder]: 0/292 cut-off events. [2022-07-21 08:50:10,894 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-07-21 08:50:10,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 292 events. 0/292 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 802 event pairs, 0 based on Foata normal form. 5/292 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-21 08:50:10,895 INFO L132 encePairwiseOnDemand]: 245/247 looper letters, 9 selfloop transitions, 0 changer transitions 1/184 dead transitions. [2022-07-21 08:50:10,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 184 transitions, 443 flow [2022-07-21 08:50:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2022-07-21 08:50:10,897 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.796221322537112 [2022-07-21 08:50:10,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2022-07-21 08:50:10,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2022-07-21 08:50:10,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:10,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2022-07-21 08:50:10,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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 08:50:10,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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 08:50:10,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 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 08:50:10,901 INFO L186 Difference]: Start difference. First operand has 217 places, 184 transitions, 423 flow. Second operand 3 states and 590 transitions. [2022-07-21 08:50:10,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 184 transitions, 443 flow [2022-07-21 08:50:10,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 184 transitions, 421 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:10,904 INFO L242 Difference]: Finished difference. Result has 198 places, 183 transitions, 401 flow [2022-07-21 08:50:10,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=198, PETRI_TRANSITIONS=183} [2022-07-21 08:50:10,905 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, -17 predicate places. [2022-07-21 08:50:10,905 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 183 transitions, 401 flow [2022-07-21 08:50:10,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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 08:50:10,905 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:10,906 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:10,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:11,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 08:50:11,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash -563730726, now seen corresponding path program 1 times [2022-07-21 08:50:11,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:11,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914928277] [2022-07-21 08:50:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:11,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:11,160 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 08:50:11,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914928277] [2022-07-21 08:50:11,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914928277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:11,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790353954] [2022-07-21 08:50:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:11,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:11,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:11,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:50:11,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 08:50:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:11,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:11,261 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 08:50:11,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:11,285 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 08:50:11,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790353954] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:11,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:11,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:11,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831038895] [2022-07-21 08:50:11,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:11,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:11,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:11,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:11,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:11,289 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 247 [2022-07-21 08:50:11,291 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 183 transitions, 401 flow. Second operand has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 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 08:50:11,291 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:11,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 247 [2022-07-21 08:50:11,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:11,368 INFO L129 PetriNetUnfolder]: 0/252 cut-off events. [2022-07-21 08:50:11,369 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 08:50:11,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 252 events. 0/252 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 546 event pairs, 0 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:50:11,370 INFO L132 encePairwiseOnDemand]: 241/247 looper letters, 15 selfloop transitions, 9 changer transitions 0/193 dead transitions. [2022-07-21 08:50:11,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 193 transitions, 471 flow [2022-07-21 08:50:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1763 transitions. [2022-07-21 08:50:11,373 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930724246513721 [2022-07-21 08:50:11,373 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1763 transitions. [2022-07-21 08:50:11,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1763 transitions. [2022-07-21 08:50:11,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:11,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1763 transitions. [2022-07-21 08:50:11,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 195.88888888888889) internal successors, (1763), 9 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 08:50:11,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 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 08:50:11,380 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 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 08:50:11,380 INFO L186 Difference]: Start difference. First operand has 198 places, 183 transitions, 401 flow. Second operand 9 states and 1763 transitions. [2022-07-21 08:50:11,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 193 transitions, 471 flow [2022-07-21 08:50:11,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 193 transitions, 469 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:11,383 INFO L242 Difference]: Finished difference. Result has 207 places, 189 transitions, 449 flow [2022-07-21 08:50:11,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=449, PETRI_PLACES=207, PETRI_TRANSITIONS=189} [2022-07-21 08:50:11,383 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, -8 predicate places. [2022-07-21 08:50:11,384 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 189 transitions, 449 flow [2022-07-21 08:50:11,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 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 08:50:11,384 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:11,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:11,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:11,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:11,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash 504352831, now seen corresponding path program 1 times [2022-07-21 08:50:11,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:11,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840490849] [2022-07-21 08:50:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:11,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:11,670 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 08:50:11,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:11,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840490849] [2022-07-21 08:50:11,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840490849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:11,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:11,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:50:11,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766164525] [2022-07-21 08:50:11,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:11,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:50:11,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:11,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:50:11,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:50:11,673 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 247 [2022-07-21 08:50:11,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 189 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 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 08:50:11,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:11,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 247 [2022-07-21 08:50:11,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:38,228 INFO L129 PetriNetUnfolder]: 110509/245361 cut-off events. [2022-07-21 08:50:38,229 INFO L130 PetriNetUnfolder]: For 2354/2354 co-relation queries the response was YES. [2022-07-21 08:50:40,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389077 conditions, 245361 events. 110509/245361 cut-off events. For 2354/2354 co-relation queries the response was YES. Maximal size of possible extension queue 8896. Compared 3383195 event pairs, 63940 based on Foata normal form. 3875/244896 useless extension candidates. Maximal degree in co-relation 389065. Up to 88950 conditions per place. [2022-07-21 08:50:41,817 INFO L132 encePairwiseOnDemand]: 238/247 looper letters, 38 selfloop transitions, 6 changer transitions 65/268 dead transitions. [2022-07-21 08:50:41,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 268 transitions, 845 flow [2022-07-21 08:50:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:50:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 08:50:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1336 transitions. [2022-07-21 08:50:41,820 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.772700983227299 [2022-07-21 08:50:41,820 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1336 transitions. [2022-07-21 08:50:41,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1336 transitions. [2022-07-21 08:50:41,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:41,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1336 transitions. [2022-07-21 08:50:41,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.85714285714286) internal successors, (1336), 7 states have internal predecessors, (1336), 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 08:50:41,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 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 08:50:41,825 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 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 08:50:41,825 INFO L186 Difference]: Start difference. First operand has 207 places, 189 transitions, 449 flow. Second operand 7 states and 1336 transitions. [2022-07-21 08:50:41,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 268 transitions, 845 flow [2022-07-21 08:50:41,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 268 transitions, 839 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:41,829 INFO L242 Difference]: Finished difference. Result has 217 places, 194 transitions, 511 flow [2022-07-21 08:50:41,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=511, PETRI_PLACES=217, PETRI_TRANSITIONS=194} [2022-07-21 08:50:41,830 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 2 predicate places. [2022-07-21 08:50:41,830 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 194 transitions, 511 flow [2022-07-21 08:50:41,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 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 08:50:41,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:41,831 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, 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 08:50:41,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 08:50:41,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash -941502955, now seen corresponding path program 1 times [2022-07-21 08:50:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761789202] [2022-07-21 08:50:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:41,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761789202] [2022-07-21 08:50:41,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761789202] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615368120] [2022-07-21 08:50:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:41,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:41,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:41,891 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:50:41,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 08:50:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:41,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:50:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:42,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:50:42,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615368120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:42,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:42,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:50:42,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885375251] [2022-07-21 08:50:42,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:42,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:50:42,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:50:42,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:50:42,133 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 247 [2022-07-21 08:50:42,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 194 transitions, 511 flow. Second operand has 18 states, 18 states have (on average 195.61111111111111) internal successors, (3521), 18 states have internal predecessors, (3521), 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 08:50:42,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:42,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 247 [2022-07-21 08:50:42,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:42,299 INFO L129 PetriNetUnfolder]: 49/646 cut-off events. [2022-07-21 08:50:42,299 INFO L130 PetriNetUnfolder]: For 115/311 co-relation queries the response was YES. [2022-07-21 08:50:42,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 646 events. 49/646 cut-off events. For 115/311 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3370 event pairs, 23 based on Foata normal form. 3/632 useless extension candidates. Maximal degree in co-relation 962. Up to 81 conditions per place. [2022-07-21 08:50:42,307 INFO L132 encePairwiseOnDemand]: 242/247 looper letters, 18 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2022-07-21 08:50:42,307 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 194 transitions, 591 flow [2022-07-21 08:50:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:50:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:50:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3511 transitions. [2022-07-21 08:50:42,313 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7896986054880791 [2022-07-21 08:50:42,313 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3511 transitions. [2022-07-21 08:50:42,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3511 transitions. [2022-07-21 08:50:42,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:42,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3511 transitions. [2022-07-21 08:50:42,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 195.05555555555554) internal successors, (3511), 18 states have internal predecessors, (3511), 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 08:50:42,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 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 08:50:42,329 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 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 08:50:42,329 INFO L186 Difference]: Start difference. First operand has 217 places, 194 transitions, 511 flow. Second operand 18 states and 3511 transitions. [2022-07-21 08:50:42,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 194 transitions, 591 flow [2022-07-21 08:50:42,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 194 transitions, 554 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-07-21 08:50:42,332 INFO L242 Difference]: Finished difference. Result has 209 places, 185 transitions, 490 flow [2022-07-21 08:50:42,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=490, PETRI_PLACES=209, PETRI_TRANSITIONS=185} [2022-07-21 08:50:42,333 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, -6 predicate places. [2022-07-21 08:50:42,333 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 185 transitions, 490 flow [2022-07-21 08:50:42,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 195.61111111111111) internal successors, (3521), 18 states have internal predecessors, (3521), 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 08:50:42,334 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:42,334 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:50:42,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:42,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:42,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:42,544 INFO L85 PathProgramCache]: Analyzing trace with hash 240254198, now seen corresponding path program 1 times [2022-07-21 08:50:42,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:42,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688567874] [2022-07-21 08:50:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:42,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:42,561 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:42,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:42,580 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:42,580 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:50:42,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:50:42,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 08:50:42,580 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:50:42,581 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:42,581 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-21 08:50:42,597 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-21 08:50:42,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 240 places, 277 transitions, 632 flow [2022-07-21 08:50:42,737 INFO L129 PetriNetUnfolder]: 284/1576 cut-off events. [2022-07-21 08:50:42,737 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-21 08:50:42,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 1576 events. 284/1576 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8592 event pairs, 72 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 1046. Up to 192 conditions per place. [2022-07-21 08:50:42,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 240 places, 277 transitions, 632 flow [2022-07-21 08:50:42,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 240 places, 277 transitions, 632 flow [2022-07-21 08:50:42,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:42,775 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@378d874d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@609c2cdc [2022-07-21 08:50:42,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:50:42,778 INFO L129 PetriNetUnfolder]: 9/108 cut-off events. [2022-07-21 08:50:42,778 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:42,778 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:42,778 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, 1, 1] [2022-07-21 08:50:42,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:42,779 INFO L85 PathProgramCache]: Analyzing trace with hash 304016562, now seen corresponding path program 1 times [2022-07-21 08:50:42,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:42,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255602033] [2022-07-21 08:50:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:42,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:42,792 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 08:50:42,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:42,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255602033] [2022-07-21 08:50:42,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255602033] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:42,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:42,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:50:42,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447067012] [2022-07-21 08:50:42,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:42,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:50:42,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:42,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:50:42,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:50:42,794 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 277 [2022-07-21 08:50:42,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 277 transitions, 632 flow. Second operand has 2 states, 2 states have (on average 223.5) internal successors, (447), 2 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 08:50:42,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:42,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 277 [2022-07-21 08:50:42,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:42,972 INFO L129 PetriNetUnfolder]: 156/1441 cut-off events. [2022-07-21 08:50:42,973 INFO L130 PetriNetUnfolder]: For 654/684 co-relation queries the response was YES. [2022-07-21 08:50:42,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 1441 events. 156/1441 cut-off events. For 654/684 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8423 event pairs, 72 based on Foata normal form. 1314/2656 useless extension candidates. Maximal degree in co-relation 1039. Up to 199 conditions per place. [2022-07-21 08:50:42,992 INFO L132 encePairwiseOnDemand]: 236/277 looper letters, 6 selfloop transitions, 0 changer transitions 29/235 dead transitions. [2022-07-21 08:50:42,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 235 transitions, 572 flow [2022-07-21 08:50:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:50:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:50:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 499 transitions. [2022-07-21 08:50:42,994 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9007220216606499 [2022-07-21 08:50:42,994 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 499 transitions. [2022-07-21 08:50:42,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 499 transitions. [2022-07-21 08:50:42,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:42,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 499 transitions. [2022-07-21 08:50:42,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 249.5) internal successors, (499), 2 states have internal predecessors, (499), 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 08:50:42,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 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 08:50:42,996 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 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 08:50:42,996 INFO L186 Difference]: Start difference. First operand has 240 places, 277 transitions, 632 flow. Second operand 2 states and 499 transitions. [2022-07-21 08:50:42,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 235 transitions, 572 flow [2022-07-21 08:50:42,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 235 transitions, 572 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:43,000 INFO L242 Difference]: Finished difference. Result has 240 places, 206 transitions, 472 flow [2022-07-21 08:50:43,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=472, PETRI_PLACES=240, PETRI_TRANSITIONS=206} [2022-07-21 08:50:43,002 INFO L279 CegarLoopForPetriNet]: 240 programPoint places, 0 predicate places. [2022-07-21 08:50:43,002 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 206 transitions, 472 flow [2022-07-21 08:50:43,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 223.5) internal successors, (447), 2 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 08:50:43,002 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:43,002 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, 1, 1] [2022-07-21 08:50:43,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 08:50:43,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash 10613555, now seen corresponding path program 1 times [2022-07-21 08:50:43,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:43,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568430777] [2022-07-21 08:50:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:43,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:43,030 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 08:50:43,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:43,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568430777] [2022-07-21 08:50:43,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568430777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:43,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:43,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:50:43,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692138353] [2022-07-21 08:50:43,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:43,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:43,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:43,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:43,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:50:43,032 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 277 [2022-07-21 08:50:43,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 206 transitions, 472 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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 08:50:43,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:43,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 277 [2022-07-21 08:50:43,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:43,080 INFO L129 PetriNetUnfolder]: 6/335 cut-off events. [2022-07-21 08:50:43,080 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-21 08:50:43,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 335 events. 6/335 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 918 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 408. Up to 36 conditions per place. [2022-07-21 08:50:43,083 INFO L132 encePairwiseOnDemand]: 274/277 looper letters, 15 selfloop transitions, 2 changer transitions 0/210 dead transitions. [2022-07-21 08:50:43,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 210 transitions, 514 flow [2022-07-21 08:50:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2022-07-21 08:50:43,085 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8014440433212996 [2022-07-21 08:50:43,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2022-07-21 08:50:43,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2022-07-21 08:50:43,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:43,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2022-07-21 08:50:43,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 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 08:50:43,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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 08:50:43,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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 08:50:43,089 INFO L186 Difference]: Start difference. First operand has 240 places, 206 transitions, 472 flow. Second operand 3 states and 666 transitions. [2022-07-21 08:50:43,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 210 transitions, 514 flow [2022-07-21 08:50:43,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 210 transitions, 484 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:43,092 INFO L242 Difference]: Finished difference. Result has 222 places, 207 transitions, 454 flow [2022-07-21 08:50:43,092 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=454, PETRI_PLACES=222, PETRI_TRANSITIONS=207} [2022-07-21 08:50:43,093 INFO L279 CegarLoopForPetriNet]: 240 programPoint places, -18 predicate places. [2022-07-21 08:50:43,093 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 207 transitions, 454 flow [2022-07-21 08:50:43,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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 08:50:43,093 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:43,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:43,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 08:50:43,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:43,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:43,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1928096672, now seen corresponding path program 1 times [2022-07-21 08:50:43,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:43,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133844235] [2022-07-21 08:50:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:43,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:43,123 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 08:50:43,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:43,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133844235] [2022-07-21 08:50:43,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133844235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:43,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052431588] [2022-07-21 08:50:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:43,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:43,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:43,126 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:50:43,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 08:50:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:43,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:50:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:50:43,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:50:43,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052431588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:43,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:50:43,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 08:50:43,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687388859] [2022-07-21 08:50:43,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:43,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:50:43,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:43,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:50:43,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:50:43,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 277 [2022-07-21 08:50:43,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 207 transitions, 454 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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 08:50:43,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:43,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 277 [2022-07-21 08:50:43,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:43,255 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2022-07-21 08:50:43,255 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-21 08:50:43,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 341 events. 0/341 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 987 event pairs, 0 based on Foata normal form. 6/341 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-07-21 08:50:43,256 INFO L132 encePairwiseOnDemand]: 275/277 looper letters, 10 selfloop transitions, 0 changer transitions 1/207 dead transitions. [2022-07-21 08:50:43,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 207 transitions, 476 flow [2022-07-21 08:50:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:50:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:50:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 657 transitions. [2022-07-21 08:50:43,258 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7906137184115524 [2022-07-21 08:50:43,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 657 transitions. [2022-07-21 08:50:43,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 657 transitions. [2022-07-21 08:50:43,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:43,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 657 transitions. [2022-07-21 08:50:43,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 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 08:50:43,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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 08:50:43,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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 08:50:43,261 INFO L186 Difference]: Start difference. First operand has 222 places, 207 transitions, 454 flow. Second operand 3 states and 657 transitions. [2022-07-21 08:50:43,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 207 transitions, 476 flow [2022-07-21 08:50:43,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 207 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:43,264 INFO L242 Difference]: Finished difference. Result has 224 places, 206 transitions, 452 flow [2022-07-21 08:50:43,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=452, PETRI_PLACES=224, PETRI_TRANSITIONS=206} [2022-07-21 08:50:43,265 INFO L279 CegarLoopForPetriNet]: 240 programPoint places, -16 predicate places. [2022-07-21 08:50:43,265 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 206 transitions, 452 flow [2022-07-21 08:50:43,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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 08:50:43,266 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:43,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:43,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:43,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-21 08:50:43,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:43,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1382932331, now seen corresponding path program 1 times [2022-07-21 08:50:43,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:43,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203353846] [2022-07-21 08:50:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:43,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:43,508 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 08:50:43,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:43,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203353846] [2022-07-21 08:50:43,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203353846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:50:43,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574238841] [2022-07-21 08:50:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:43,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:50:43,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:43,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:50:43,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 08:50:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:43,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:50:43,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:50:43,623 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 08:50:43,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:50:43,645 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 08:50:43,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574238841] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:50:43,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:50:43,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:50:43,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992380384] [2022-07-21 08:50:43,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:50:43,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:50:43,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:43,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:50:43,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:50:43,649 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 277 [2022-07-21 08:50:43,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 206 transitions, 452 flow. Second operand has 10 states, 10 states have (on average 217.3) internal successors, (2173), 10 states have internal predecessors, (2173), 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 08:50:43,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:43,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 277 [2022-07-21 08:50:43,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:43,726 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2022-07-21 08:50:43,726 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:50:43,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 299 events. 0/299 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 715 event pairs, 0 based on Foata normal form. 2/301 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-21 08:50:43,727 INFO L132 encePairwiseOnDemand]: 271/277 looper letters, 16 selfloop transitions, 9 changer transitions 0/216 dead transitions. [2022-07-21 08:50:43,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 216 transitions, 524 flow [2022-07-21 08:50:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:50:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:50:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1962 transitions. [2022-07-21 08:50:43,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7870036101083032 [2022-07-21 08:50:43,730 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1962 transitions. [2022-07-21 08:50:43,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1962 transitions. [2022-07-21 08:50:43,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:43,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1962 transitions. [2022-07-21 08:50:43,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 218.0) internal successors, (1962), 9 states have internal predecessors, (1962), 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 08:50:43,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 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 08:50:43,738 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 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 08:50:43,738 INFO L186 Difference]: Start difference. First operand has 224 places, 206 transitions, 452 flow. Second operand 9 states and 1962 transitions. [2022-07-21 08:50:43,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 216 transitions, 524 flow [2022-07-21 08:50:43,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 216 transitions, 522 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-21 08:50:43,741 INFO L242 Difference]: Finished difference. Result has 233 places, 212 transitions, 500 flow [2022-07-21 08:50:43,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=500, PETRI_PLACES=233, PETRI_TRANSITIONS=212} [2022-07-21 08:50:43,742 INFO L279 CegarLoopForPetriNet]: 240 programPoint places, -7 predicate places. [2022-07-21 08:50:43,742 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 212 transitions, 500 flow [2022-07-21 08:50:43,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.3) internal successors, (2173), 10 states have internal predecessors, (2173), 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 08:50:43,742 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:43,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:43,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 08:50:43,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-21 08:50:43,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:50:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:43,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1385977400, now seen corresponding path program 1 times [2022-07-21 08:50:43,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:43,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305190030] [2022-07-21 08:50:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:43,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:44,018 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 08:50:44,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305190030] [2022-07-21 08:50:44,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305190030] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:44,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:44,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:50:44,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041232181] [2022-07-21 08:50:44,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:44,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:50:44,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:50:44,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:50:44,020 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 277 [2022-07-21 08:50:44,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 212 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 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 08:50:44,021 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:44,021 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 277 [2022-07-21 08:50:44,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand