./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_07-cond_racing2.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 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:17:31,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:17:31,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:17:31,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:17:31,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:17:31,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:17:31,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:17:31,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:17:31,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:17:31,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:17:31,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:17:31,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:17:31,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:17:31,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:17:31,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:17:31,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:17:31,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:17:31,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:17:31,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:17:31,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:17:31,201 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:17:31,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:17:31,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:17:31,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:17:31,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:17:31,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:17:31,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:17:31,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:17:31,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:17:31,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:17:31,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:17:31,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:17:31,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:17:31,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:17:31,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:17:31,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:17:31,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:17:31,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:17:31,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:17:31,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:17:31,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:17:31,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:17:31,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:17:31,255 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:17:31,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:17:31,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:17:31,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:17:31,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:17:31,257 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:17:31,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:17:31,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:17:31,258 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:17:31,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:17:31,259 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:17:31,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:17:31,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:17:31,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:17:31,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:17:31,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:17:31,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:17:31,260 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:17:31,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:17:31,261 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:17:31,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:17:31,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:17:31,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:17:31,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:17:31,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:17:31,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:17:31,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:17:31,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:17:31,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:17:31,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:17:31,263 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:17:31,263 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:17:31,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:17:31,264 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef [2022-07-19 21:17:31,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:17:31,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:17:31,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:17:31,467 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:17:31,468 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:17:31,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i [2022-07-19 21:17:31,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38c9dc8f5/c52ca12ca35d4140b6a495b6a6d804ba/FLAG0184b705a [2022-07-19 21:17:31,946 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:17:31,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i [2022-07-19 21:17:31,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38c9dc8f5/c52ca12ca35d4140b6a495b6a6d804ba/FLAG0184b705a [2022-07-19 21:17:31,979 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38c9dc8f5/c52ca12ca35d4140b6a495b6a6d804ba [2022-07-19 21:17:31,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:17:31,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:17:31,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:17:31,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:17:31,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:17:31,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:17:31" (1/1) ... [2022-07-19 21:17:31,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151ca919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:31, skipping insertion in model container [2022-07-19 21:17:31,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:17:31" (1/1) ... [2022-07-19 21:17:31,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:17:32,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:17:32,333 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_07-cond_racing2.i[41322,41335] [2022-07-19 21:17:32,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:17:32,364 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:17:32,394 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_07-cond_racing2.i[41322,41335] [2022-07-19 21:17:32,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:17:32,458 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:17:32,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32 WrapperNode [2022-07-19 21:17:32,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:17:32,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:17:32,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:17:32,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:17:32,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (1/1) ... [2022-07-19 21:17:32,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (1/1) ... [2022-07-19 21:17:32,507 INFO L137 Inliner]: procedures = 270, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-07-19 21:17:32,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:17:32,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:17:32,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:17:32,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:17:32,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (1/1) ... [2022-07-19 21:17:32,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (1/1) ... [2022-07-19 21:17:32,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (1/1) ... [2022-07-19 21:17:32,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (1/1) ... [2022-07-19 21:17:32,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (1/1) ... [2022-07-19 21:17:32,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (1/1) ... [2022-07-19 21:17:32,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (1/1) ... [2022-07-19 21:17:32,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:17:32,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:17:32,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:17:32,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:17:32,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (1/1) ... [2022-07-19 21:17:32,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:17:32,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:17:32,607 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) [2022-07-19 21:17:32,614 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 [2022-07-19 21:17:32,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:17:32,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:17:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:17:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:17:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:17:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:17:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-19 21:17:32,668 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-19 21:17:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:17:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:17:32,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:17:32,670 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:17:32,805 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:17:32,806 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:17:32,968 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:17:32,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:17:32,974 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-19 21:17:32,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:17:32 BoogieIcfgContainer [2022-07-19 21:17:32,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:17:32,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:17:32,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:17:32,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:17:32,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:17:31" (1/3) ... [2022-07-19 21:17:32,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53555790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:17:32, skipping insertion in model container [2022-07-19 21:17:32,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:17:32" (2/3) ... [2022-07-19 21:17:32,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53555790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:17:32, skipping insertion in model container [2022-07-19 21:17:32,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:17:32" (3/3) ... [2022-07-19 21:17:32,983 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2022-07-19 21:17:32,987 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:17:32,994 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:17:32,994 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:17:32,994 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:17:33,031 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:17:33,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 129 transitions, 266 flow [2022-07-19 21:17:33,103 INFO L129 PetriNetUnfolder]: 23/174 cut-off events. [2022-07-19 21:17:33,107 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:17:33,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 174 events. 23/174 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 389 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2022-07-19 21:17:33,114 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 129 transitions, 266 flow [2022-07-19 21:17:33,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 124 transitions, 253 flow [2022-07-19 21:17:33,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:17:33,143 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@e2341f3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e78e8bb [2022-07-19 21:17:33,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:17:33,174 INFO L129 PetriNetUnfolder]: 8/108 cut-off events. [2022-07-19 21:17:33,174 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:17:33,174 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:33,176 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] [2022-07-19 21:17:33,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:33,181 INFO L85 PathProgramCache]: Analyzing trace with hash -628241921, now seen corresponding path program 1 times [2022-07-19 21:17:33,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:33,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770768617] [2022-07-19 21:17:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:33,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:33,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:33,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770768617] [2022-07-19 21:17:33,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770768617] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:17:33,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:17:33,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:17:33,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994900635] [2022-07-19 21:17:33,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:17:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:17:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:33,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:17:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:17:33,440 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 129 [2022-07-19 21:17:33,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 124 transitions, 253 flow. Second operand has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,445 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:33,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 129 [2022-07-19 21:17:33,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:33,466 INFO L129 PetriNetUnfolder]: 6/151 cut-off events. [2022-07-19 21:17:33,466 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:17:33,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 151 events. 6/151 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 311 event pairs, 0 based on Foata normal form. 16/155 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2022-07-19 21:17:33,468 INFO L132 encePairwiseOnDemand]: 118/129 looper letters, 1 selfloop transitions, 0 changer transitions 19/112 dead transitions. [2022-07-19 21:17:33,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 112 transitions, 231 flow [2022-07-19 21:17:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:17:33,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:17:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 242 transitions. [2022-07-19 21:17:33,478 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.937984496124031 [2022-07-19 21:17:33,478 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 242 transitions. [2022-07-19 21:17:33,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 242 transitions. [2022-07-19 21:17:33,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:33,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 242 transitions. [2022-07-19 21:17:33,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2022-07-19 21:17:33,488 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2022-07-19 21:17:33,489 INFO L186 Difference]: Start difference. First operand has 113 places, 124 transitions, 253 flow. Second operand 2 states and 242 transitions. [2022-07-19 21:17:33,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 112 transitions, 231 flow [2022-07-19 21:17:33,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 112 transitions, 231 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:17:33,494 INFO L242 Difference]: Finished difference. Result has 113 places, 93 transitions, 191 flow [2022-07-19 21:17:33,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=191, PETRI_PLACES=113, PETRI_TRANSITIONS=93} [2022-07-19 21:17:33,499 INFO L279 CegarLoopForPetriNet]: 113 programPoint places, 0 predicate places. [2022-07-19 21:17:33,499 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 93 transitions, 191 flow [2022-07-19 21:17:33,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,499 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:33,500 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] [2022-07-19 21:17:33,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:17:33,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash -921644928, now seen corresponding path program 1 times [2022-07-19 21:17:33,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:33,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562089916] [2022-07-19 21:17:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:33,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:33,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:33,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562089916] [2022-07-19 21:17:33,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562089916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:17:33,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:17:33,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:17:33,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466024703] [2022-07-19 21:17:33,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:17:33,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:17:33,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:17:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:17:33,560 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 129 [2022-07-19 21:17:33,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 93 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:33,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 129 [2022-07-19 21:17:33,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:33,581 INFO L129 PetriNetUnfolder]: 1/97 cut-off events. [2022-07-19 21:17:33,581 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:17:33,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 97 events. 1/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-07-19 21:17:33,582 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 8 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2022-07-19 21:17:33,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 215 flow [2022-07-19 21:17:33,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:17:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:17:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2022-07-19 21:17:33,585 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8656330749354005 [2022-07-19 21:17:33,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2022-07-19 21:17:33,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2022-07-19 21:17:33,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:33,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2022-07-19 21:17:33,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,589 INFO L186 Difference]: Start difference. First operand has 113 places, 93 transitions, 191 flow. Second operand 3 states and 335 transitions. [2022-07-19 21:17:33,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 215 flow [2022-07-19 21:17:33,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 95 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:17:33,591 INFO L242 Difference]: Finished difference. Result has 99 places, 93 transitions, 199 flow [2022-07-19 21:17:33,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2022-07-19 21:17:33,592 INFO L279 CegarLoopForPetriNet]: 113 programPoint places, -14 predicate places. [2022-07-19 21:17:33,593 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 199 flow [2022-07-19 21:17:33,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,593 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:33,593 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, 1, 1] [2022-07-19 21:17:33,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:17:33,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:33,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:33,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1426448650, now seen corresponding path program 1 times [2022-07-19 21:17:33,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:33,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328023298] [2022-07-19 21:17:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:33,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:17:33,618 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:17:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:17:33,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:17:33,664 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:17:33,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:17:33,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:17:33,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:17:33,669 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:17:33,671 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:17:33,671 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:17:33,715 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:17:33,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 142 places, 159 transitions, 336 flow [2022-07-19 21:17:33,750 INFO L129 PetriNetUnfolder]: 40/274 cut-off events. [2022-07-19 21:17:33,750 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:17:33,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 274 events. 40/274 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 779 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 176. Up to 9 conditions per place. [2022-07-19 21:17:33,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 159 transitions, 336 flow [2022-07-19 21:17:33,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 159 transitions, 336 flow [2022-07-19 21:17:33,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:17:33,763 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@e2341f3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e78e8bb [2022-07-19 21:17:33,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:17:33,774 INFO L129 PetriNetUnfolder]: 9/115 cut-off events. [2022-07-19 21:17:33,775 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:17:33,775 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:33,775 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] [2022-07-19 21:17:33,775 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:33,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash -982098402, now seen corresponding path program 1 times [2022-07-19 21:17:33,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:33,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039182703] [2022-07-19 21:17:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:33,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:33,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:33,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039182703] [2022-07-19 21:17:33,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039182703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:17:33,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:17:33,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:17:33,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305372260] [2022-07-19 21:17:33,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:17:33,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:17:33,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:33,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:17:33,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:17:33,839 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 159 [2022-07-19 21:17:33,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 159 transitions, 336 flow. Second operand has 2 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:33,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 159 [2022-07-19 21:17:33,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:33,888 INFO L129 PetriNetUnfolder]: 12/243 cut-off events. [2022-07-19 21:17:33,888 INFO L130 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-07-19 21:17:33,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 243 events. 12/243 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 674 event pairs, 0 based on Foata normal form. 42/266 useless extension candidates. Maximal degree in co-relation 160. Up to 7 conditions per place. [2022-07-19 21:17:33,889 INFO L132 encePairwiseOnDemand]: 142/159 looper letters, 2 selfloop transitions, 0 changer transitions 25/141 dead transitions. [2022-07-19 21:17:33,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 141 transitions, 308 flow [2022-07-19 21:17:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:17:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:17:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 295 transitions. [2022-07-19 21:17:33,895 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9276729559748428 [2022-07-19 21:17:33,896 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 295 transitions. [2022-07-19 21:17:33,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 295 transitions. [2022-07-19 21:17:33,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:33,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 295 transitions. [2022-07-19 21:17:33,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,902 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,902 INFO L186 Difference]: Start difference. First operand has 142 places, 159 transitions, 336 flow. Second operand 2 states and 295 transitions. [2022-07-19 21:17:33,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 141 transitions, 308 flow [2022-07-19 21:17:33,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 141 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:17:33,909 INFO L242 Difference]: Finished difference. Result has 142 places, 116 transitions, 244 flow [2022-07-19 21:17:33,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=244, PETRI_PLACES=142, PETRI_TRANSITIONS=116} [2022-07-19 21:17:33,911 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 0 predicate places. [2022-07-19 21:17:33,911 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 116 transitions, 244 flow [2022-07-19 21:17:33,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,912 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:33,912 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] [2022-07-19 21:17:33,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:17:33,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1275501409, now seen corresponding path program 1 times [2022-07-19 21:17:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:33,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639138196] [2022-07-19 21:17:33,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:33,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:33,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639138196] [2022-07-19 21:17:33,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639138196] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:17:33,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:17:33,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:17:33,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568741612] [2022-07-19 21:17:33,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:17:33,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:17:33,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:17:33,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:17:33,972 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 159 [2022-07-19 21:17:33,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 116 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:33,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:33,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 159 [2022-07-19 21:17:33,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:34,004 INFO L129 PetriNetUnfolder]: 2/145 cut-off events. [2022-07-19 21:17:34,004 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:17:34,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 145 events. 2/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2022-07-19 21:17:34,005 INFO L132 encePairwiseOnDemand]: 156/159 looper letters, 11 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2022-07-19 21:17:34,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 120 transitions, 278 flow [2022-07-19 21:17:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:17:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:17:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2022-07-19 21:17:34,007 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8469601677148847 [2022-07-19 21:17:34,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2022-07-19 21:17:34,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2022-07-19 21:17:34,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:34,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2022-07-19 21:17:34,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,010 INFO L186 Difference]: Start difference. First operand has 142 places, 116 transitions, 244 flow. Second operand 3 states and 404 transitions. [2022-07-19 21:17:34,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 120 transitions, 278 flow [2022-07-19 21:17:34,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 120 transitions, 276 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:17:34,014 INFO L242 Difference]: Finished difference. Result has 124 places, 117 transitions, 254 flow [2022-07-19 21:17:34,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=124, PETRI_TRANSITIONS=117} [2022-07-19 21:17:34,015 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, -18 predicate places. [2022-07-19 21:17:34,016 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 117 transitions, 254 flow [2022-07-19 21:17:34,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,016 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:34,016 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] [2022-07-19 21:17:34,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:17:34,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1056172317, now seen corresponding path program 1 times [2022-07-19 21:17:34,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:34,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763066665] [2022-07-19 21:17:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:34,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:34,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:34,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763066665] [2022-07-19 21:17:34,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763066665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:17:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810787559] [2022-07-19 21:17:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:34,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:17:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:17:34,093 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) [2022-07-19 21:17:34,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:17:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:17:34,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:17:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:34,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:17:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:34,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810787559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:17:34,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:17:34,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:17:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774791044] [2022-07-19 21:17:34,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:17:34,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:17:34,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:34,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:17:34,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:17:34,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 159 [2022-07-19 21:17:34,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 117 transitions, 254 flow. Second operand has 10 states, 10 states have (on average 131.3) internal successors, (1313), 10 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:34,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 159 [2022-07-19 21:17:34,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:34,356 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2022-07-19 21:17:34,357 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:17:34,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 113 events. 0/113 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 2/115 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-19 21:17:34,357 INFO L132 encePairwiseOnDemand]: 154/159 looper letters, 9 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2022-07-19 21:17:34,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 107 transitions, 264 flow [2022-07-19 21:17:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:17:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:17:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1179 transitions. [2022-07-19 21:17:34,360 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8238993710691824 [2022-07-19 21:17:34,360 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1179 transitions. [2022-07-19 21:17:34,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1179 transitions. [2022-07-19 21:17:34,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:34,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1179 transitions. [2022-07-19 21:17:34,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,366 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,366 INFO L186 Difference]: Start difference. First operand has 124 places, 117 transitions, 254 flow. Second operand 9 states and 1179 transitions. [2022-07-19 21:17:34,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 107 transitions, 264 flow [2022-07-19 21:17:34,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 107 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:17:34,368 INFO L242 Difference]: Finished difference. Result has 116 places, 103 transitions, 236 flow [2022-07-19 21:17:34,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=236, PETRI_PLACES=116, PETRI_TRANSITIONS=103} [2022-07-19 21:17:34,371 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, -26 predicate places. [2022-07-19 21:17:34,371 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 103 transitions, 236 flow [2022-07-19 21:17:34,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.3) internal successors, (1313), 10 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,372 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:34,372 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, 1, 1] [2022-07-19 21:17:34,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:17:34,605 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 [2022-07-19 21:17:34,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1133667776, now seen corresponding path program 1 times [2022-07-19 21:17:34,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:34,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136768281] [2022-07-19 21:17:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:34,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:17:34,633 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:17:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:17:34,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:17:34,665 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:17:34,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:17:34,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:17:34,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:17:34,665 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:17:34,666 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:17:34,666 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:17:34,691 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:17:34,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 167 places, 189 transitions, 408 flow [2022-07-19 21:17:34,731 INFO L129 PetriNetUnfolder]: 62/407 cut-off events. [2022-07-19 21:17:34,731 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:17:34,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 407 events. 62/407 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1326 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 282. Up to 16 conditions per place. [2022-07-19 21:17:34,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 189 transitions, 408 flow [2022-07-19 21:17:34,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 189 transitions, 408 flow [2022-07-19 21:17:34,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:17:34,741 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@e2341f3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e78e8bb [2022-07-19 21:17:34,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:17:34,746 INFO L129 PetriNetUnfolder]: 8/107 cut-off events. [2022-07-19 21:17:34,747 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:17:34,747 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:34,747 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] [2022-07-19 21:17:34,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash 734990300, now seen corresponding path program 1 times [2022-07-19 21:17:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:34,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094041721] [2022-07-19 21:17:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:34,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:34,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:34,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094041721] [2022-07-19 21:17:34,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094041721] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:17:34,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:17:34,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:17:34,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732882419] [2022-07-19 21:17:34,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:17:34,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:17:34,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:34,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:17:34,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:17:34,793 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 189 [2022-07-19 21:17:34,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 189 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:34,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 189 [2022-07-19 21:17:34,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:34,865 INFO L129 PetriNetUnfolder]: 16/335 cut-off events. [2022-07-19 21:17:34,865 INFO L130 PetriNetUnfolder]: For 49/87 co-relation queries the response was YES. [2022-07-19 21:17:34,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 335 events. 16/335 cut-off events. For 49/87 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1072 event pairs, 1 based on Foata normal form. 201/513 useless extension candidates. Maximal degree in co-relation 245. Up to 30 conditions per place. [2022-07-19 21:17:34,866 INFO L132 encePairwiseOnDemand]: 163/189 looper letters, 12 selfloop transitions, 2 changer transitions 26/169 dead transitions. [2022-07-19 21:17:34,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 169 transitions, 402 flow [2022-07-19 21:17:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:17:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:17:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2022-07-19 21:17:34,868 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2022-07-19 21:17:34,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2022-07-19 21:17:34,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2022-07-19 21:17:34,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:34,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2022-07-19 21:17:34,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,874 INFO L186 Difference]: Start difference. First operand has 167 places, 189 transitions, 408 flow. Second operand 3 states and 504 transitions. [2022-07-19 21:17:34,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 169 transitions, 402 flow [2022-07-19 21:17:34,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 169 transitions, 402 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:17:34,878 INFO L242 Difference]: Finished difference. Result has 169 places, 140 transitions, 311 flow [2022-07-19 21:17:34,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=169, PETRI_TRANSITIONS=140} [2022-07-19 21:17:34,879 INFO L279 CegarLoopForPetriNet]: 167 programPoint places, 2 predicate places. [2022-07-19 21:17:34,879 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 140 transitions, 311 flow [2022-07-19 21:17:34,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:34,879 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:34,879 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] [2022-07-19 21:17:34,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:17:34,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1246462806, now seen corresponding path program 1 times [2022-07-19 21:17:34,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:34,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772345560] [2022-07-19 21:17:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:34,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:34,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:34,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772345560] [2022-07-19 21:17:34,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772345560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:17:34,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582627626] [2022-07-19 21:17:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:34,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:17:34,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:17:34,944 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) [2022-07-19 21:17:34,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:17:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:35,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:17:35,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:17:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:35,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:17:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:35,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582627626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:17:35,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:17:35,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:17:35,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505904801] [2022-07-19 21:17:35,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:17:35,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:17:35,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:17:35,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:17:35,089 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 189 [2022-07-19 21:17:35,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 140 transitions, 311 flow. Second operand has 10 states, 10 states have (on average 153.3) internal successors, (1533), 10 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:35,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 189 [2022-07-19 21:17:35,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:35,159 INFO L129 PetriNetUnfolder]: 1/161 cut-off events. [2022-07-19 21:17:35,159 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:17:35,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 161 events. 1/161 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 220 event pairs, 0 based on Foata normal form. 2/162 useless extension candidates. Maximal degree in co-relation 137. Up to 7 conditions per place. [2022-07-19 21:17:35,160 INFO L132 encePairwiseOnDemand]: 183/189 looper letters, 13 selfloop transitions, 9 changer transitions 0/150 dead transitions. [2022-07-19 21:17:35,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 150 transitions, 377 flow [2022-07-19 21:17:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:17:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:17:35,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1383 transitions. [2022-07-19 21:17:35,162 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8130511463844797 [2022-07-19 21:17:35,162 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1383 transitions. [2022-07-19 21:17:35,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1383 transitions. [2022-07-19 21:17:35,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:35,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1383 transitions. [2022-07-19 21:17:35,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.66666666666666) internal successors, (1383), 9 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,168 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,168 INFO L186 Difference]: Start difference. First operand has 169 places, 140 transitions, 311 flow. Second operand 9 states and 1383 transitions. [2022-07-19 21:17:35,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 150 transitions, 377 flow [2022-07-19 21:17:35,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 150 transitions, 369 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-19 21:17:35,170 INFO L242 Difference]: Finished difference. Result has 158 places, 146 transitions, 353 flow [2022-07-19 21:17:35,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=353, PETRI_PLACES=158, PETRI_TRANSITIONS=146} [2022-07-19 21:17:35,171 INFO L279 CegarLoopForPetriNet]: 167 programPoint places, -9 predicate places. [2022-07-19 21:17:35,171 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 146 transitions, 353 flow [2022-07-19 21:17:35,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.3) internal successors, (1533), 10 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,172 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:35,172 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, 1, 1] [2022-07-19 21:17:35,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:17:35,389 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 [2022-07-19 21:17:35,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:35,389 INFO L85 PathProgramCache]: Analyzing trace with hash 94495693, now seen corresponding path program 1 times [2022-07-19 21:17:35,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:35,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060799887] [2022-07-19 21:17:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:35,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:17:35,403 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:17:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:17:35,416 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:17:35,416 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:17:35,416 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:17:35,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:17:35,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:17:35,416 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:17:35,417 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:17:35,417 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:17:35,431 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:17:35,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 482 flow [2022-07-19 21:17:35,487 INFO L129 PetriNetUnfolder]: 96/608 cut-off events. [2022-07-19 21:17:35,487 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-19 21:17:35,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 608 events. 96/608 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2267 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 427. Up to 32 conditions per place. [2022-07-19 21:17:35,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 219 transitions, 482 flow [2022-07-19 21:17:35,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 219 transitions, 482 flow [2022-07-19 21:17:35,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:17:35,497 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@e2341f3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e78e8bb [2022-07-19 21:17:35,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:17:35,502 INFO L129 PetriNetUnfolder]: 8/113 cut-off events. [2022-07-19 21:17:35,502 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:17:35,502 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:35,502 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] [2022-07-19 21:17:35,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash 814862903, now seen corresponding path program 1 times [2022-07-19 21:17:35,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:35,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514256837] [2022-07-19 21:17:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:35,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:35,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:35,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514256837] [2022-07-19 21:17:35,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514256837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:17:35,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:17:35,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:17:35,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525610786] [2022-07-19 21:17:35,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:17:35,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:17:35,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:17:35,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:17:35,520 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 219 [2022-07-19 21:17:35,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 219 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:35,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 219 [2022-07-19 21:17:35,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:35,596 INFO L129 PetriNetUnfolder]: 32/517 cut-off events. [2022-07-19 21:17:35,596 INFO L130 PetriNetUnfolder]: For 148/265 co-relation queries the response was YES. [2022-07-19 21:17:35,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 517 events. 32/517 cut-off events. For 148/265 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2057 event pairs, 6 based on Foata normal form. 435/916 useless extension candidates. Maximal degree in co-relation 389. Up to 56 conditions per place. [2022-07-19 21:17:35,600 INFO L132 encePairwiseOnDemand]: 187/219 looper letters, 13 selfloop transitions, 2 changer transitions 27/193 dead transitions. [2022-07-19 21:17:35,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 193 transitions, 468 flow [2022-07-19 21:17:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:17:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:17:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2022-07-19 21:17:35,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8797564687975646 [2022-07-19 21:17:35,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2022-07-19 21:17:35,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2022-07-19 21:17:35,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:35,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2022-07-19 21:17:35,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,604 INFO L186 Difference]: Start difference. First operand has 192 places, 219 transitions, 482 flow. Second operand 3 states and 578 transitions. [2022-07-19 21:17:35,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 193 transitions, 468 flow [2022-07-19 21:17:35,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 193 transitions, 468 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:17:35,607 INFO L242 Difference]: Finished difference. Result has 194 places, 163 transitions, 368 flow [2022-07-19 21:17:35,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=368, PETRI_PLACES=194, PETRI_TRANSITIONS=163} [2022-07-19 21:17:35,608 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 2 predicate places. [2022-07-19 21:17:35,608 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 163 transitions, 368 flow [2022-07-19 21:17:35,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:35,609 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] [2022-07-19 21:17:35,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:17:35,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:35,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:35,609 INFO L85 PathProgramCache]: Analyzing trace with hash -233760275, now seen corresponding path program 1 times [2022-07-19 21:17:35,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:35,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961047580] [2022-07-19 21:17:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:35,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:35,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961047580] [2022-07-19 21:17:35,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961047580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:17:35,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862533814] [2022-07-19 21:17:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:35,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:17:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:17:35,669 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) [2022-07-19 21:17:35,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:17:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:17:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:17:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:35,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:17:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:35,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862533814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:17:35,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:17:35,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:17:35,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597784804] [2022-07-19 21:17:35,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:17:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:17:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:17:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:17:35,841 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 219 [2022-07-19 21:17:35,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 163 transitions, 368 flow. Second operand has 10 states, 10 states have (on average 175.3) internal successors, (1753), 10 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,842 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:35,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 219 [2022-07-19 21:17:35,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:35,908 INFO L129 PetriNetUnfolder]: 2/209 cut-off events. [2022-07-19 21:17:35,908 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:17:35,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 209 events. 2/209 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 393 event pairs, 0 based on Foata normal form. 2/209 useless extension candidates. Maximal degree in co-relation 200. Up to 11 conditions per place. [2022-07-19 21:17:35,910 INFO L132 encePairwiseOnDemand]: 213/219 looper letters, 14 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-07-19 21:17:35,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 173 transitions, 436 flow [2022-07-19 21:17:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:17:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:17:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1582 transitions. [2022-07-19 21:17:35,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8026382546930492 [2022-07-19 21:17:35,913 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1582 transitions. [2022-07-19 21:17:35,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1582 transitions. [2022-07-19 21:17:35,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:35,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1582 transitions. [2022-07-19 21:17:35,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.77777777777777) internal successors, (1582), 9 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,918 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,918 INFO L186 Difference]: Start difference. First operand has 194 places, 163 transitions, 368 flow. Second operand 9 states and 1582 transitions. [2022-07-19 21:17:35,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 173 transitions, 436 flow [2022-07-19 21:17:35,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 173 transitions, 422 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:17:35,921 INFO L242 Difference]: Finished difference. Result has 183 places, 169 transitions, 404 flow [2022-07-19 21:17:35,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=404, PETRI_PLACES=183, PETRI_TRANSITIONS=169} [2022-07-19 21:17:35,922 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, -9 predicate places. [2022-07-19 21:17:35,922 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 169 transitions, 404 flow [2022-07-19 21:17:35,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.3) internal successors, (1753), 10 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:35,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:35,923 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] [2022-07-19 21:17:35,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:17:36,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:17:36,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:36,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1703694628, now seen corresponding path program 1 times [2022-07-19 21:17:36,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:36,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626285124] [2022-07-19 21:17:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:36,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 21:17:36,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:36,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626285124] [2022-07-19 21:17:36,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626285124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:17:36,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:17:36,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:17:36,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933148581] [2022-07-19 21:17:36,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:17:36,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:17:36,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:36,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:17:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:17:36,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 219 [2022-07-19 21:17:36,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 169 transitions, 404 flow. Second operand has 5 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:36,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:36,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 219 [2022-07-19 21:17:36,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:41,031 INFO L129 PetriNetUnfolder]: 16744/41746 cut-off events. [2022-07-19 21:17:41,032 INFO L130 PetriNetUnfolder]: For 475/475 co-relation queries the response was YES. [2022-07-19 21:17:41,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64936 conditions, 41746 events. 16744/41746 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 1798. Compared 506526 event pairs, 9176 based on Foata normal form. 750/41816 useless extension candidates. Maximal degree in co-relation 64810. Up to 14189 conditions per place. [2022-07-19 21:17:41,313 INFO L132 encePairwiseOnDemand]: 211/219 looper letters, 31 selfloop transitions, 5 changer transitions 53/233 dead transitions. [2022-07-19 21:17:41,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 233 transitions, 725 flow [2022-07-19 21:17:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:17:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:17:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1204 transitions. [2022-07-19 21:17:41,316 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7853881278538812 [2022-07-19 21:17:41,316 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1204 transitions. [2022-07-19 21:17:41,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1204 transitions. [2022-07-19 21:17:41,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:41,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1204 transitions. [2022-07-19 21:17:41,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,321 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,321 INFO L186 Difference]: Start difference. First operand has 183 places, 169 transitions, 404 flow. Second operand 7 states and 1204 transitions. [2022-07-19 21:17:41,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 233 transitions, 725 flow [2022-07-19 21:17:41,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 233 transitions, 719 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:17:41,325 INFO L242 Difference]: Finished difference. Result has 193 places, 173 transitions, 455 flow [2022-07-19 21:17:41,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=193, PETRI_TRANSITIONS=173} [2022-07-19 21:17:41,326 INFO L279 CegarLoopForPetriNet]: 192 programPoint places, 1 predicate places. [2022-07-19 21:17:41,327 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 173 transitions, 455 flow [2022-07-19 21:17:41,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,327 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:41,327 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, 1, 1] [2022-07-19 21:17:41,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:17:41,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash -219963599, now seen corresponding path program 1 times [2022-07-19 21:17:41,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:41,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783819419] [2022-07-19 21:17:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:41,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:17:41,345 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:17:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:17:41,369 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:17:41,369 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:17:41,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:17:41,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:17:41,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:17:41,369 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:17:41,370 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:17:41,371 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:17:41,388 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-19 21:17:41,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 217 places, 249 transitions, 558 flow [2022-07-19 21:17:41,490 INFO L129 PetriNetUnfolder]: 158/949 cut-off events. [2022-07-19 21:17:41,490 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-19 21:17:41,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 949 events. 158/949 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4167 event pairs, 23 based on Foata normal form. 0/801 useless extension candidates. Maximal degree in co-relation 653. Up to 80 conditions per place. [2022-07-19 21:17:41,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 249 transitions, 558 flow [2022-07-19 21:17:41,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 249 transitions, 558 flow [2022-07-19 21:17:41,507 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:17:41,507 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@e2341f3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e78e8bb [2022-07-19 21:17:41,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:17:41,512 INFO L129 PetriNetUnfolder]: 8/113 cut-off events. [2022-07-19 21:17:41,512 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:17:41,512 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:41,512 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] [2022-07-19 21:17:41,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:41,513 INFO L85 PathProgramCache]: Analyzing trace with hash -742480593, now seen corresponding path program 1 times [2022-07-19 21:17:41,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:41,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052262108] [2022-07-19 21:17:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:41,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:41,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:41,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052262108] [2022-07-19 21:17:41,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052262108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:17:41,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:17:41,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:17:41,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705399262] [2022-07-19 21:17:41,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:17:41,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:17:41,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:41,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:17:41,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:17:41,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 249 [2022-07-19 21:17:41,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 249 transitions, 558 flow. Second operand has 2 states, 2 states have (on average 203.5) internal successors, (407), 2 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:41,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 249 [2022-07-19 21:17:41,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:41,625 INFO L129 PetriNetUnfolder]: 72/857 cut-off events. [2022-07-19 21:17:41,625 INFO L130 PetriNetUnfolder]: For 287/303 co-relation queries the response was YES. [2022-07-19 21:17:41,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 857 events. 72/857 cut-off events. For 287/303 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4048 event pairs, 23 based on Foata normal form. 580/1375 useless extension candidates. Maximal degree in co-relation 624. Up to 86 conditions per place. [2022-07-19 21:17:41,630 INFO L132 encePairwiseOnDemand]: 214/249 looper letters, 5 selfloop transitions, 0 changer transitions 28/213 dead transitions. [2022-07-19 21:17:41,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 213 transitions, 506 flow [2022-07-19 21:17:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:17:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:17:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 451 transitions. [2022-07-19 21:17:41,631 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9056224899598394 [2022-07-19 21:17:41,631 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 451 transitions. [2022-07-19 21:17:41,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 451 transitions. [2022-07-19 21:17:41,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:41,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 451 transitions. [2022-07-19 21:17:41,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 225.5) internal successors, (451), 2 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,633 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,633 INFO L186 Difference]: Start difference. First operand has 217 places, 249 transitions, 558 flow. Second operand 2 states and 451 transitions. [2022-07-19 21:17:41,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 213 transitions, 506 flow [2022-07-19 21:17:41,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 213 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:17:41,637 INFO L242 Difference]: Finished difference. Result has 217 places, 185 transitions, 415 flow [2022-07-19 21:17:41,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=415, PETRI_PLACES=217, PETRI_TRANSITIONS=185} [2022-07-19 21:17:41,637 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 0 predicate places. [2022-07-19 21:17:41,638 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 185 transitions, 415 flow [2022-07-19 21:17:41,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 203.5) internal successors, (407), 2 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,638 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:41,638 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:17:41,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:17:41,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1035883600, now seen corresponding path program 1 times [2022-07-19 21:17:41,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:41,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338972844] [2022-07-19 21:17:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:41,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:41,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:41,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338972844] [2022-07-19 21:17:41,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338972844] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:17:41,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:17:41,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:17:41,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428760597] [2022-07-19 21:17:41,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:17:41,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:17:41,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:17:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:17:41,655 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 249 [2022-07-19 21:17:41,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 185 transitions, 415 flow. Second operand has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:41,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 249 [2022-07-19 21:17:41,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:41,692 INFO L129 PetriNetUnfolder]: 5/289 cut-off events. [2022-07-19 21:17:41,692 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:17:41,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 289 events. 5/289 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 752 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 348. Up to 30 conditions per place. [2022-07-19 21:17:41,694 INFO L132 encePairwiseOnDemand]: 246/249 looper letters, 14 selfloop transitions, 2 changer transitions 0/189 dead transitions. [2022-07-19 21:17:41,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 189 transitions, 455 flow [2022-07-19 21:17:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:17:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:17:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2022-07-19 21:17:41,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8099062918340026 [2022-07-19 21:17:41,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2022-07-19 21:17:41,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2022-07-19 21:17:41,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:41,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2022-07-19 21:17:41,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,699 INFO L186 Difference]: Start difference. First operand has 217 places, 185 transitions, 415 flow. Second operand 3 states and 605 transitions. [2022-07-19 21:17:41,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 189 transitions, 455 flow [2022-07-19 21:17:41,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 189 transitions, 435 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-19 21:17:41,701 INFO L242 Difference]: Finished difference. Result has 199 places, 186 transitions, 407 flow [2022-07-19 21:17:41,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=407, PETRI_PLACES=199, PETRI_TRANSITIONS=186} [2022-07-19 21:17:41,702 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -18 predicate places. [2022-07-19 21:17:41,702 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 186 transitions, 407 flow [2022-07-19 21:17:41,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,702 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:41,702 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] [2022-07-19 21:17:41,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:17:41,703 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash 910470370, now seen corresponding path program 1 times [2022-07-19 21:17:41,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:41,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511201580] [2022-07-19 21:17:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:41,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:41,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:41,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511201580] [2022-07-19 21:17:41,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511201580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:17:41,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676927827] [2022-07-19 21:17:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:41,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:17:41,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:17:41,730 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) [2022-07-19 21:17:41,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:17:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:41,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:17:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:17:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:41,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:17:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:17:41,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676927827] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:17:41,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:17:41,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:17:41,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900171609] [2022-07-19 21:17:41,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:17:41,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:17:41,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:41,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:17:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:17:41,885 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 249 [2022-07-19 21:17:41,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 186 transitions, 407 flow. Second operand has 10 states, 10 states have (on average 197.3) internal successors, (1973), 10 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:41,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:41,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 249 [2022-07-19 21:17:41,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:42,066 INFO L129 PetriNetUnfolder]: 3/257 cut-off events. [2022-07-19 21:17:42,079 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:17:42,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 257 events. 3/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 566 event pairs, 0 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 319. Up to 15 conditions per place. [2022-07-19 21:17:42,082 INFO L132 encePairwiseOnDemand]: 243/249 looper letters, 15 selfloop transitions, 9 changer transitions 0/196 dead transitions. [2022-07-19 21:17:42,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 196 transitions, 477 flow [2022-07-19 21:17:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:17:42,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:17:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1781 transitions. [2022-07-19 21:17:42,092 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7947344935296743 [2022-07-19 21:17:42,092 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1781 transitions. [2022-07-19 21:17:42,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1781 transitions. [2022-07-19 21:17:42,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:42,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1781 transitions. [2022-07-19 21:17:42,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.88888888888889) internal successors, (1781), 9 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:42,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 249.0) internal successors, (2490), 10 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:42,116 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 249.0) internal successors, (2490), 10 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:42,116 INFO L186 Difference]: Start difference. First operand has 199 places, 186 transitions, 407 flow. Second operand 9 states and 1781 transitions. [2022-07-19 21:17:42,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 196 transitions, 477 flow [2022-07-19 21:17:42,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 196 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:17:42,119 INFO L242 Difference]: Finished difference. Result has 209 places, 192 transitions, 455 flow [2022-07-19 21:17:42,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=455, PETRI_PLACES=209, PETRI_TRANSITIONS=192} [2022-07-19 21:17:42,120 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -8 predicate places. [2022-07-19 21:17:42,120 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 192 transitions, 455 flow [2022-07-19 21:17:42,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 197.3) internal successors, (1973), 10 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:42,121 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:42,121 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] [2022-07-19 21:17:42,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:17:42,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:17:42,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:17:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash -471698487, now seen corresponding path program 1 times [2022-07-19 21:17:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:42,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787893419] [2022-07-19 21:17:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 21:17:42,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787893419] [2022-07-19 21:17:42,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787893419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:17:42,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:17:42,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:17:42,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286255672] [2022-07-19 21:17:42,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:17:42,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:17:42,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:42,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:17:42,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:17:42,380 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 249 [2022-07-19 21:17:42,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 192 transitions, 455 flow. Second operand has 5 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:42,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:42,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 249 [2022-07-19 21:17:42,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:13,321 INFO L129 PetriNetUnfolder]: 110512/253118 cut-off events. [2022-07-19 21:18:13,321 INFO L130 PetriNetUnfolder]: For 2354/2354 co-relation queries the response was YES. [2022-07-19 21:18:15,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 396834 conditions, 253118 events. 110512/253118 cut-off events. For 2354/2354 co-relation queries the response was YES. Maximal size of possible extension queue 9200. Compared 3570403 event pairs, 63940 based on Foata normal form. 3875/253383 useless extension candidates. Maximal degree in co-relation 396822. Up to 88950 conditions per place. [2022-07-19 21:18:16,853 INFO L132 encePairwiseOnDemand]: 240/249 looper letters, 38 selfloop transitions, 6 changer transitions 65/271 dead transitions. [2022-07-19 21:18:16,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 271 transitions, 851 flow [2022-07-19 21:18:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:18:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:18:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1350 transitions. [2022-07-19 21:18:16,856 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.774526678141136 [2022-07-19 21:18:16,856 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1350 transitions. [2022-07-19 21:18:16,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1350 transitions. [2022-07-19 21:18:16,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:16,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1350 transitions. [2022-07-19 21:18:16,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 192.85714285714286) internal successors, (1350), 7 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:16,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:16,862 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:16,862 INFO L186 Difference]: Start difference. First operand has 209 places, 192 transitions, 455 flow. Second operand 7 states and 1350 transitions. [2022-07-19 21:18:16,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 271 transitions, 851 flow [2022-07-19 21:18:16,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 271 transitions, 845 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:16,867 INFO L242 Difference]: Finished difference. Result has 219 places, 197 transitions, 517 flow [2022-07-19 21:18:16,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=517, PETRI_PLACES=219, PETRI_TRANSITIONS=197} [2022-07-19 21:18:16,867 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 2 predicate places. [2022-07-19 21:18:16,867 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 197 transitions, 517 flow [2022-07-19 21:18:16,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:16,868 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:16,868 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] [2022-07-19 21:18:16,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 21:18:16,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:16,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1292883041, now seen corresponding path program 1 times [2022-07-19 21:18:16,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:16,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700923458] [2022-07-19 21:18:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:16,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:16,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:16,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700923458] [2022-07-19 21:18:16,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700923458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:16,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757238032] [2022-07-19 21:18:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:16,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:16,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:16,923 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) [2022-07-19 21:18:16,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:18:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:17,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:17,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:17,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:17,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757238032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:17,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:17,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:17,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054361346] [2022-07-19 21:18:17,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:17,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:17,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:17,139 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 249 [2022-07-19 21:18:17,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 197 transitions, 517 flow. Second operand has 18 states, 18 states have (on average 197.61111111111111) internal successors, (3557), 18 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:17,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:17,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 249 [2022-07-19 21:18:17,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:17,367 INFO L129 PetriNetUnfolder]: 49/648 cut-off events. [2022-07-19 21:18:17,367 INFO L130 PetriNetUnfolder]: For 115/311 co-relation queries the response was YES. [2022-07-19 21:18:17,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 648 events. 49/648 cut-off events. For 115/311 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3301 event pairs, 23 based on Foata normal form. 3/634 useless extension candidates. Maximal degree in co-relation 964. Up to 81 conditions per place. [2022-07-19 21:18:17,376 INFO L132 encePairwiseOnDemand]: 244/249 looper letters, 18 selfloop transitions, 16 changer transitions 0/196 dead transitions. [2022-07-19 21:18:17,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 196 transitions, 595 flow [2022-07-19 21:18:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:18:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:18:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3547 transitions. [2022-07-19 21:18:17,382 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7913877733154842 [2022-07-19 21:18:17,382 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3547 transitions. [2022-07-19 21:18:17,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3547 transitions. [2022-07-19 21:18:17,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:17,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3547 transitions. [2022-07-19 21:18:17,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 197.05555555555554) internal successors, (3547), 18 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:17,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:17,394 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:17,394 INFO L186 Difference]: Start difference. First operand has 219 places, 197 transitions, 517 flow. Second operand 18 states and 3547 transitions. [2022-07-19 21:18:17,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 196 transitions, 595 flow [2022-07-19 21:18:17,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 196 transitions, 558 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-07-19 21:18:17,398 INFO L242 Difference]: Finished difference. Result has 211 places, 187 transitions, 494 flow [2022-07-19 21:18:17,398 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=494, PETRI_PLACES=211, PETRI_TRANSITIONS=187} [2022-07-19 21:18:17,399 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -6 predicate places. [2022-07-19 21:18:17,399 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 187 transitions, 494 flow [2022-07-19 21:18:17,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 197.61111111111111) internal successors, (3557), 18 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:17,400 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:17,400 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, 1, 1] [2022-07-19 21:18:17,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:17,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:17,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:17,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:17,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1000398316, now seen corresponding path program 1 times [2022-07-19 21:18:17,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:17,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578411455] [2022-07-19 21:18:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:17,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:17,656 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:17,679 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:17,680 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:17,680 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:17,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:17,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:18:17,680 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:18:17,681 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:17,681 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 21:18:17,699 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-19 21:18:17,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 242 places, 279 transitions, 636 flow [2022-07-19 21:18:17,882 INFO L129 PetriNetUnfolder]: 284/1578 cut-off events. [2022-07-19 21:18:17,882 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-19 21:18:17,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1810 conditions, 1578 events. 284/1578 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8559 event pairs, 72 based on Foata normal form. 0/1351 useless extension candidates. Maximal degree in co-relation 1048. Up to 192 conditions per place. [2022-07-19 21:18:17,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 279 transitions, 636 flow [2022-07-19 21:18:17,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 279 transitions, 636 flow [2022-07-19 21:18:17,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:17,920 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@e2341f3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e78e8bb [2022-07-19 21:18:17,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:17,924 INFO L129 PetriNetUnfolder]: 9/110 cut-off events. [2022-07-19 21:18:17,924 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:17,924 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:17,924 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] [2022-07-19 21:18:17,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:17,925 INFO L85 PathProgramCache]: Analyzing trace with hash -522281913, now seen corresponding path program 1 times [2022-07-19 21:18:17,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:17,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308477029] [2022-07-19 21:18:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:17,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:17,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:17,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308477029] [2022-07-19 21:18:17,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308477029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:17,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:17,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:17,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590524148] [2022-07-19 21:18:17,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:17,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:17,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:17,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:17,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:17,942 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 279 [2022-07-19 21:18:17,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 279 transitions, 636 flow. Second operand has 3 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) [2022-07-19 21:18:17,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:17,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 279 [2022-07-19 21:18:17,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:18,255 INFO L129 PetriNetUnfolder]: 152/1417 cut-off events. [2022-07-19 21:18:18,256 INFO L130 PetriNetUnfolder]: For 638/737 co-relation queries the response was YES. [2022-07-19 21:18:18,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1882 conditions, 1417 events. 152/1417 cut-off events. For 638/737 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8317 event pairs, 72 based on Foata normal form. 1763/3086 useless extension candidates. Maximal degree in co-relation 1044. Up to 228 conditions per place. [2022-07-19 21:18:18,262 INFO L132 encePairwiseOnDemand]: 235/279 looper letters, 15 selfloop transitions, 2 changer transitions 29/241 dead transitions. [2022-07-19 21:18:18,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 241 transitions, 606 flow [2022-07-19 21:18:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2022-07-19 21:18:18,263 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8673835125448028 [2022-07-19 21:18:18,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2022-07-19 21:18:18,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2022-07-19 21:18:18,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:18,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2022-07-19 21:18:18,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:18,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:18,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:18,266 INFO L186 Difference]: Start difference. First operand has 242 places, 279 transitions, 636 flow. Second operand 3 states and 726 transitions. [2022-07-19 21:18:18,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 241 transitions, 606 flow [2022-07-19 21:18:18,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 241 transitions, 606 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:18,269 INFO L242 Difference]: Finished difference. Result has 244 places, 209 transitions, 488 flow [2022-07-19 21:18:18,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=488, PETRI_PLACES=244, PETRI_TRANSITIONS=209} [2022-07-19 21:18:18,270 INFO L279 CegarLoopForPetriNet]: 242 programPoint places, 2 predicate places. [2022-07-19 21:18:18,270 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 209 transitions, 488 flow [2022-07-19 21:18:18,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-07-19 21:18:18,270 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:18,270 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] [2022-07-19 21:18:18,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 21:18:18,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:18,270 INFO L85 PathProgramCache]: Analyzing trace with hash 384187445, now seen corresponding path program 1 times [2022-07-19 21:18:18,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:18,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716516412] [2022-07-19 21:18:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:18,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:18,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:18,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716516412] [2022-07-19 21:18:18,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716516412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:18,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287500847] [2022-07-19 21:18:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:18,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:18,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:18,329 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) [2022-07-19 21:18:18,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:18:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:18,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:18,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:18,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287500847] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:18,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:18,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:18,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621440761] [2022-07-19 21:18:18,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:18,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:18,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:18,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:18,452 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 279 [2022-07-19 21:18:18,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 209 transitions, 488 flow. Second operand has 10 states, 10 states have (on average 219.3) internal successors, (2193), 10 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:18,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:18,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 279 [2022-07-19 21:18:18,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:18,524 INFO L129 PetriNetUnfolder]: 4/305 cut-off events. [2022-07-19 21:18:18,525 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-07-19 21:18:18,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 305 events. 4/305 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 733 event pairs, 0 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 329. Up to 19 conditions per place. [2022-07-19 21:18:18,527 INFO L132 encePairwiseOnDemand]: 273/279 looper letters, 16 selfloop transitions, 9 changer transitions 0/219 dead transitions. [2022-07-19 21:18:18,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 219 transitions, 560 flow [2022-07-19 21:18:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1980 transitions. [2022-07-19 21:18:18,532 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7885304659498208 [2022-07-19 21:18:18,532 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1980 transitions. [2022-07-19 21:18:18,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1980 transitions. [2022-07-19 21:18:18,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:18,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1980 transitions. [2022-07-19 21:18:18,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 220.0) internal successors, (1980), 9 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:18,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 279.0) internal successors, (2790), 10 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:18,540 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 279.0) internal successors, (2790), 10 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:18,540 INFO L186 Difference]: Start difference. First operand has 244 places, 209 transitions, 488 flow. Second operand 9 states and 1980 transitions. [2022-07-19 21:18:18,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 219 transitions, 560 flow [2022-07-19 21:18:18,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 219 transitions, 528 flow, removed 15 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:18,543 INFO L242 Difference]: Finished difference. Result has 233 places, 215 transitions, 506 flow [2022-07-19 21:18:18,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=506, PETRI_PLACES=233, PETRI_TRANSITIONS=215} [2022-07-19 21:18:18,544 INFO L279 CegarLoopForPetriNet]: 242 programPoint places, -9 predicate places. [2022-07-19 21:18:18,544 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 215 transitions, 506 flow [2022-07-19 21:18:18,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 219.3) internal successors, (2193), 10 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:18,545 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:18,545 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] [2022-07-19 21:18:18,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:18,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:18,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1884532844, now seen corresponding path program 1 times [2022-07-19 21:18:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:18,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365190043] [2022-07-19 21:18:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 21:18:18,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:18,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365190043] [2022-07-19 21:18:18,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365190043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:18,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:18,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:18:18,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733515683] [2022-07-19 21:18:18,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:18,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:18:18,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:18:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:18:18,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 279 [2022-07-19 21:18:18,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 215 transitions, 506 flow. Second operand has 5 states, 5 states have (on average 196.6) internal successors, (983), 5 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:18,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:18,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 279 [2022-07-19 21:18:18,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand