./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_21-deref_read_racing.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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:16:18,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:16:18,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:16:18,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:16:18,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:16:18,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:16:18,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:16:18,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:16:18,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:16:18,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:16:18,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:16:18,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:16:18,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:16:18,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:16:18,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:16:18,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:16:18,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:16:18,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:16:18,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:16:18,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:16:18,483 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:16:18,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:16:18,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:16:18,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:16:18,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:16:18,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:16:18,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:16:18,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:16:18,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:16:18,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:16:18,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:16:18,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:16:18,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:16:18,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:16:18,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:16:18,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:16:18,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:16:18,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:16:18,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:16:18,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:16:18,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:16:18,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:16:18,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:16:18,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:16:18,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:16:18,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:16:18,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:16:18,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:16:18,550 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:16:18,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:16:18,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:16:18,551 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:16:18,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:16:18,552 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:16:18,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:16:18,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:16:18,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:16:18,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:16:18,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:16:18,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:16:18,553 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:16:18,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:16:18,553 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:16:18,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:16:18,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:16:18,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:16:18,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:16:18,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:16:18,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:16:18,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:16:18,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:16:18,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:16:18,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:16:18,562 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:16:18,562 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:16:18,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:16:18,562 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2022-07-12 10:16:18,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:16:18,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:16:18,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:16:18,784 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:16:18,785 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:16:18,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-07-12 10:16:18,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1701cec50/290775dcbf1d48f7aa3b947bd3cb5151/FLAGe82e7785f [2022-07-12 10:16:19,369 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:16:19,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-07-12 10:16:19,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1701cec50/290775dcbf1d48f7aa3b947bd3cb5151/FLAGe82e7785f [2022-07-12 10:16:19,647 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1701cec50/290775dcbf1d48f7aa3b947bd3cb5151 [2022-07-12 10:16:19,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:16:19,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:16:19,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:16:19,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:16:19,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:16:19,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:16:19" (1/1) ... [2022-07-12 10:16:19,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b70669b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:19, skipping insertion in model container [2022-07-12 10:16:19,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:16:19" (1/1) ... [2022-07-12 10:16:19,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:16:19,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:16:19,963 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_21-deref_read_racing.i[30176,30189] [2022-07-12 10:16:19,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:16:20,012 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:16:20,053 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_21-deref_read_racing.i[30176,30189] [2022-07-12 10:16:20,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:16:20,089 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:16:20,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20 WrapperNode [2022-07-12 10:16:20,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:16:20,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:16:20,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:16:20,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:16:20,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (1/1) ... [2022-07-12 10:16:20,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (1/1) ... [2022-07-12 10:16:20,128 INFO L137 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-12 10:16:20,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:16:20,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:16:20,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:16:20,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:16:20,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (1/1) ... [2022-07-12 10:16:20,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (1/1) ... [2022-07-12 10:16:20,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (1/1) ... [2022-07-12 10:16:20,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (1/1) ... [2022-07-12 10:16:20,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (1/1) ... [2022-07-12 10:16:20,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (1/1) ... [2022-07-12 10:16:20,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (1/1) ... [2022-07-12 10:16:20,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:16:20,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:16:20,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:16:20,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:16:20,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (1/1) ... [2022-07-12 10:16:20,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:16:20,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:20,187 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) [2022-07-12 10:16:20,194 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 [2022-07-12 10:16:20,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:16:20,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:16:20,222 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:16:20,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:16:20,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:16:20,222 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:16:20,223 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:16:20,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:16:20,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:16:20,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:16:20,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:16:20,224 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:16:20,309 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:16:20,311 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:16:20,455 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:16:20,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:16:20,462 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-12 10:16:20,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:16:20 BoogieIcfgContainer [2022-07-12 10:16:20,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:16:20,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:16:20,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:16:20,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:16:20,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:16:19" (1/3) ... [2022-07-12 10:16:20,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aff263f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:16:20, skipping insertion in model container [2022-07-12 10:16:20,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:20" (2/3) ... [2022-07-12 10:16:20,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aff263f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:16:20, skipping insertion in model container [2022-07-12 10:16:20,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:16:20" (3/3) ... [2022-07-12 10:16:20,470 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2022-07-12 10:16:20,474 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:16:20,481 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:16:20,481 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:16:20,482 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:16:20,537 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:20,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 211 flow [2022-07-12 10:16:20,650 INFO L129 PetriNetUnfolder]: 14/134 cut-off events. [2022-07-12 10:16:20,650 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:20,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 291 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-07-12 10:16:20,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 103 transitions, 211 flow [2022-07-12 10:16:20,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 103 transitions, 211 flow [2022-07-12 10:16:20,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:20,673 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:20,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:20,689 INFO L129 PetriNetUnfolder]: 4/77 cut-off events. [2022-07-12 10:16:20,690 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:20,690 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:20,691 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] [2022-07-12 10:16:20,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:20,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1011992479, now seen corresponding path program 1 times [2022-07-12 10:16:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697386466] [2022-07-12 10:16:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:20,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:20,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:20,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697386466] [2022-07-12 10:16:20,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697386466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:20,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:20,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:20,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028275720] [2022-07-12 10:16:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:20,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:20,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:20,967 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 103 [2022-07-12 10:16:20,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 211 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:20,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:20,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 103 [2022-07-12 10:16:20,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:21,003 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2022-07-12 10:16:21,004 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:16:21,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 118 events. 0/118 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 170 event pairs, 0 based on Foata normal form. 14/128 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-07-12 10:16:21,005 INFO L132 encePairwiseOnDemand]: 93/103 looper letters, 1 selfloop transitions, 0 changer transitions 11/92 dead transitions. [2022-07-12 10:16:21,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 191 flow [2022-07-12 10:16:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:21,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2022-07-12 10:16:21,023 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9368932038834952 [2022-07-12 10:16:21,025 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2022-07-12 10:16:21,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2022-07-12 10:16:21,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:21,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2022-07-12 10:16:21,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,050 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,052 INFO L186 Difference]: Start difference. First operand has 96 places, 103 transitions, 211 flow. Second operand 2 states and 193 transitions. [2022-07-12 10:16:21,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 191 flow [2022-07-12 10:16:21,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:21,059 INFO L242 Difference]: Finished difference. Result has 96 places, 81 transitions, 167 flow [2022-07-12 10:16:21,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=167, PETRI_PLACES=96, PETRI_TRANSITIONS=81} [2022-07-12 10:16:21,068 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 0 predicate places. [2022-07-12 10:16:21,071 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 167 flow [2022-07-12 10:16:21,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,072 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:21,072 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] [2022-07-12 10:16:21,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:16:21,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:21,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1486023458, now seen corresponding path program 1 times [2022-07-12 10:16:21,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:21,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731350481] [2022-07-12 10:16:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:21,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:21,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:21,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731350481] [2022-07-12 10:16:21,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731350481] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:21,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:21,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:21,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849542503] [2022-07-12 10:16:21,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:21,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:21,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:21,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:21,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:21,186 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 103 [2022-07-12 10:16:21,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 81 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:21,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 103 [2022-07-12 10:16:21,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:21,217 INFO L129 PetriNetUnfolder]: 0/85 cut-off events. [2022-07-12 10:16:21,217 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:21,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 85 events. 0/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:16:21,218 INFO L132 encePairwiseOnDemand]: 100/103 looper letters, 8 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-07-12 10:16:21,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 191 flow [2022-07-12 10:16:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2022-07-12 10:16:21,222 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8511326860841424 [2022-07-12 10:16:21,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2022-07-12 10:16:21,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2022-07-12 10:16:21,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:21,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2022-07-12 10:16:21,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,227 INFO L186 Difference]: Start difference. First operand has 96 places, 81 transitions, 167 flow. Second operand 3 states and 263 transitions. [2022-07-12 10:16:21,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 191 flow [2022-07-12 10:16:21,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:21,230 INFO L242 Difference]: Finished difference. Result has 88 places, 81 transitions, 175 flow [2022-07-12 10:16:21,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2022-07-12 10:16:21,232 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2022-07-12 10:16:21,232 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 175 flow [2022-07-12 10:16:21,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,232 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:21,233 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] [2022-07-12 10:16:21,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:16:21,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash 455753518, now seen corresponding path program 1 times [2022-07-12 10:16:21,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:21,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042801272] [2022-07-12 10:16:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:21,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:21,265 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:21,322 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:21,325 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:21,326 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:21,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:21,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:16:21,329 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:16:21,335 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:21,336 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:16:21,366 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:21,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 284 flow [2022-07-12 10:16:21,430 INFO L129 PetriNetUnfolder]: 24/203 cut-off events. [2022-07-12 10:16:21,430 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:16:21,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 550 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2022-07-12 10:16:21,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 136 transitions, 284 flow [2022-07-12 10:16:21,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 136 transitions, 284 flow [2022-07-12 10:16:21,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:21,451 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:21,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:21,466 INFO L129 PetriNetUnfolder]: 5/81 cut-off events. [2022-07-12 10:16:21,466 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:21,467 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:21,467 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] [2022-07-12 10:16:21,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:21,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:21,468 INFO L85 PathProgramCache]: Analyzing trace with hash -497376990, now seen corresponding path program 1 times [2022-07-12 10:16:21,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:21,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787804470] [2022-07-12 10:16:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:21,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:21,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787804470] [2022-07-12 10:16:21,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787804470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:21,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:21,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:21,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298447908] [2022-07-12 10:16:21,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:21,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:21,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:21,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:21,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:21,512 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 136 [2022-07-12 10:16:21,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 136 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:21,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 136 [2022-07-12 10:16:21,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:21,553 INFO L129 PetriNetUnfolder]: 0/154 cut-off events. [2022-07-12 10:16:21,556 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:16:21,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 154 events. 0/154 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 0 based on Foata normal form. 59/209 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-12 10:16:21,559 INFO L132 encePairwiseOnDemand]: 117/136 looper letters, 11 selfloop transitions, 2 changer transitions 11/123 dead transitions. [2022-07-12 10:16:21,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 123 transitions, 284 flow [2022-07-12 10:16:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2022-07-12 10:16:21,565 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8995098039215687 [2022-07-12 10:16:21,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2022-07-12 10:16:21,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2022-07-12 10:16:21,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:21,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2022-07-12 10:16:21,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,572 INFO L186 Difference]: Start difference. First operand has 125 places, 136 transitions, 284 flow. Second operand 3 states and 367 transitions. [2022-07-12 10:16:21,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 123 transitions, 284 flow [2022-07-12 10:16:21,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 123 transitions, 282 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:21,580 INFO L242 Difference]: Finished difference. Result has 127 places, 109 transitions, 238 flow [2022-07-12 10:16:21,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=127, PETRI_TRANSITIONS=109} [2022-07-12 10:16:21,583 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 2 predicate places. [2022-07-12 10:16:21,583 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 238 flow [2022-07-12 10:16:21,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,584 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:21,584 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] [2022-07-12 10:16:21,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:16:21,585 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1229485238, now seen corresponding path program 1 times [2022-07-12 10:16:21,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:21,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372862785] [2022-07-12 10:16:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:21,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:21,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:21,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372862785] [2022-07-12 10:16:21,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372862785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185273352] [2022-07-12 10:16:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:21,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:21,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:21,654 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) [2022-07-12 10:16:21,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:16:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:21,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:21,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:21,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185273352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:21,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:21,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:21,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447959679] [2022-07-12 10:16:21,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:21,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:21,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:21,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:21,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:21,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 136 [2022-07-12 10:16:21,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 109 transitions, 238 flow. Second operand has 10 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:21,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 136 [2022-07-12 10:16:21,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:21,946 INFO L129 PetriNetUnfolder]: 0/110 cut-off events. [2022-07-12 10:16:21,946 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:16:21,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-12 10:16:21,947 INFO L132 encePairwiseOnDemand]: 131/136 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-07-12 10:16:21,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 104 transitions, 258 flow [2022-07-12 10:16:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 999 transitions. [2022-07-12 10:16:21,951 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8161764705882353 [2022-07-12 10:16:21,951 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 999 transitions. [2022-07-12 10:16:21,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 999 transitions. [2022-07-12 10:16:21,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:21,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 999 transitions. [2022-07-12 10:16:21,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.0) internal successors, (999), 9 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,959 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,959 INFO L186 Difference]: Start difference. First operand has 127 places, 109 transitions, 238 flow. Second operand 9 states and 999 transitions. [2022-07-12 10:16:21,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 104 transitions, 258 flow [2022-07-12 10:16:21,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:21,963 INFO L242 Difference]: Finished difference. Result has 112 places, 100 transitions, 230 flow [2022-07-12 10:16:21,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=112, PETRI_TRANSITIONS=100} [2022-07-12 10:16:21,965 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, -13 predicate places. [2022-07-12 10:16:21,965 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 230 flow [2022-07-12 10:16:21,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:21,966 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:21,966 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] [2022-07-12 10:16:21,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:22,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:22,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:22,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:22,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1842596803, now seen corresponding path program 1 times [2022-07-12 10:16:22,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:22,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77694674] [2022-07-12 10:16:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:22,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:22,210 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:22,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:22,233 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:22,233 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:22,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:22,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:16:22,234 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:16:22,235 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:22,235 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:16:22,253 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:22,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 359 flow [2022-07-12 10:16:22,281 INFO L129 PetriNetUnfolder]: 34/272 cut-off events. [2022-07-12 10:16:22,281 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:16:22,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 802 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2022-07-12 10:16:22,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 169 transitions, 359 flow [2022-07-12 10:16:22,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 169 transitions, 359 flow [2022-07-12 10:16:22,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:22,296 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:22,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:22,306 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-12 10:16:22,306 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:22,307 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:22,307 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] [2022-07-12 10:16:22,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:22,308 INFO L85 PathProgramCache]: Analyzing trace with hash -56624670, now seen corresponding path program 1 times [2022-07-12 10:16:22,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:22,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170132807] [2022-07-12 10:16:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:22,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:22,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170132807] [2022-07-12 10:16:22,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170132807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:22,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:22,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:22,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917462180] [2022-07-12 10:16:22,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:22,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:22,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:22,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:22,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:22,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 169 [2022-07-12 10:16:22,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 169 transitions, 359 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:22,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:22,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 169 [2022-07-12 10:16:22,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:22,425 INFO L129 PetriNetUnfolder]: 0/212 cut-off events. [2022-07-12 10:16:22,425 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:16:22,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 212 events. 0/212 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 553 event pairs, 0 based on Foata normal form. 129/335 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-12 10:16:22,426 INFO L132 encePairwiseOnDemand]: 144/169 looper letters, 12 selfloop transitions, 2 changer transitions 11/150 dead transitions. [2022-07-12 10:16:22,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 150 transitions, 349 flow [2022-07-12 10:16:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2022-07-12 10:16:22,428 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8915187376725838 [2022-07-12 10:16:22,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2022-07-12 10:16:22,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2022-07-12 10:16:22,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:22,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2022-07-12 10:16:22,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:22,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:22,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:22,445 INFO L186 Difference]: Start difference. First operand has 154 places, 169 transitions, 359 flow. Second operand 3 states and 452 transitions. [2022-07-12 10:16:22,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 150 transitions, 349 flow [2022-07-12 10:16:22,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 150 transitions, 343 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:22,450 INFO L242 Difference]: Finished difference. Result has 156 places, 136 transitions, 297 flow [2022-07-12 10:16:22,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=156, PETRI_TRANSITIONS=136} [2022-07-12 10:16:22,454 INFO L279 CegarLoopForPetriNet]: 154 programPoint places, 2 predicate places. [2022-07-12 10:16:22,454 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 136 transitions, 297 flow [2022-07-12 10:16:22,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:22,456 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:22,457 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] [2022-07-12 10:16:22,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:16:22,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:22,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:22,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1053701942, now seen corresponding path program 1 times [2022-07-12 10:16:22,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:22,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85522991] [2022-07-12 10:16:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:22,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:22,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:22,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85522991] [2022-07-12 10:16:22,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85522991] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:22,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007381514] [2022-07-12 10:16:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:22,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:22,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:22,514 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) [2022-07-12 10:16:22,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:16:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:22,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:22,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007381514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:22,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:22,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:22,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016999037] [2022-07-12 10:16:22,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:22,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:22,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:22,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:22,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:22,726 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 169 [2022-07-12 10:16:22,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 136 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 137.3) internal successors, (1373), 10 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:22,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:22,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 169 [2022-07-12 10:16:22,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:22,829 INFO L129 PetriNetUnfolder]: 0/157 cut-off events. [2022-07-12 10:16:22,830 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:16:22,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 157 events. 0/157 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 242 event pairs, 0 based on Foata normal form. 2/159 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-12 10:16:22,830 INFO L132 encePairwiseOnDemand]: 163/169 looper letters, 13 selfloop transitions, 9 changer transitions 0/146 dead transitions. [2022-07-12 10:16:22,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 146 transitions, 363 flow [2022-07-12 10:16:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1239 transitions. [2022-07-12 10:16:22,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.814595660749507 [2022-07-12 10:16:22,834 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1239 transitions. [2022-07-12 10:16:22,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1239 transitions. [2022-07-12 10:16:22,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:22,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1239 transitions. [2022-07-12 10:16:22,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 137.66666666666666) internal successors, (1239), 9 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:22,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:22,841 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:22,841 INFO L186 Difference]: Start difference. First operand has 156 places, 136 transitions, 297 flow. Second operand 9 states and 1239 transitions. [2022-07-12 10:16:22,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 146 transitions, 363 flow [2022-07-12 10:16:22,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 146 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:22,844 INFO L242 Difference]: Finished difference. Result has 155 places, 142 transitions, 345 flow [2022-07-12 10:16:22,845 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=345, PETRI_PLACES=155, PETRI_TRANSITIONS=142} [2022-07-12 10:16:22,845 INFO L279 CegarLoopForPetriNet]: 154 programPoint places, 1 predicate places. [2022-07-12 10:16:22,846 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 142 transitions, 345 flow [2022-07-12 10:16:22,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.3) internal successors, (1373), 10 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:22,847 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:22,847 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] [2022-07-12 10:16:22,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:23,060 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,SelfDestructingSolverStorable7 [2022-07-12 10:16:23,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1441395879, now seen corresponding path program 1 times [2022-07-12 10:16:23,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:23,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866745789] [2022-07-12 10:16:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:23,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:23,082 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:23,121 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:23,121 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:23,121 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:23,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:23,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:16:23,122 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:16:23,123 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:23,123 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:16:23,145 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:23,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 436 flow [2022-07-12 10:16:23,198 INFO L129 PetriNetUnfolder]: 44/341 cut-off events. [2022-07-12 10:16:23,198 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:16:23,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 341 events. 44/341 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1074 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2022-07-12 10:16:23,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 202 transitions, 436 flow [2022-07-12 10:16:23,205 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 202 transitions, 436 flow [2022-07-12 10:16:23,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:23,206 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:23,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:23,211 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-12 10:16:23,211 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:23,211 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:23,211 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] [2022-07-12 10:16:23,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:23,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:23,212 INFO L85 PathProgramCache]: Analyzing trace with hash 310264481, now seen corresponding path program 1 times [2022-07-12 10:16:23,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:23,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608849049] [2022-07-12 10:16:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:23,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:23,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:23,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608849049] [2022-07-12 10:16:23,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608849049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:23,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:23,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:23,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168288135] [2022-07-12 10:16:23,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:23,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:23,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:23,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:23,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:23,237 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 202 [2022-07-12 10:16:23,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 202 transitions, 436 flow. Second operand has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:23,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 202 [2022-07-12 10:16:23,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:23,284 INFO L129 PetriNetUnfolder]: 0/292 cut-off events. [2022-07-12 10:16:23,284 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-12 10:16:23,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 292 events. 0/292 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 909 event pairs, 0 based on Foata normal form. 64/346 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2022-07-12 10:16:23,285 INFO L132 encePairwiseOnDemand]: 174/202 looper letters, 4 selfloop transitions, 0 changer transitions 11/173 dead transitions. [2022-07-12 10:16:23,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 386 flow [2022-07-12 10:16:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 370 transitions. [2022-07-12 10:16:23,287 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9158415841584159 [2022-07-12 10:16:23,287 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 370 transitions. [2022-07-12 10:16:23,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 370 transitions. [2022-07-12 10:16:23,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:23,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 370 transitions. [2022-07-12 10:16:23,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,289 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,289 INFO L186 Difference]: Start difference. First operand has 183 places, 202 transitions, 436 flow. Second operand 2 states and 370 transitions. [2022-07-12 10:16:23,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 386 flow [2022-07-12 10:16:23,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 173 transitions, 374 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:23,292 INFO L242 Difference]: Finished difference. Result has 183 places, 162 transitions, 344 flow [2022-07-12 10:16:23,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=183, PETRI_TRANSITIONS=162} [2022-07-12 10:16:23,293 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, 0 predicate places. [2022-07-12 10:16:23,293 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 162 transitions, 344 flow [2022-07-12 10:16:23,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,294 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:23,294 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] [2022-07-12 10:16:23,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:16:23,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:23,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1486686878, now seen corresponding path program 1 times [2022-07-12 10:16:23,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:23,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463015084] [2022-07-12 10:16:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:23,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:23,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:23,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463015084] [2022-07-12 10:16:23,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463015084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:23,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:23,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:23,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227256639] [2022-07-12 10:16:23,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:23,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:23,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:23,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:23,320 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 202 [2022-07-12 10:16:23,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 162 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:23,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 202 [2022-07-12 10:16:23,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:23,381 INFO L129 PetriNetUnfolder]: 0/226 cut-off events. [2022-07-12 10:16:23,381 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:16:23,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 226 events. 0/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 541 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-12 10:16:23,382 INFO L132 encePairwiseOnDemand]: 199/202 looper letters, 13 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2022-07-12 10:16:23,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 166 transitions, 382 flow [2022-07-12 10:16:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-07-12 10:16:23,384 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8283828382838284 [2022-07-12 10:16:23,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-07-12 10:16:23,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-07-12 10:16:23,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:23,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-07-12 10:16:23,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,387 INFO L186 Difference]: Start difference. First operand has 183 places, 162 transitions, 344 flow. Second operand 3 states and 502 transitions. [2022-07-12 10:16:23,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 166 transitions, 382 flow [2022-07-12 10:16:23,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 166 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:23,390 INFO L242 Difference]: Finished difference. Result has 175 places, 163 transitions, 356 flow [2022-07-12 10:16:23,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=175, PETRI_TRANSITIONS=163} [2022-07-12 10:16:23,391 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, -8 predicate places. [2022-07-12 10:16:23,391 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 163 transitions, 356 flow [2022-07-12 10:16:23,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:23,392 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] [2022-07-12 10:16:23,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:16:23,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2070147350, now seen corresponding path program 1 times [2022-07-12 10:16:23,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:23,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098505195] [2022-07-12 10:16:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:23,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:23,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:23,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098505195] [2022-07-12 10:16:23,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098505195] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:23,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875834503] [2022-07-12 10:16:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:23,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:23,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:23,430 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) [2022-07-12 10:16:23,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:16:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:23,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:23,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875834503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:23,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:23,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:23,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272157985] [2022-07-12 10:16:23,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:23,648 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-07-12 10:16:23,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 163 transitions, 356 flow. Second operand has 10 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:23,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-07-12 10:16:23,650 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:23,750 INFO L129 PetriNetUnfolder]: 0/204 cut-off events. [2022-07-12 10:16:23,750 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:16:23,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 204 events. 0/204 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 412 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-12 10:16:23,751 INFO L132 encePairwiseOnDemand]: 196/202 looper letters, 14 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-07-12 10:16:23,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 424 flow [2022-07-12 10:16:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:23,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1474 transitions. [2022-07-12 10:16:23,754 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8107810781078107 [2022-07-12 10:16:23,754 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1474 transitions. [2022-07-12 10:16:23,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1474 transitions. [2022-07-12 10:16:23,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:23,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1474 transitions. [2022-07-12 10:16:23,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.77777777777777) internal successors, (1474), 9 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,762 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,762 INFO L186 Difference]: Start difference. First operand has 175 places, 163 transitions, 356 flow. Second operand 9 states and 1474 transitions. [2022-07-12 10:16:23,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 424 flow [2022-07-12 10:16:23,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 173 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:23,766 INFO L242 Difference]: Finished difference. Result has 185 places, 169 transitions, 404 flow [2022-07-12 10:16:23,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=174, 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=185, PETRI_TRANSITIONS=169} [2022-07-12 10:16:23,767 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, 2 predicate places. [2022-07-12 10:16:23,767 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 169 transitions, 404 flow [2022-07-12 10:16:23,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:23,768 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:23,768 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] [2022-07-12 10:16:23,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:23,981 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 [2022-07-12 10:16:23,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1101282751, now seen corresponding path program 1 times [2022-07-12 10:16:23,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:23,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294121768] [2022-07-12 10:16:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:23,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:24,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:24,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294121768] [2022-07-12 10:16:24,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294121768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207683130] [2022-07-12 10:16:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:24,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:24,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:24,060 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) [2022-07-12 10:16:24,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:16:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:24,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:24,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:24,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207683130] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:24,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:24,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:24,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137648309] [2022-07-12 10:16:24,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:24,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:24,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:24,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-07-12 10:16:24,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 169 transitions, 404 flow. Second operand has 18 states, 18 states have (on average 163.61111111111111) internal successors, (2945), 18 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:24,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:24,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-07-12 10:16:24,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:24,491 INFO L129 PetriNetUnfolder]: 0/182 cut-off events. [2022-07-12 10:16:24,491 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-12 10:16:24,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 182 events. 0/182 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:16:24,492 INFO L132 encePairwiseOnDemand]: 197/202 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-07-12 10:16:24,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 470 flow [2022-07-12 10:16:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 10:16:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-12 10:16:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2445 transitions. [2022-07-12 10:16:24,498 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.806930693069307 [2022-07-12 10:16:24,498 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2445 transitions. [2022-07-12 10:16:24,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2445 transitions. [2022-07-12 10:16:24,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:24,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2445 transitions. [2022-07-12 10:16:24,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:24,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:24,510 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:24,510 INFO L186 Difference]: Start difference. First operand has 185 places, 169 transitions, 404 flow. Second operand 15 states and 2445 transitions. [2022-07-12 10:16:24,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 470 flow [2022-07-12 10:16:24,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-12 10:16:24,514 INFO L242 Difference]: Finished difference. Result has 184 places, 161 transitions, 402 flow [2022-07-12 10:16:24,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=402, PETRI_PLACES=184, PETRI_TRANSITIONS=161} [2022-07-12 10:16:24,515 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, 1 predicate places. [2022-07-12 10:16:24,515 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 402 flow [2022-07-12 10:16:24,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.61111111111111) internal successors, (2945), 18 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:24,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:24,517 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] [2022-07-12 10:16:24,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:24,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:24,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:24,741 INFO L85 PathProgramCache]: Analyzing trace with hash -909920624, now seen corresponding path program 1 times [2022-07-12 10:16:24,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:24,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406612358] [2022-07-12 10:16:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:24,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:24,765 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:24,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:24,805 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:24,805 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:24,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:24,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:16:24,806 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:24,806 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:24,806 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:16:24,826 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:24,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 212 places, 235 transitions, 515 flow [2022-07-12 10:16:24,886 INFO L129 PetriNetUnfolder]: 54/410 cut-off events. [2022-07-12 10:16:24,887 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:16:24,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 410 events. 54/410 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1315 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 354. Up to 12 conditions per place. [2022-07-12 10:16:24,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 235 transitions, 515 flow [2022-07-12 10:16:24,894 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 235 transitions, 515 flow [2022-07-12 10:16:24,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:24,896 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:24,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:24,900 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-12 10:16:24,900 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:24,900 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:24,900 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] [2022-07-12 10:16:24,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:24,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:24,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1304355041, now seen corresponding path program 1 times [2022-07-12 10:16:24,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:24,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653218466] [2022-07-12 10:16:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:24,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:24,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:24,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653218466] [2022-07-12 10:16:24,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653218466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:24,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:24,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060637566] [2022-07-12 10:16:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:24,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:24,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:24,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 235 [2022-07-12 10:16:24,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 515 flow. Second operand has 2 states, 2 states have (on average 195.5) internal successors, (391), 2 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:24,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:24,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 235 [2022-07-12 10:16:24,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:24,968 INFO L129 PetriNetUnfolder]: 0/350 cut-off events. [2022-07-12 10:16:24,968 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-07-12 10:16:24,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 350 events. 0/350 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1153 event pairs, 0 based on Foata normal form. 92/430 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:16:24,969 INFO L132 encePairwiseOnDemand]: 201/235 looper letters, 5 selfloop transitions, 0 changer transitions 11/200 dead transitions. [2022-07-12 10:16:24,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 200 transitions, 455 flow [2022-07-12 10:16:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 429 transitions. [2022-07-12 10:16:24,971 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9127659574468086 [2022-07-12 10:16:24,971 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 429 transitions. [2022-07-12 10:16:24,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 429 transitions. [2022-07-12 10:16:24,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:24,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 429 transitions. [2022-07-12 10:16:24,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 214.5) internal successors, (429), 2 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:24,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:24,973 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:24,973 INFO L186 Difference]: Start difference. First operand has 212 places, 235 transitions, 515 flow. Second operand 2 states and 429 transitions. [2022-07-12 10:16:24,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 200 transitions, 455 flow [2022-07-12 10:16:24,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 200 transitions, 435 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:24,977 INFO L242 Difference]: Finished difference. Result has 212 places, 189 transitions, 403 flow [2022-07-12 10:16:24,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=403, PETRI_PLACES=212, PETRI_TRANSITIONS=189} [2022-07-12 10:16:24,978 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, 0 predicate places. [2022-07-12 10:16:24,978 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 189 transitions, 403 flow [2022-07-12 10:16:24,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 195.5) internal successors, (391), 2 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:24,979 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:24,979 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] [2022-07-12 10:16:24,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:16:24,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:24,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:24,979 INFO L85 PathProgramCache]: Analyzing trace with hash -492596318, now seen corresponding path program 1 times [2022-07-12 10:16:24,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:24,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473912420] [2022-07-12 10:16:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:24,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:24,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:24,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473912420] [2022-07-12 10:16:24,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473912420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:24,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:24,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:24,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573173809] [2022-07-12 10:16:24,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:24,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:24,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:24,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:24,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:24,999 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 235 [2022-07-12 10:16:25,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 189 transitions, 403 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:25,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 235 [2022-07-12 10:16:25,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:25,053 INFO L129 PetriNetUnfolder]: 0/273 cut-off events. [2022-07-12 10:16:25,054 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:16:25,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 273 events. 0/273 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 713 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-12 10:16:25,055 INFO L132 encePairwiseOnDemand]: 232/235 looper letters, 14 selfloop transitions, 2 changer transitions 0/193 dead transitions. [2022-07-12 10:16:25,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 193 transitions, 443 flow [2022-07-12 10:16:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-07-12 10:16:25,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8241134751773049 [2022-07-12 10:16:25,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-07-12 10:16:25,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-07-12 10:16:25,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:25,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-07-12 10:16:25,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,060 INFO L186 Difference]: Start difference. First operand has 212 places, 189 transitions, 403 flow. Second operand 3 states and 581 transitions. [2022-07-12 10:16:25,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 193 transitions, 443 flow [2022-07-12 10:16:25,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 193 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:25,064 INFO L242 Difference]: Finished difference. Result has 204 places, 190 transitions, 415 flow [2022-07-12 10:16:25,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=201, 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=415, PETRI_PLACES=204, PETRI_TRANSITIONS=190} [2022-07-12 10:16:25,065 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, -8 predicate places. [2022-07-12 10:16:25,065 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 190 transitions, 415 flow [2022-07-12 10:16:25,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,065 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:25,065 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] [2022-07-12 10:16:25,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:16:25,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:25,066 INFO L85 PathProgramCache]: Analyzing trace with hash -16145834, now seen corresponding path program 1 times [2022-07-12 10:16:25,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:25,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157109654] [2022-07-12 10:16:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:25,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:25,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:25,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157109654] [2022-07-12 10:16:25,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157109654] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:25,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46421510] [2022-07-12 10:16:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:25,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:25,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:25,108 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) [2022-07-12 10:16:25,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:16:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:25,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:25,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:25,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:25,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46421510] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:25,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:25,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:25,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521740854] [2022-07-12 10:16:25,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:25,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:25,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:25,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:25,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:25,269 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-07-12 10:16:25,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 190 transitions, 415 flow. Second operand has 10 states, 10 states have (on average 189.3) internal successors, (1893), 10 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:25,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-07-12 10:16:25,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:25,371 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2022-07-12 10:16:25,372 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:16:25,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 251 events. 0/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 582 event pairs, 0 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:16:25,373 INFO L132 encePairwiseOnDemand]: 229/235 looper letters, 15 selfloop transitions, 9 changer transitions 0/200 dead transitions. [2022-07-12 10:16:25,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 200 transitions, 485 flow [2022-07-12 10:16:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1709 transitions. [2022-07-12 10:16:25,377 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8080378250591016 [2022-07-12 10:16:25,378 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1709 transitions. [2022-07-12 10:16:25,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1709 transitions. [2022-07-12 10:16:25,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:25,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1709 transitions. [2022-07-12 10:16:25,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 189.88888888888889) internal successors, (1709), 9 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,387 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,387 INFO L186 Difference]: Start difference. First operand has 204 places, 190 transitions, 415 flow. Second operand 9 states and 1709 transitions. [2022-07-12 10:16:25,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 200 transitions, 485 flow [2022-07-12 10:16:25,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 200 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:25,392 INFO L242 Difference]: Finished difference. Result has 214 places, 196 transitions, 463 flow [2022-07-12 10:16:25,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=463, PETRI_PLACES=214, PETRI_TRANSITIONS=196} [2022-07-12 10:16:25,393 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, 2 predicate places. [2022-07-12 10:16:25,393 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 196 transitions, 463 flow [2022-07-12 10:16:25,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.3) internal successors, (1893), 10 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,406 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:25,406 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] [2022-07-12 10:16:25,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:25,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:16:25,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:25,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2021107327, now seen corresponding path program 1 times [2022-07-12 10:16:25,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:25,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069401761] [2022-07-12 10:16:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:25,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:25,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069401761] [2022-07-12 10:16:25,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069401761] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:25,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10135897] [2022-07-12 10:16:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:25,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:25,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:25,696 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) [2022-07-12 10:16:25,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:16:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:25,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:25,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:25,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:25,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10135897] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:25,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:25,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:25,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544868268] [2022-07-12 10:16:25,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:25,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:25,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:25,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:25,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:25,963 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-07-12 10:16:25,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 196 transitions, 463 flow. Second operand has 18 states, 18 states have (on average 189.61111111111111) internal successors, (3413), 18 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:25,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:25,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-07-12 10:16:25,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:26,132 INFO L129 PetriNetUnfolder]: 0/218 cut-off events. [2022-07-12 10:16:26,133 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-12 10:16:26,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 218 events. 0/218 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-12 10:16:26,134 INFO L132 encePairwiseOnDemand]: 230/235 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-07-12 10:16:26,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 200 transitions, 565 flow [2022-07-12 10:16:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:16:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:16:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3403 transitions. [2022-07-12 10:16:26,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8044917257683215 [2022-07-12 10:16:26,142 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3403 transitions. [2022-07-12 10:16:26,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3403 transitions. [2022-07-12 10:16:26,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:26,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3403 transitions. [2022-07-12 10:16:26,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.05555555555554) internal successors, (3403), 18 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,158 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,158 INFO L186 Difference]: Start difference. First operand has 214 places, 196 transitions, 463 flow. Second operand 18 states and 3403 transitions. [2022-07-12 10:16:26,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 200 transitions, 565 flow [2022-07-12 10:16:26,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-12 10:16:26,163 INFO L242 Difference]: Finished difference. Result has 216 places, 191 transitions, 480 flow [2022-07-12 10:16:26,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=216, PETRI_TRANSITIONS=191} [2022-07-12 10:16:26,164 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, 4 predicate places. [2022-07-12 10:16:26,164 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 191 transitions, 480 flow [2022-07-12 10:16:26,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 189.61111111111111) internal successors, (3413), 18 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,165 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:26,165 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] [2022-07-12 10:16:26,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:26,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 10:16:26,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash -30972408, now seen corresponding path program 1 times [2022-07-12 10:16:26,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:26,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369818118] [2022-07-12 10:16:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:26,409 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:26,430 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:26,430 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:26,430 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:26,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:26,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:16:26,431 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:26,431 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:26,431 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-12 10:16:26,451 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:26,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 268 transitions, 596 flow [2022-07-12 10:16:26,529 INFO L129 PetriNetUnfolder]: 64/479 cut-off events. [2022-07-12 10:16:26,529 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:16:26,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 479 events. 64/479 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1576 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 429. Up to 14 conditions per place. [2022-07-12 10:16:26,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 268 transitions, 596 flow [2022-07-12 10:16:26,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 268 transitions, 596 flow [2022-07-12 10:16:26,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:26,544 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:26,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:26,549 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-12 10:16:26,549 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:26,549 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:26,549 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] [2022-07-12 10:16:26,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:26,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:26,550 INFO L85 PathProgramCache]: Analyzing trace with hash 427631073, now seen corresponding path program 1 times [2022-07-12 10:16:26,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:26,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962872723] [2022-07-12 10:16:26,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962872723] [2022-07-12 10:16:26,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962872723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:26,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:26,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:26,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731949547] [2022-07-12 10:16:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:26,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:26,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:26,572 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 268 [2022-07-12 10:16:26,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 268 transitions, 596 flow. Second operand has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:26,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 268 [2022-07-12 10:16:26,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:26,637 INFO L129 PetriNetUnfolder]: 0/408 cut-off events. [2022-07-12 10:16:26,637 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-07-12 10:16:26,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 408 events. 0/408 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1411 event pairs, 0 based on Foata normal form. 126/520 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-12 10:16:26,638 INFO L132 encePairwiseOnDemand]: 228/268 looper letters, 6 selfloop transitions, 0 changer transitions 11/227 dead transitions. [2022-07-12 10:16:26,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 526 flow [2022-07-12 10:16:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 488 transitions. [2022-07-12 10:16:26,640 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9104477611940298 [2022-07-12 10:16:26,640 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 488 transitions. [2022-07-12 10:16:26,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 488 transitions. [2022-07-12 10:16:26,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:26,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 488 transitions. [2022-07-12 10:16:26,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.0) internal successors, (488), 2 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,642 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,642 INFO L186 Difference]: Start difference. First operand has 241 places, 268 transitions, 596 flow. Second operand 2 states and 488 transitions. [2022-07-12 10:16:26,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 526 flow [2022-07-12 10:16:26,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 227 transitions, 496 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:26,647 INFO L242 Difference]: Finished difference. Result has 241 places, 216 transitions, 462 flow [2022-07-12 10:16:26,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=462, PETRI_PLACES=241, PETRI_TRANSITIONS=216} [2022-07-12 10:16:26,648 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 0 predicate places. [2022-07-12 10:16:26,648 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 216 transitions, 462 flow [2022-07-12 10:16:26,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,648 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:26,648 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] [2022-07-12 10:16:26,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:16:26,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1369320286, now seen corresponding path program 1 times [2022-07-12 10:16:26,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:26,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241290755] [2022-07-12 10:16:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:26,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241290755] [2022-07-12 10:16:26,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241290755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:26,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:26,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:26,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614168103] [2022-07-12 10:16:26,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:26,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:26,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:26,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:26,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:26,669 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 268 [2022-07-12 10:16:26,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 216 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:26,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 268 [2022-07-12 10:16:26,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:26,742 INFO L129 PetriNetUnfolder]: 0/320 cut-off events. [2022-07-12 10:16:26,742 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:16:26,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 320 events. 0/320 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 881 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-12 10:16:26,743 INFO L132 encePairwiseOnDemand]: 265/268 looper letters, 15 selfloop transitions, 2 changer transitions 0/220 dead transitions. [2022-07-12 10:16:26,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 220 transitions, 504 flow [2022-07-12 10:16:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2022-07-12 10:16:26,745 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8208955223880597 [2022-07-12 10:16:26,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2022-07-12 10:16:26,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2022-07-12 10:16:26,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:26,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2022-07-12 10:16:26,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,749 INFO L186 Difference]: Start difference. First operand has 241 places, 216 transitions, 462 flow. Second operand 3 states and 660 transitions. [2022-07-12 10:16:26,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 220 transitions, 504 flow [2022-07-12 10:16:26,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 220 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:26,753 INFO L242 Difference]: Finished difference. Result has 233 places, 217 transitions, 474 flow [2022-07-12 10:16:26,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=474, PETRI_PLACES=233, PETRI_TRANSITIONS=217} [2022-07-12 10:16:26,754 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, -8 predicate places. [2022-07-12 10:16:26,754 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 217 transitions, 474 flow [2022-07-12 10:16:26,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,754 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:26,755 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] [2022-07-12 10:16:26,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 10:16:26,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash -910210314, now seen corresponding path program 1 times [2022-07-12 10:16:26,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:26,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940705848] [2022-07-12 10:16:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:26,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940705848] [2022-07-12 10:16:26,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940705848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:26,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863098264] [2022-07-12 10:16:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:26,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:26,785 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:26,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:16:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863098264] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:26,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:26,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:26,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098974637] [2022-07-12 10:16:26,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:26,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:26,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:26,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:26,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:26,930 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-07-12 10:16:26,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 217 transitions, 474 flow. Second operand has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:26,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-07-12 10:16:26,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:27,043 INFO L129 PetriNetUnfolder]: 0/298 cut-off events. [2022-07-12 10:16:27,043 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:16:27,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 298 events. 0/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 753 event pairs, 0 based on Foata normal form. 2/300 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:16:27,045 INFO L132 encePairwiseOnDemand]: 262/268 looper letters, 16 selfloop transitions, 9 changer transitions 0/227 dead transitions. [2022-07-12 10:16:27,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 546 flow [2022-07-12 10:16:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1944 transitions. [2022-07-12 10:16:27,049 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8059701492537313 [2022-07-12 10:16:27,049 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1944 transitions. [2022-07-12 10:16:27,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1944 transitions. [2022-07-12 10:16:27,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:27,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1944 transitions. [2022-07-12 10:16:27,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.0) internal successors, (1944), 9 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,058 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,058 INFO L186 Difference]: Start difference. First operand has 233 places, 217 transitions, 474 flow. Second operand 9 states and 1944 transitions. [2022-07-12 10:16:27,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 546 flow [2022-07-12 10:16:27,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 227 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:27,063 INFO L242 Difference]: Finished difference. Result has 243 places, 223 transitions, 522 flow [2022-07-12 10:16:27,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=522, PETRI_PLACES=243, PETRI_TRANSITIONS=223} [2022-07-12 10:16:27,064 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 2 predicate places. [2022-07-12 10:16:27,064 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 223 transitions, 522 flow [2022-07-12 10:16:27,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,065 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:27,065 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] [2022-07-12 10:16:27,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:27,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:27,280 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:27,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1557677727, now seen corresponding path program 1 times [2022-07-12 10:16:27,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:27,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39664949] [2022-07-12 10:16:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:27,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:27,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:27,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39664949] [2022-07-12 10:16:27,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39664949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:27,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788283950] [2022-07-12 10:16:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:27,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:27,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:27,337 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:27,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:16:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:27,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:27,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:27,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:27,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788283950] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:27,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:27,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:27,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502796380] [2022-07-12 10:16:27,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:27,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:27,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:27,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:27,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:27,590 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-07-12 10:16:27,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 223 transitions, 522 flow. Second operand has 18 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:27,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-07-12 10:16:27,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:27,781 INFO L129 PetriNetUnfolder]: 0/254 cut-off events. [2022-07-12 10:16:27,781 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:16:27,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 254 events. 0/254 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-12 10:16:27,783 INFO L132 encePairwiseOnDemand]: 263/268 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-07-12 10:16:27,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 232 transitions, 660 flow [2022-07-12 10:16:27,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4517 transitions. [2022-07-12 10:16:27,788 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8025941719971571 [2022-07-12 10:16:27,788 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4517 transitions. [2022-07-12 10:16:27,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4517 transitions. [2022-07-12 10:16:27,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:27,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4517 transitions. [2022-07-12 10:16:27,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 215.0952380952381) internal successors, (4517), 21 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,804 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,805 INFO L186 Difference]: Start difference. First operand has 243 places, 223 transitions, 522 flow. Second operand 21 states and 4517 transitions. [2022-07-12 10:16:27,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 232 transitions, 660 flow [2022-07-12 10:16:27,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-12 10:16:27,810 INFO L242 Difference]: Finished difference. Result has 248 places, 221 transitions, 558 flow [2022-07-12 10:16:27,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=248, PETRI_TRANSITIONS=221} [2022-07-12 10:16:27,811 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 7 predicate places. [2022-07-12 10:16:27,811 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 221 transitions, 558 flow [2022-07-12 10:16:27,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,812 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:27,812 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:27,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:28,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-12 10:16:28,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:28,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1257008543, now seen corresponding path program 1 times [2022-07-12 10:16:28,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:28,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906227277] [2022-07-12 10:16:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:28,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:28,063 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:28,089 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:28,089 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:28,090 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:28,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:28,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 10:16:28,090 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:28,094 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:28,094 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-12 10:16:28,114 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:28,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 270 places, 301 transitions, 679 flow [2022-07-12 10:16:28,201 INFO L129 PetriNetUnfolder]: 74/548 cut-off events. [2022-07-12 10:16:28,201 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-12 10:16:28,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 548 events. 74/548 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1844 event pairs, 0 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 505. Up to 16 conditions per place. [2022-07-12 10:16:28,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 301 transitions, 679 flow [2022-07-12 10:16:28,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 301 transitions, 679 flow [2022-07-12 10:16:28,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:28,220 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:28,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:28,224 INFO L129 PetriNetUnfolder]: 4/79 cut-off events. [2022-07-12 10:16:28,224 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:28,224 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:28,224 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] [2022-07-12 10:16:28,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1975059873, now seen corresponding path program 1 times [2022-07-12 10:16:28,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:28,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780887611] [2022-07-12 10:16:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:28,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:28,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:28,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780887611] [2022-07-12 10:16:28,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780887611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:28,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:28,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:28,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230705961] [2022-07-12 10:16:28,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:28,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:28,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:28,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:28,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:28,240 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 301 [2022-07-12 10:16:28,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 301 transitions, 679 flow. Second operand has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:28,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 301 [2022-07-12 10:16:28,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:28,317 INFO L129 PetriNetUnfolder]: 0/466 cut-off events. [2022-07-12 10:16:28,317 INFO L130 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-07-12 10:16:28,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 466 events. 0/466 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1662 event pairs, 0 based on Foata normal form. 166/616 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-07-12 10:16:28,318 INFO L132 encePairwiseOnDemand]: 255/301 looper letters, 7 selfloop transitions, 0 changer transitions 11/254 dead transitions. [2022-07-12 10:16:28,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 599 flow [2022-07-12 10:16:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:28,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 547 transitions. [2022-07-12 10:16:28,320 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9086378737541528 [2022-07-12 10:16:28,321 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 547 transitions. [2022-07-12 10:16:28,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 547 transitions. [2022-07-12 10:16:28,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:28,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 547 transitions. [2022-07-12 10:16:28,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,323 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,323 INFO L186 Difference]: Start difference. First operand has 270 places, 301 transitions, 679 flow. Second operand 2 states and 547 transitions. [2022-07-12 10:16:28,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 599 flow [2022-07-12 10:16:28,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 254 transitions, 557 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:28,328 INFO L242 Difference]: Finished difference. Result has 270 places, 243 transitions, 521 flow [2022-07-12 10:16:28,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=521, PETRI_PLACES=270, PETRI_TRANSITIONS=243} [2022-07-12 10:16:28,329 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 0 predicate places. [2022-07-12 10:16:28,329 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 243 transitions, 521 flow [2022-07-12 10:16:28,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:28,330 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] [2022-07-12 10:16:28,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-12 10:16:28,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash 178108514, now seen corresponding path program 1 times [2022-07-12 10:16:28,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:28,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243446046] [2022-07-12 10:16:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:28,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:28,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:28,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243446046] [2022-07-12 10:16:28,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243446046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:28,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:28,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:28,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458631710] [2022-07-12 10:16:28,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:28,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:28,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:28,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 301 [2022-07-12 10:16:28,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 243 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:28,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 301 [2022-07-12 10:16:28,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:28,448 INFO L129 PetriNetUnfolder]: 0/367 cut-off events. [2022-07-12 10:16:28,449 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:16:28,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 367 events. 0/367 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1051 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-12 10:16:28,450 INFO L132 encePairwiseOnDemand]: 298/301 looper letters, 16 selfloop transitions, 2 changer transitions 0/247 dead transitions. [2022-07-12 10:16:28,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 247 transitions, 565 flow [2022-07-12 10:16:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2022-07-12 10:16:28,452 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8183831672203765 [2022-07-12 10:16:28,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2022-07-12 10:16:28,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2022-07-12 10:16:28,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:28,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2022-07-12 10:16:28,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 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) [2022-07-12 10:16:28,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 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) [2022-07-12 10:16:28,456 INFO L186 Difference]: Start difference. First operand has 270 places, 243 transitions, 521 flow. Second operand 3 states and 739 transitions. [2022-07-12 10:16:28,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 247 transitions, 565 flow [2022-07-12 10:16:28,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 247 transitions, 565 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:28,460 INFO L242 Difference]: Finished difference. Result has 262 places, 244 transitions, 533 flow [2022-07-12 10:16:28,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=533, PETRI_PLACES=262, PETRI_TRANSITIONS=244} [2022-07-12 10:16:28,461 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, -8 predicate places. [2022-07-12 10:16:28,461 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 244 transitions, 533 flow [2022-07-12 10:16:28,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,462 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:28,462 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] [2022-07-12 10:16:28,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-12 10:16:28,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash -612046090, now seen corresponding path program 1 times [2022-07-12 10:16:28,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:28,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220064733] [2022-07-12 10:16:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:28,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:28,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:28,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220064733] [2022-07-12 10:16:28,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220064733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863665905] [2022-07-12 10:16:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:28,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:28,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:28,492 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:28,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:16:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:28,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:28,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:28,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863665905] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:28,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:28,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:28,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50839812] [2022-07-12 10:16:28,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:28,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:28,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:28,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:28,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:28,685 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-07-12 10:16:28,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 244 transitions, 533 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:28,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-07-12 10:16:28,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:28,801 INFO L129 PetriNetUnfolder]: 0/345 cut-off events. [2022-07-12 10:16:28,801 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-12 10:16:28,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 345 events. 0/345 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 920 event pairs, 0 based on Foata normal form. 2/347 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-12 10:16:28,802 INFO L132 encePairwiseOnDemand]: 295/301 looper letters, 17 selfloop transitions, 9 changer transitions 0/254 dead transitions. [2022-07-12 10:16:28,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 607 flow [2022-07-12 10:16:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2179 transitions. [2022-07-12 10:16:28,805 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8043558508674787 [2022-07-12 10:16:28,805 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2179 transitions. [2022-07-12 10:16:28,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2179 transitions. [2022-07-12 10:16:28,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:28,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2179 transitions. [2022-07-12 10:16:28,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 242.11111111111111) internal successors, (2179), 9 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,829 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,829 INFO L186 Difference]: Start difference. First operand has 262 places, 244 transitions, 533 flow. Second operand 9 states and 2179 transitions. [2022-07-12 10:16:28,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 607 flow [2022-07-12 10:16:28,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 254 transitions, 605 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:28,833 INFO L242 Difference]: Finished difference. Result has 272 places, 250 transitions, 581 flow [2022-07-12 10:16:28,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=581, PETRI_PLACES=272, PETRI_TRANSITIONS=250} [2022-07-12 10:16:28,834 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 2 predicate places. [2022-07-12 10:16:28,834 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 250 transitions, 581 flow [2022-07-12 10:16:28,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,835 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:28,835 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] [2022-07-12 10:16:28,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:29,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 10:16:29,048 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash 289006049, now seen corresponding path program 1 times [2022-07-12 10:16:29,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:29,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468060159] [2022-07-12 10:16:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:29,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:29,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:29,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468060159] [2022-07-12 10:16:29,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468060159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:29,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066185579] [2022-07-12 10:16:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:29,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:29,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:29,118 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:29,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:16:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:29,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:29,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:29,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:29,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066185579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:29,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:29,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:29,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311839642] [2022-07-12 10:16:29,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:29,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:29,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:29,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:29,360 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-07-12 10:16:29,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 250 transitions, 581 flow. Second operand has 18 states, 18 states have (on average 241.61111111111111) internal successors, (4349), 18 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:29,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-07-12 10:16:29,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:29,575 INFO L129 PetriNetUnfolder]: 0/301 cut-off events. [2022-07-12 10:16:29,576 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-12 10:16:29,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 301 events. 0/301 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 634 event pairs, 0 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-12 10:16:29,578 INFO L132 encePairwiseOnDemand]: 295/301 looper letters, 25 selfloop transitions, 21 changer transitions 0/274 dead transitions. [2022-07-12 10:16:29,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 274 transitions, 781 flow [2022-07-12 10:16:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5069 transitions. [2022-07-12 10:16:29,586 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8019300743553235 [2022-07-12 10:16:29,586 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5069 transitions. [2022-07-12 10:16:29,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5069 transitions. [2022-07-12 10:16:29,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:29,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5069 transitions. [2022-07-12 10:16:29,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 241.38095238095238) internal successors, (5069), 21 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,604 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,604 INFO L186 Difference]: Start difference. First operand has 272 places, 250 transitions, 581 flow. Second operand 21 states and 5069 transitions. [2022-07-12 10:16:29,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 274 transitions, 781 flow [2022-07-12 10:16:29,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 274 transitions, 767 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:29,611 INFO L242 Difference]: Finished difference. Result has 296 places, 263 transitions, 705 flow [2022-07-12 10:16:29,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=705, PETRI_PLACES=296, PETRI_TRANSITIONS=263} [2022-07-12 10:16:29,612 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 26 predicate places. [2022-07-12 10:16:29,612 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 263 transitions, 705 flow [2022-07-12 10:16:29,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 241.61111111111111) internal successors, (4349), 18 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,613 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:29,614 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:29,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 10:16:29,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash -143485893, now seen corresponding path program 1 times [2022-07-12 10:16:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:29,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634718139] [2022-07-12 10:16:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:29,857 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:29,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:29,889 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:29,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:29,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:29,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 10:16:29,889 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:29,890 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:29,890 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-12 10:16:29,912 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:29,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 299 places, 334 transitions, 764 flow [2022-07-12 10:16:30,003 INFO L129 PetriNetUnfolder]: 84/617 cut-off events. [2022-07-12 10:16:30,004 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-12 10:16:30,020 INFO L84 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 617 events. 84/617 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2100 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 582. Up to 18 conditions per place. [2022-07-12 10:16:30,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 334 transitions, 764 flow [2022-07-12 10:16:30,028 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 334 transitions, 764 flow [2022-07-12 10:16:30,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:30,030 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:30,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:30,034 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-12 10:16:30,034 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:30,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:30,034 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:30,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:30,035 INFO L85 PathProgramCache]: Analyzing trace with hash -145277214, now seen corresponding path program 1 times [2022-07-12 10:16:30,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:30,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453407625] [2022-07-12 10:16:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:30,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453407625] [2022-07-12 10:16:30,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453407625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:30,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:30,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:30,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200849199] [2022-07-12 10:16:30,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:30,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:30,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:30,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:30,054 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 334 [2022-07-12 10:16:30,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 334 transitions, 764 flow. Second operand has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:30,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 334 [2022-07-12 10:16:30,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:30,199 INFO L129 PetriNetUnfolder]: 0/502 cut-off events. [2022-07-12 10:16:30,199 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-12 10:16:30,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 502 events. 0/502 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1802 event pairs, 0 based on Foata normal form. 1024/1510 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-12 10:16:30,201 INFO L132 encePairwiseOnDemand]: 279/334 looper letters, 17 selfloop transitions, 2 changer transitions 11/285 dead transitions. [2022-07-12 10:16:30,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 285 transitions, 704 flow [2022-07-12 10:16:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2022-07-12 10:16:30,202 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.875249500998004 [2022-07-12 10:16:30,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2022-07-12 10:16:30,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2022-07-12 10:16:30,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:30,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2022-07-12 10:16:30,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,205 INFO L186 Difference]: Start difference. First operand has 299 places, 334 transitions, 764 flow. Second operand 3 states and 877 transitions. [2022-07-12 10:16:30,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 285 transitions, 704 flow [2022-07-12 10:16:30,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 285 transitions, 648 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:30,210 INFO L242 Difference]: Finished difference. Result has 301 places, 271 transitions, 592 flow [2022-07-12 10:16:30,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=592, PETRI_PLACES=301, PETRI_TRANSITIONS=271} [2022-07-12 10:16:30,210 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 2 predicate places. [2022-07-12 10:16:30,211 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 271 transitions, 592 flow [2022-07-12 10:16:30,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,211 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:30,211 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] [2022-07-12 10:16:30,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-12 10:16:30,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:30,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:30,212 INFO L85 PathProgramCache]: Analyzing trace with hash 878346838, now seen corresponding path program 1 times [2022-07-12 10:16:30,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:30,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095370036] [2022-07-12 10:16:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:30,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:30,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095370036] [2022-07-12 10:16:30,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095370036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:30,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354373984] [2022-07-12 10:16:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:30,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:30,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:30,239 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:30,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:16:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:30,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354373984] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:30,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:30,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:30,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509488352] [2022-07-12 10:16:30,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:30,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:30,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:30,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:30,404 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-07-12 10:16:30,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 271 transitions, 592 flow. Second operand has 10 states, 10 states have (on average 267.3) internal successors, (2673), 10 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:30,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-07-12 10:16:30,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:30,543 INFO L129 PetriNetUnfolder]: 0/392 cut-off events. [2022-07-12 10:16:30,543 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:16:30,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 502 conditions, 392 events. 0/392 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1098 event pairs, 0 based on Foata normal form. 2/394 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-12 10:16:30,544 INFO L132 encePairwiseOnDemand]: 328/334 looper letters, 18 selfloop transitions, 9 changer transitions 0/281 dead transitions. [2022-07-12 10:16:30,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 281 transitions, 668 flow [2022-07-12 10:16:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2414 transitions. [2022-07-12 10:16:30,547 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8030605455755156 [2022-07-12 10:16:30,547 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2414 transitions. [2022-07-12 10:16:30,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2414 transitions. [2022-07-12 10:16:30,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:30,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2414 transitions. [2022-07-12 10:16:30,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 268.22222222222223) internal successors, (2414), 9 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,554 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,554 INFO L186 Difference]: Start difference. First operand has 301 places, 271 transitions, 592 flow. Second operand 9 states and 2414 transitions. [2022-07-12 10:16:30,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 281 transitions, 668 flow [2022-07-12 10:16:30,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 281 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:30,559 INFO L242 Difference]: Finished difference. Result has 300 places, 277 transitions, 640 flow [2022-07-12 10:16:30,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=640, PETRI_PLACES=300, PETRI_TRANSITIONS=277} [2022-07-12 10:16:30,560 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 1 predicate places. [2022-07-12 10:16:30,560 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 277 transitions, 640 flow [2022-07-12 10:16:30,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 267.3) internal successors, (2673), 10 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,561 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:30,561 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] [2022-07-12 10:16:30,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:30,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-12 10:16:30,775 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:30,776 INFO L85 PathProgramCache]: Analyzing trace with hash -776023295, now seen corresponding path program 1 times [2022-07-12 10:16:30,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:30,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950430194] [2022-07-12 10:16:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:30,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:30,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950430194] [2022-07-12 10:16:30,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950430194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:30,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375589419] [2022-07-12 10:16:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:30,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:30,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:30,850 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:30,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:16:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:30,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:30,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:31,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:31,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375589419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:31,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:31,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:31,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025671010] [2022-07-12 10:16:31,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:31,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:31,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:31,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:31,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:31,133 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-07-12 10:16:31,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 277 transitions, 640 flow. Second operand has 18 states, 18 states have (on average 267.6111111111111) internal successors, (4817), 18 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:31,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-07-12 10:16:31,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:31,389 INFO L129 PetriNetUnfolder]: 0/348 cut-off events. [2022-07-12 10:16:31,389 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-12 10:16:31,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 348 events. 0/348 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 804 event pairs, 0 based on Foata normal form. 4/352 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-12 10:16:31,390 INFO L132 encePairwiseOnDemand]: 328/334 looper letters, 26 selfloop transitions, 21 changer transitions 0/301 dead transitions. [2022-07-12 10:16:31,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 301 transitions, 842 flow [2022-07-12 10:16:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5616 transitions. [2022-07-12 10:16:31,395 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8006843455945253 [2022-07-12 10:16:31,396 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5616 transitions. [2022-07-12 10:16:31,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5616 transitions. [2022-07-12 10:16:31,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:31,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5616 transitions. [2022-07-12 10:16:31,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 267.42857142857144) internal successors, (5616), 21 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 334.0) internal successors, (7348), 22 states have internal predecessors, (7348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,414 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 334.0) internal successors, (7348), 22 states have internal predecessors, (7348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,414 INFO L186 Difference]: Start difference. First operand has 300 places, 277 transitions, 640 flow. Second operand 21 states and 5616 transitions. [2022-07-12 10:16:31,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 301 transitions, 842 flow [2022-07-12 10:16:31,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 301 transitions, 828 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:31,420 INFO L242 Difference]: Finished difference. Result has 324 places, 290 transitions, 764 flow [2022-07-12 10:16:31,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=764, PETRI_PLACES=324, PETRI_TRANSITIONS=290} [2022-07-12 10:16:31,421 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 25 predicate places. [2022-07-12 10:16:31,421 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 290 transitions, 764 flow [2022-07-12 10:16:31,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 267.6111111111111) internal successors, (4817), 18 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,422 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:31,423 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:31,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:31,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-12 10:16:31,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:31,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1408771997, now seen corresponding path program 1 times [2022-07-12 10:16:31,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:31,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583326558] [2022-07-12 10:16:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:31,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:31,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583326558] [2022-07-12 10:16:31,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583326558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:31,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256322678] [2022-07-12 10:16:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:31,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:31,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:31,803 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:31,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:16:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:31,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:31,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:32,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:32,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256322678] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:32,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:32,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:32,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706471372] [2022-07-12 10:16:32,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:32,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:32,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:32,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:32,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:32,330 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-07-12 10:16:32,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 290 transitions, 764 flow. Second operand has 34 states, 34 states have (on average 267.79411764705884) internal successors, (9105), 34 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:32,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:32,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-07-12 10:16:32,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:32,647 INFO L129 PetriNetUnfolder]: 0/326 cut-off events. [2022-07-12 10:16:32,648 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-12 10:16:32,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 326 events. 0/326 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-12 10:16:32,649 INFO L132 encePairwiseOnDemand]: 329/334 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-07-12 10:16:32,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 296 transitions, 912 flow [2022-07-12 10:16:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:16:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:16:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7209 transitions. [2022-07-12 10:16:32,656 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7994011976047904 [2022-07-12 10:16:32,656 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7209 transitions. [2022-07-12 10:16:32,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7209 transitions. [2022-07-12 10:16:32,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:32,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7209 transitions. [2022-07-12 10:16:32,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 267.0) internal successors, (7209), 27 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:32,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 334.0) internal successors, (9352), 28 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:32,678 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 334.0) internal successors, (9352), 28 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:32,678 INFO L186 Difference]: Start difference. First operand has 324 places, 290 transitions, 764 flow. Second operand 27 states and 7209 transitions. [2022-07-12 10:16:32,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 296 transitions, 912 flow [2022-07-12 10:16:32,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:32,685 INFO L242 Difference]: Finished difference. Result has 326 places, 282 transitions, 751 flow [2022-07-12 10:16:32,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=751, PETRI_PLACES=326, PETRI_TRANSITIONS=282} [2022-07-12 10:16:32,686 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 27 predicate places. [2022-07-12 10:16:32,686 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 282 transitions, 751 flow [2022-07-12 10:16:32,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 267.79411764705884) internal successors, (9105), 34 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:32,688 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:32,688 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:32,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:32,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-12 10:16:32,903 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash 22455350, now seen corresponding path program 1 times [2022-07-12 10:16:32,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:32,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346636519] [2022-07-12 10:16:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:32,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:32,922 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:32,958 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:32,958 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:32,959 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:32,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:32,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-12 10:16:32,959 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:32,961 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:32,961 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-12 10:16:32,986 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:32,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 328 places, 367 transitions, 851 flow [2022-07-12 10:16:33,114 INFO L129 PetriNetUnfolder]: 94/686 cut-off events. [2022-07-12 10:16:33,114 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-12 10:16:33,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 686 events. 94/686 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2360 event pairs, 0 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 660. Up to 20 conditions per place. [2022-07-12 10:16:33,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 367 transitions, 851 flow [2022-07-12 10:16:33,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 328 places, 367 transitions, 851 flow [2022-07-12 10:16:33,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:33,141 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:33,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:33,144 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-12 10:16:33,144 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:33,145 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:33,145 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] [2022-07-12 10:16:33,145 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1955489826, now seen corresponding path program 1 times [2022-07-12 10:16:33,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:33,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741556819] [2022-07-12 10:16:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:33,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:33,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:33,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741556819] [2022-07-12 10:16:33,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741556819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:33,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:33,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:33,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968886833] [2022-07-12 10:16:33,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:33,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:33,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:33,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:33,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:33,163 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 367 [2022-07-12 10:16:33,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 367 transitions, 851 flow. Second operand has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:33,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 367 [2022-07-12 10:16:33,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:33,299 INFO L129 PetriNetUnfolder]: 0/560 cut-off events. [2022-07-12 10:16:33,299 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-12 10:16:33,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 560 events. 0/560 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2050 event pairs, 0 based on Foata normal form. 1312/1854 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-12 10:16:33,301 INFO L132 encePairwiseOnDemand]: 306/367 looper letters, 18 selfloop transitions, 2 changer transitions 11/312 dead transitions. [2022-07-12 10:16:33,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 312 transitions, 781 flow [2022-07-12 10:16:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2022-07-12 10:16:33,303 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8737511353315168 [2022-07-12 10:16:33,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2022-07-12 10:16:33,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2022-07-12 10:16:33,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:33,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2022-07-12 10:16:33,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,307 INFO L186 Difference]: Start difference. First operand has 328 places, 367 transitions, 851 flow. Second operand 3 states and 962 transitions. [2022-07-12 10:16:33,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 312 transitions, 781 flow [2022-07-12 10:16:33,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 312 transitions, 709 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:33,312 INFO L242 Difference]: Finished difference. Result has 330 places, 298 transitions, 651 flow [2022-07-12 10:16:33,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=651, PETRI_PLACES=330, PETRI_TRANSITIONS=298} [2022-07-12 10:16:33,313 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 2 predicate places. [2022-07-12 10:16:33,313 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 298 transitions, 651 flow [2022-07-12 10:16:33,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,314 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:33,314 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:33,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-12 10:16:33,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:33,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:33,314 INFO L85 PathProgramCache]: Analyzing trace with hash -733998826, now seen corresponding path program 1 times [2022-07-12 10:16:33,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:33,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871799780] [2022-07-12 10:16:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:33,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:33,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:33,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871799780] [2022-07-12 10:16:33,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871799780] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:33,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036007796] [2022-07-12 10:16:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:33,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:33,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:33,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:33,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:16:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:33,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:33,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:33,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:33,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036007796] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:33,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:33,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:33,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15211406] [2022-07-12 10:16:33,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:33,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:33,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:33,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:33,521 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-07-12 10:16:33,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 298 transitions, 651 flow. Second operand has 10 states, 10 states have (on average 293.3) internal successors, (2933), 10 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:33,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-07-12 10:16:33,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:33,688 INFO L129 PetriNetUnfolder]: 0/439 cut-off events. [2022-07-12 10:16:33,688 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-12 10:16:33,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 439 events. 0/439 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1262 event pairs, 0 based on Foata normal form. 2/441 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-12 10:16:33,690 INFO L132 encePairwiseOnDemand]: 361/367 looper letters, 19 selfloop transitions, 9 changer transitions 0/308 dead transitions. [2022-07-12 10:16:33,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 308 transitions, 729 flow [2022-07-12 10:16:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2649 transitions. [2022-07-12 10:16:33,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8019981834695731 [2022-07-12 10:16:33,696 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2649 transitions. [2022-07-12 10:16:33,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2649 transitions. [2022-07-12 10:16:33,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:33,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2649 transitions. [2022-07-12 10:16:33,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 294.3333333333333) internal successors, (2649), 9 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,704 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,704 INFO L186 Difference]: Start difference. First operand has 330 places, 298 transitions, 651 flow. Second operand 9 states and 2649 transitions. [2022-07-12 10:16:33,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 308 transitions, 729 flow [2022-07-12 10:16:33,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 308 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:33,709 INFO L242 Difference]: Finished difference. Result has 329 places, 304 transitions, 699 flow [2022-07-12 10:16:33,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=699, PETRI_PLACES=329, PETRI_TRANSITIONS=304} [2022-07-12 10:16:33,713 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 1 predicate places. [2022-07-12 10:16:33,713 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 304 transitions, 699 flow [2022-07-12 10:16:33,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 293.3) internal successors, (2933), 10 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,713 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:33,714 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] [2022-07-12 10:16:33,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:33,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:33,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash -457798463, now seen corresponding path program 1 times [2022-07-12 10:16:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:33,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669823162] [2022-07-12 10:16:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:33,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:33,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:33,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669823162] [2022-07-12 10:16:33,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669823162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:33,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750866154] [2022-07-12 10:16:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:33,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:33,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:33,982 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:33,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:16:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:34,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:34,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:34,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:34,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750866154] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:34,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:34,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:34,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554777649] [2022-07-12 10:16:34,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:34,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:34,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:34,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:34,264 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-07-12 10:16:34,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 304 transitions, 699 flow. Second operand has 18 states, 18 states have (on average 293.6111111111111) internal successors, (5285), 18 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:34,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-07-12 10:16:34,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:34,541 INFO L129 PetriNetUnfolder]: 0/395 cut-off events. [2022-07-12 10:16:34,542 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-12 10:16:34,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 395 events. 0/395 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 974 event pairs, 0 based on Foata normal form. 4/399 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:16:34,543 INFO L132 encePairwiseOnDemand]: 361/367 looper letters, 27 selfloop transitions, 21 changer transitions 0/328 dead transitions. [2022-07-12 10:16:34,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 328 transitions, 903 flow [2022-07-12 10:16:34,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:34,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6163 transitions. [2022-07-12 10:16:34,551 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7996626443492929 [2022-07-12 10:16:34,551 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6163 transitions. [2022-07-12 10:16:34,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6163 transitions. [2022-07-12 10:16:34,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:34,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6163 transitions. [2022-07-12 10:16:34,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 293.4761904761905) internal successors, (6163), 21 states have internal predecessors, (6163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,571 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,571 INFO L186 Difference]: Start difference. First operand has 329 places, 304 transitions, 699 flow. Second operand 21 states and 6163 transitions. [2022-07-12 10:16:34,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 328 transitions, 903 flow [2022-07-12 10:16:34,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 328 transitions, 889 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:34,578 INFO L242 Difference]: Finished difference. Result has 353 places, 317 transitions, 823 flow [2022-07-12 10:16:34,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=823, PETRI_PLACES=353, PETRI_TRANSITIONS=317} [2022-07-12 10:16:34,579 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 25 predicate places. [2022-07-12 10:16:34,579 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 317 transitions, 823 flow [2022-07-12 10:16:34,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 293.6111111111111) internal successors, (5285), 18 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,580 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:34,580 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:34,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:34,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-12 10:16:34,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash 110716963, now seen corresponding path program 1 times [2022-07-12 10:16:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:34,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738050769] [2022-07-12 10:16:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:34,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:34,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:34,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738050769] [2022-07-12 10:16:34,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738050769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:34,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710094702] [2022-07-12 10:16:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:34,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:34,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:34,944 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:34,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:16:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:35,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:35,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:35,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:35,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710094702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:35,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:35,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184002248] [2022-07-12 10:16:35,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:35,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:35,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:35,482 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-07-12 10:16:35,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 317 transitions, 823 flow. Second operand has 34 states, 34 states have (on average 293.79411764705884) internal successors, (9989), 34 states have internal predecessors, (9989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:35,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-07-12 10:16:35,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:35,909 INFO L129 PetriNetUnfolder]: 0/362 cut-off events. [2022-07-12 10:16:35,909 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-12 10:16:35,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 362 events. 0/362 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:16:35,910 INFO L132 encePairwiseOnDemand]: 362/367 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-07-12 10:16:35,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 328 transitions, 1017 flow [2022-07-12 10:16:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 10:16:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-12 10:16:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8791 transitions. [2022-07-12 10:16:35,921 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.798455949137148 [2022-07-12 10:16:35,922 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8791 transitions. [2022-07-12 10:16:35,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8791 transitions. [2022-07-12 10:16:35,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:35,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8791 transitions. [2022-07-12 10:16:35,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 293.03333333333336) internal successors, (8791), 30 states have internal predecessors, (8791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 367.0) internal successors, (11377), 31 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,963 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 367.0) internal successors, (11377), 31 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,963 INFO L186 Difference]: Start difference. First operand has 353 places, 317 transitions, 823 flow. Second operand 30 states and 8791 transitions. [2022-07-12 10:16:35,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 328 transitions, 1017 flow [2022-07-12 10:16:35,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:35,971 INFO L242 Difference]: Finished difference. Result has 358 places, 312 transitions, 834 flow [2022-07-12 10:16:35,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=834, PETRI_PLACES=358, PETRI_TRANSITIONS=312} [2022-07-12 10:16:35,972 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 30 predicate places. [2022-07-12 10:16:35,972 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 312 transitions, 834 flow [2022-07-12 10:16:35,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 293.79411764705884) internal successors, (9989), 34 states have internal predecessors, (9989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,974 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:35,974 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:36,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:36,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 10:16:36,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:36,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:36,200 INFO L85 PathProgramCache]: Analyzing trace with hash -209069326, now seen corresponding path program 1 times [2022-07-12 10:16:36,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:36,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750714623] [2022-07-12 10:16:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:36,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:36,241 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:36,270 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:36,271 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:36,271 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:36,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:36,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-12 10:16:36,271 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:36,272 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:36,272 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-12 10:16:36,300 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:36,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 357 places, 400 transitions, 940 flow [2022-07-12 10:16:36,436 INFO L129 PetriNetUnfolder]: 104/755 cut-off events. [2022-07-12 10:16:36,436 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-12 10:16:36,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 755 events. 104/755 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2595 event pairs, 0 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 739. Up to 22 conditions per place. [2022-07-12 10:16:36,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 400 transitions, 940 flow [2022-07-12 10:16:36,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 400 transitions, 940 flow [2022-07-12 10:16:36,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:36,472 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:36,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:36,476 INFO L129 PetriNetUnfolder]: 5/82 cut-off events. [2022-07-12 10:16:36,476 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:36,477 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:36,477 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] [2022-07-12 10:16:36,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash -312573599, now seen corresponding path program 1 times [2022-07-12 10:16:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:36,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227893356] [2022-07-12 10:16:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:36,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:36,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227893356] [2022-07-12 10:16:36,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227893356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:36,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:36,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:36,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846544414] [2022-07-12 10:16:36,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:36,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:36,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:36,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:36,493 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 400 [2022-07-12 10:16:36,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 400 transitions, 940 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:36,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 400 [2022-07-12 10:16:36,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:36,633 INFO L129 PetriNetUnfolder]: 0/640 cut-off events. [2022-07-12 10:16:36,633 INFO L130 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-07-12 10:16:36,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 640 events. 0/640 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2413 event pairs, 0 based on Foata normal form. 322/940 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-12 10:16:36,635 INFO L132 encePairwiseOnDemand]: 336/400 looper letters, 10 selfloop transitions, 0 changer transitions 11/335 dead transitions. [2022-07-12 10:16:36,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 830 flow [2022-07-12 10:16:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 724 transitions. [2022-07-12 10:16:36,637 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.905 [2022-07-12 10:16:36,637 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 724 transitions. [2022-07-12 10:16:36,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 724 transitions. [2022-07-12 10:16:36,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:36,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 724 transitions. [2022-07-12 10:16:36,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 362.0) internal successors, (724), 2 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,640 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,640 INFO L186 Difference]: Start difference. First operand has 357 places, 400 transitions, 940 flow. Second operand 2 states and 724 transitions. [2022-07-12 10:16:36,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 830 flow [2022-07-12 10:16:36,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 335 transitions, 740 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:36,645 INFO L242 Difference]: Finished difference. Result has 357 places, 324 transitions, 698 flow [2022-07-12 10:16:36,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=698, PETRI_PLACES=357, PETRI_TRANSITIONS=324} [2022-07-12 10:16:36,647 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 0 predicate places. [2022-07-12 10:16:36,647 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 324 transitions, 698 flow [2022-07-12 10:16:36,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,648 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:36,648 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] [2022-07-12 10:16:36,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-12 10:16:36,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:36,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:36,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2109524958, now seen corresponding path program 1 times [2022-07-12 10:16:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:36,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408135033] [2022-07-12 10:16:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:36,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:36,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:36,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408135033] [2022-07-12 10:16:36,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408135033] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:36,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:36,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:36,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291912647] [2022-07-12 10:16:36,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:36,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:36,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:36,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:36,667 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 400 [2022-07-12 10:16:36,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 324 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:36,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 400 [2022-07-12 10:16:36,668 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:36,774 INFO L129 PetriNetUnfolder]: 0/508 cut-off events. [2022-07-12 10:16:36,774 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-12 10:16:36,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 508 events. 0/508 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1561 event pairs, 0 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-12 10:16:36,776 INFO L132 encePairwiseOnDemand]: 397/400 looper letters, 19 selfloop transitions, 2 changer transitions 0/328 dead transitions. [2022-07-12 10:16:36,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 328 transitions, 748 flow [2022-07-12 10:16:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2022-07-12 10:16:36,780 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8133333333333334 [2022-07-12 10:16:36,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2022-07-12 10:16:36,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2022-07-12 10:16:36,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:36,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2022-07-12 10:16:36,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,784 INFO L186 Difference]: Start difference. First operand has 357 places, 324 transitions, 698 flow. Second operand 3 states and 976 transitions. [2022-07-12 10:16:36,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 328 transitions, 748 flow [2022-07-12 10:16:36,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 328 transitions, 748 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:36,790 INFO L242 Difference]: Finished difference. Result has 349 places, 325 transitions, 710 flow [2022-07-12 10:16:36,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=349, PETRI_TRANSITIONS=325} [2022-07-12 10:16:36,791 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, -8 predicate places. [2022-07-12 10:16:36,791 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 325 transitions, 710 flow [2022-07-12 10:16:36,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,791 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:36,791 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] [2022-07-12 10:16:36,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-12 10:16:36,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:36,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1154115786, now seen corresponding path program 1 times [2022-07-12 10:16:36,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:36,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269734461] [2022-07-12 10:16:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:36,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:36,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:36,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269734461] [2022-07-12 10:16:36,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269734461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:36,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59158627] [2022-07-12 10:16:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:36,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:36,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:36,819 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:36,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:16:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:36,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:36,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:36,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:37,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59158627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:37,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:37,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:37,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964055647] [2022-07-12 10:16:37,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:37,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:37,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:37,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:37,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:37,021 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-07-12 10:16:37,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 325 transitions, 710 flow. Second operand has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:37,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-07-12 10:16:37,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:37,207 INFO L129 PetriNetUnfolder]: 0/486 cut-off events. [2022-07-12 10:16:37,208 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-12 10:16:37,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 486 events. 0/486 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1432 event pairs, 0 based on Foata normal form. 2/488 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-12 10:16:37,214 INFO L132 encePairwiseOnDemand]: 394/400 looper letters, 20 selfloop transitions, 9 changer transitions 0/335 dead transitions. [2022-07-12 10:16:37,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 790 flow [2022-07-12 10:16:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2884 transitions. [2022-07-12 10:16:37,217 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8011111111111111 [2022-07-12 10:16:37,217 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2884 transitions. [2022-07-12 10:16:37,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2884 transitions. [2022-07-12 10:16:37,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:37,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2884 transitions. [2022-07-12 10:16:37,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.44444444444446) internal successors, (2884), 9 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,225 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,225 INFO L186 Difference]: Start difference. First operand has 349 places, 325 transitions, 710 flow. Second operand 9 states and 2884 transitions. [2022-07-12 10:16:37,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 790 flow [2022-07-12 10:16:37,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 335 transitions, 788 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:37,232 INFO L242 Difference]: Finished difference. Result has 359 places, 331 transitions, 758 flow [2022-07-12 10:16:37,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=758, PETRI_PLACES=359, PETRI_TRANSITIONS=331} [2022-07-12 10:16:37,233 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 2 predicate places. [2022-07-12 10:16:37,233 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 331 transitions, 758 flow [2022-07-12 10:16:37,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,234 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:37,234 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] [2022-07-12 10:16:37,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-12 10:16:37,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:37,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:37,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:37,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1243680545, now seen corresponding path program 1 times [2022-07-12 10:16:37,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:37,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995167745] [2022-07-12 10:16:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:37,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:37,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:37,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995167745] [2022-07-12 10:16:37,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995167745] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035596290] [2022-07-12 10:16:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:37,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:37,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:37,504 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:37,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 10:16:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:37,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:37,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:37,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035596290] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:37,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:37,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:37,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251177180] [2022-07-12 10:16:37,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:37,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:37,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:37,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:37,769 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-07-12 10:16:37,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 331 transitions, 758 flow. Second operand has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:37,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-07-12 10:16:37,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:38,048 INFO L129 PetriNetUnfolder]: 0/442 cut-off events. [2022-07-12 10:16:38,049 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-12 10:16:38,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 442 events. 0/442 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1144 event pairs, 0 based on Foata normal form. 4/446 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:16:38,050 INFO L132 encePairwiseOnDemand]: 394/400 looper letters, 28 selfloop transitions, 21 changer transitions 0/355 dead transitions. [2022-07-12 10:16:38,051 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 355 transitions, 964 flow [2022-07-12 10:16:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6710 transitions. [2022-07-12 10:16:38,058 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7988095238095239 [2022-07-12 10:16:38,058 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6710 transitions. [2022-07-12 10:16:38,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6710 transitions. [2022-07-12 10:16:38,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:38,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6710 transitions. [2022-07-12 10:16:38,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 319.5238095238095) internal successors, (6710), 21 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,076 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,076 INFO L186 Difference]: Start difference. First operand has 359 places, 331 transitions, 758 flow. Second operand 21 states and 6710 transitions. [2022-07-12 10:16:38,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 355 transitions, 964 flow [2022-07-12 10:16:38,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 355 transitions, 950 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:38,083 INFO L242 Difference]: Finished difference. Result has 383 places, 344 transitions, 882 flow [2022-07-12 10:16:38,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=882, PETRI_PLACES=383, PETRI_TRANSITIONS=344} [2022-07-12 10:16:38,109 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 26 predicate places. [2022-07-12 10:16:38,109 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 344 transitions, 882 flow [2022-07-12 10:16:38,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,110 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:38,110 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:38,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:38,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:38,311 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:38,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1389100285, now seen corresponding path program 1 times [2022-07-12 10:16:38,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:38,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979011009] [2022-07-12 10:16:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:38,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:38,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:38,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979011009] [2022-07-12 10:16:38,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979011009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:38,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567015794] [2022-07-12 10:16:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:38,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:38,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:38,464 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:38,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 10:16:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:38,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:38,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567015794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:38,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:38,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:38,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469765585] [2022-07-12 10:16:38,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:38,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:38,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:38,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:38,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:38,999 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-07-12 10:16:39,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 344 transitions, 882 flow. Second operand has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:39,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-07-12 10:16:39,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:39,383 INFO L129 PetriNetUnfolder]: 0/398 cut-off events. [2022-07-12 10:16:39,383 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-12 10:16:39,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 398 events. 0/398 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-12 10:16:39,384 INFO L132 encePairwiseOnDemand]: 395/400 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-07-12 10:16:39,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-07-12 10:16:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 10:16:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-12 10:16:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10529 transitions. [2022-07-12 10:16:39,395 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7976515151515151 [2022-07-12 10:16:39,395 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10529 transitions. [2022-07-12 10:16:39,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10529 transitions. [2022-07-12 10:16:39,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:39,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10529 transitions. [2022-07-12 10:16:39,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 319.06060606060606) internal successors, (10529), 33 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 400.0) internal successors, (13600), 34 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,423 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 400.0) internal successors, (13600), 34 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,423 INFO L186 Difference]: Start difference. First operand has 383 places, 344 transitions, 882 flow. Second operand 33 states and 10529 transitions. [2022-07-12 10:16:39,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-07-12 10:16:39,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:39,431 INFO L242 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-07-12 10:16:39,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=917, PETRI_PLACES=391, PETRI_TRANSITIONS=342} [2022-07-12 10:16:39,432 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 34 predicate places. [2022-07-12 10:16:39,432 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-07-12 10:16:39,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:39,434 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:39,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:39,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:39,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2124296463, now seen corresponding path program 1 times [2022-07-12 10:16:39,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:39,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39442890] [2022-07-12 10:16:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:39,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:39,669 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:39,696 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:39,696 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:39,697 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:39,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:39,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-12 10:16:39,697 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:16:39,698 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:39,698 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-12 10:16:39,725 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:39,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 386 places, 433 transitions, 1031 flow [2022-07-12 10:16:39,878 INFO L129 PetriNetUnfolder]: 114/824 cut-off events. [2022-07-12 10:16:39,878 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-07-12 10:16:39,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 824 events. 114/824 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2879 event pairs, 0 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 819. Up to 24 conditions per place. [2022-07-12 10:16:39,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 433 transitions, 1031 flow [2022-07-12 10:16:39,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 433 transitions, 1031 flow [2022-07-12 10:16:39,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:39,910 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:39,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:39,914 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-12 10:16:39,914 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:39,914 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:39,914 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] [2022-07-12 10:16:39,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:39,915 INFO L85 PathProgramCache]: Analyzing trace with hash 544580322, now seen corresponding path program 1 times [2022-07-12 10:16:39,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:39,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684131349] [2022-07-12 10:16:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:39,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:39,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:39,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684131349] [2022-07-12 10:16:39,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684131349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:39,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:39,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050907519] [2022-07-12 10:16:39,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:39,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:39,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:39,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:39,933 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 433 [2022-07-12 10:16:39,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 433 transitions, 1031 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:39,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 433 [2022-07-12 10:16:39,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:40,118 INFO L129 PetriNetUnfolder]: 0/676 cut-off events. [2022-07-12 10:16:40,118 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-07-12 10:16:40,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 676 events. 0/676 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2562 event pairs, 0 based on Foata normal form. 1993/2647 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-07-12 10:16:40,120 INFO L132 encePairwiseOnDemand]: 360/433 looper letters, 20 selfloop transitions, 2 changer transitions 11/366 dead transitions. [2022-07-12 10:16:40,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 366 transitions, 941 flow [2022-07-12 10:16:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1132 transitions. [2022-07-12 10:16:40,122 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8714395688991532 [2022-07-12 10:16:40,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1132 transitions. [2022-07-12 10:16:40,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1132 transitions. [2022-07-12 10:16:40,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:40,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1132 transitions. [2022-07-12 10:16:40,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.3333333333333) internal successors, (1132), 3 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,126 INFO L186 Difference]: Start difference. First operand has 386 places, 433 transitions, 1031 flow. Second operand 3 states and 1132 transitions. [2022-07-12 10:16:40,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 366 transitions, 941 flow [2022-07-12 10:16:40,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 366 transitions, 831 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:40,132 INFO L242 Difference]: Finished difference. Result has 388 places, 352 transitions, 769 flow [2022-07-12 10:16:40,132 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=769, PETRI_PLACES=388, PETRI_TRANSITIONS=352} [2022-07-12 10:16:40,133 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 2 predicate places. [2022-07-12 10:16:40,133 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 352 transitions, 769 flow [2022-07-12 10:16:40,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,133 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:40,134 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] [2022-07-12 10:16:40,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-12 10:16:40,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash -382004042, now seen corresponding path program 1 times [2022-07-12 10:16:40,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:40,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436301423] [2022-07-12 10:16:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:40,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:40,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:40,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436301423] [2022-07-12 10:16:40,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436301423] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:40,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799655301] [2022-07-12 10:16:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:40,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:40,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:40,164 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:40,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 10:16:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:40,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:40,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:40,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799655301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:40,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:40,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:40,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750538601] [2022-07-12 10:16:40,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:40,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:40,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:40,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:40,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:40,382 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-07-12 10:16:40,399 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 352 transitions, 769 flow. Second operand has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:40,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-07-12 10:16:40,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:40,553 INFO L129 PetriNetUnfolder]: 0/533 cut-off events. [2022-07-12 10:16:40,553 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-12 10:16:40,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 533 events. 0/533 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1602 event pairs, 0 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-12 10:16:40,554 INFO L132 encePairwiseOnDemand]: 427/433 looper letters, 21 selfloop transitions, 9 changer transitions 0/362 dead transitions. [2022-07-12 10:16:40,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 362 transitions, 851 flow [2022-07-12 10:16:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3119 transitions. [2022-07-12 10:16:40,558 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.800359250705671 [2022-07-12 10:16:40,558 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3119 transitions. [2022-07-12 10:16:40,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3119 transitions. [2022-07-12 10:16:40,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:40,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3119 transitions. [2022-07-12 10:16:40,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 346.55555555555554) internal successors, (3119), 9 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,566 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,567 INFO L186 Difference]: Start difference. First operand has 388 places, 352 transitions, 769 flow. Second operand 9 states and 3119 transitions. [2022-07-12 10:16:40,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 362 transitions, 851 flow [2022-07-12 10:16:40,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 362 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:40,573 INFO L242 Difference]: Finished difference. Result has 387 places, 358 transitions, 817 flow [2022-07-12 10:16:40,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=817, PETRI_PLACES=387, PETRI_TRANSITIONS=358} [2022-07-12 10:16:40,574 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 1 predicate places. [2022-07-12 10:16:40,574 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 358 transitions, 817 flow [2022-07-12 10:16:40,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,575 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:40,575 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] [2022-07-12 10:16:40,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:40,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-12 10:16:40,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash 33446433, now seen corresponding path program 1 times [2022-07-12 10:16:40,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:40,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288714854] [2022-07-12 10:16:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:40,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:40,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:40,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288714854] [2022-07-12 10:16:40,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288714854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:40,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607198789] [2022-07-12 10:16:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:40,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:40,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:40,844 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:40,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 10:16:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:41,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:41,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:41,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607198789] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:41,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:41,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:41,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640700643] [2022-07-12 10:16:41,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:41,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:41,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:41,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:41,140 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-07-12 10:16:41,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 358 transitions, 817 flow. Second operand has 18 states, 18 states have (on average 345.6111111111111) internal successors, (6221), 18 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:41,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-07-12 10:16:41,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:41,396 INFO L129 PetriNetUnfolder]: 0/489 cut-off events. [2022-07-12 10:16:41,396 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-07-12 10:16:41,396 INFO L84 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 489 events. 0/489 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1314 event pairs, 0 based on Foata normal form. 4/493 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-12 10:16:41,397 INFO L132 encePairwiseOnDemand]: 427/433 looper letters, 29 selfloop transitions, 21 changer transitions 0/382 dead transitions. [2022-07-12 10:16:41,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 382 transitions, 1025 flow [2022-07-12 10:16:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7257 transitions. [2022-07-12 10:16:41,404 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7980864401187727 [2022-07-12 10:16:41,404 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7257 transitions. [2022-07-12 10:16:41,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7257 transitions. [2022-07-12 10:16:41,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:41,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7257 transitions. [2022-07-12 10:16:41,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 345.57142857142856) internal successors, (7257), 21 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 433.0) internal successors, (9526), 22 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,446 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 433.0) internal successors, (9526), 22 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,447 INFO L186 Difference]: Start difference. First operand has 387 places, 358 transitions, 817 flow. Second operand 21 states and 7257 transitions. [2022-07-12 10:16:41,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 382 transitions, 1025 flow [2022-07-12 10:16:41,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 382 transitions, 1011 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:41,454 INFO L242 Difference]: Finished difference. Result has 411 places, 371 transitions, 941 flow [2022-07-12 10:16:41,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=941, PETRI_PLACES=411, PETRI_TRANSITIONS=371} [2022-07-12 10:16:41,456 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 25 predicate places. [2022-07-12 10:16:41,456 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 371 transitions, 941 flow [2022-07-12 10:16:41,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 345.6111111111111) internal successors, (6221), 18 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,457 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:41,457 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:41,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:41,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-12 10:16:41,671 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1613256445, now seen corresponding path program 1 times [2022-07-12 10:16:41,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:41,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974166453] [2022-07-12 10:16:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:41,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:41,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:41,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974166453] [2022-07-12 10:16:41,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974166453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:41,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240359421] [2022-07-12 10:16:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:41,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:41,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:41,822 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:41,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 10:16:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:41,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:42,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:42,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240359421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:42,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:42,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:42,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635809416] [2022-07-12 10:16:42,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:42,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:42,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:42,380 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-07-12 10:16:42,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 371 transitions, 941 flow. Second operand has 34 states, 34 states have (on average 345.79411764705884) internal successors, (11757), 34 states have internal predecessors, (11757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:42,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-07-12 10:16:42,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:42,859 INFO L129 PetriNetUnfolder]: 0/434 cut-off events. [2022-07-12 10:16:42,860 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-12 10:16:42,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 434 events. 0/434 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:16:42,861 INFO L132 encePairwiseOnDemand]: 428/433 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-07-12 10:16:42,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 392 transitions, 1227 flow [2022-07-12 10:16:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:16:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:16:42,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12423 transitions. [2022-07-12 10:16:42,870 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969591993841416 [2022-07-12 10:16:42,870 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12423 transitions. [2022-07-12 10:16:42,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12423 transitions. [2022-07-12 10:16:42,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:42,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12423 transitions. [2022-07-12 10:16:42,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 345.0833333333333) internal successors, (12423), 36 states have internal predecessors, (12423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 433.0) internal successors, (16021), 37 states have internal predecessors, (16021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,900 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 433.0) internal successors, (16021), 37 states have internal predecessors, (16021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,900 INFO L186 Difference]: Start difference. First operand has 411 places, 371 transitions, 941 flow. Second operand 36 states and 12423 transitions. [2022-07-12 10:16:42,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 392 transitions, 1227 flow [2022-07-12 10:16:42,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:42,909 INFO L242 Difference]: Finished difference. Result has 422 places, 372 transitions, 1000 flow [2022-07-12 10:16:42,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1000, PETRI_PLACES=422, PETRI_TRANSITIONS=372} [2022-07-12 10:16:42,910 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 36 predicate places. [2022-07-12 10:16:42,910 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 372 transitions, 1000 flow [2022-07-12 10:16:42,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 345.79411764705884) internal successors, (11757), 34 states have internal predecessors, (11757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,912 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:42,912 INFO L200 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:42,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:43,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-12 10:16:43,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1736277805, now seen corresponding path program 1 times [2022-07-12 10:16:43,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:43,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47056067] [2022-07-12 10:16:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:43,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:43,169 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:43,203 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:43,203 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:43,203 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:43,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:43,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-12 10:16:43,204 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:43,205 WARN L231 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:43,205 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-07-12 10:16:43,239 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:43,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 415 places, 466 transitions, 1124 flow [2022-07-12 10:16:43,423 INFO L129 PetriNetUnfolder]: 124/893 cut-off events. [2022-07-12 10:16:43,423 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-12 10:16:43,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 893 events. 124/893 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3184 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 900. Up to 26 conditions per place. [2022-07-12 10:16:43,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 415 places, 466 transitions, 1124 flow [2022-07-12 10:16:43,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 415 places, 466 transitions, 1124 flow [2022-07-12 10:16:43,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:43,461 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:43,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:43,464 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2022-07-12 10:16:43,464 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:43,464 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:43,464 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] [2022-07-12 10:16:43,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1170144863, now seen corresponding path program 1 times [2022-07-12 10:16:43,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:43,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837210124] [2022-07-12 10:16:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:43,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:43,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837210124] [2022-07-12 10:16:43,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837210124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:43,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:43,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030509389] [2022-07-12 10:16:43,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:43,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:43,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:43,499 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 466 [2022-07-12 10:16:43,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 466 transitions, 1124 flow. Second operand has 2 states, 2 states have (on average 377.5) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:43,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 466 [2022-07-12 10:16:43,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:43,666 INFO L129 PetriNetUnfolder]: 0/756 cut-off events. [2022-07-12 10:16:43,667 INFO L130 PetriNetUnfolder]: For 430/430 co-relation queries the response was YES. [2022-07-12 10:16:43,667 INFO L84 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 756 events. 0/756 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2909 event pairs, 0 based on Foata normal form. 456/1186 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-12 10:16:43,668 INFO L132 encePairwiseOnDemand]: 390/466 looper letters, 12 selfloop transitions, 0 changer transitions 11/389 dead transitions. [2022-07-12 10:16:43,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 389 transitions, 994 flow [2022-07-12 10:16:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 842 transitions. [2022-07-12 10:16:43,669 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9034334763948498 [2022-07-12 10:16:43,669 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 842 transitions. [2022-07-12 10:16:43,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 842 transitions. [2022-07-12 10:16:43,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:43,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 842 transitions. [2022-07-12 10:16:43,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 421.0) internal successors, (842), 2 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 466.0) internal successors, (1398), 3 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,671 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 466.0) internal successors, (1398), 3 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,671 INFO L186 Difference]: Start difference. First operand has 415 places, 466 transitions, 1124 flow. Second operand 2 states and 842 transitions. [2022-07-12 10:16:43,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 389 transitions, 994 flow [2022-07-12 10:16:43,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 389 transitions, 862 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:43,679 INFO L242 Difference]: Finished difference. Result has 415 places, 378 transitions, 816 flow [2022-07-12 10:16:43,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=816, PETRI_PLACES=415, PETRI_TRANSITIONS=378} [2022-07-12 10:16:43,680 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 0 predicate places. [2022-07-12 10:16:43,680 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 378 transitions, 816 flow [2022-07-12 10:16:43,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 377.5) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,680 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:43,680 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] [2022-07-12 10:16:43,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-12 10:16:43,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1327871074, now seen corresponding path program 1 times [2022-07-12 10:16:43,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621836655] [2022-07-12 10:16:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:43,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:43,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:43,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621836655] [2022-07-12 10:16:43,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621836655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:43,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:43,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984855044] [2022-07-12 10:16:43,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:43,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:43,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:43,712 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 466 [2022-07-12 10:16:43,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 378 transitions, 816 flow. Second operand has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:43,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 466 [2022-07-12 10:16:43,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:43,896 INFO L129 PetriNetUnfolder]: 0/602 cut-off events. [2022-07-12 10:16:43,896 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-12 10:16:43,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 602 events. 0/602 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1901 event pairs, 0 based on Foata normal form. 0/590 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-07-12 10:16:43,898 INFO L132 encePairwiseOnDemand]: 463/466 looper letters, 21 selfloop transitions, 2 changer transitions 0/382 dead transitions. [2022-07-12 10:16:43,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 382 transitions, 870 flow [2022-07-12 10:16:43,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1134 transitions. [2022-07-12 10:16:43,900 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8111587982832618 [2022-07-12 10:16:43,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1134 transitions. [2022-07-12 10:16:43,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1134 transitions. [2022-07-12 10:16:43,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:43,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1134 transitions. [2022-07-12 10:16:43,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.0) internal successors, (1134), 3 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,907 INFO L186 Difference]: Start difference. First operand has 415 places, 378 transitions, 816 flow. Second operand 3 states and 1134 transitions. [2022-07-12 10:16:43,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 382 transitions, 870 flow [2022-07-12 10:16:43,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 382 transitions, 870 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:43,914 INFO L242 Difference]: Finished difference. Result has 407 places, 379 transitions, 828 flow [2022-07-12 10:16:43,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=828, PETRI_PLACES=407, PETRI_TRANSITIONS=379} [2022-07-12 10:16:43,915 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, -8 predicate places. [2022-07-12 10:16:43,915 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 379 transitions, 828 flow [2022-07-12 10:16:43,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,915 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:43,916 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] [2022-07-12 10:16:43,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-12 10:16:43,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1582336406, now seen corresponding path program 1 times [2022-07-12 10:16:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:43,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453557913] [2022-07-12 10:16:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:43,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453557913] [2022-07-12 10:16:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453557913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360367978] [2022-07-12 10:16:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:43,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:43,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:43,945 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:43,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 10:16:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:44,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:44,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:44,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360367978] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:44,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:44,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:44,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919756003] [2022-07-12 10:16:44,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:44,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:44,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:44,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:44,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:44,174 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-07-12 10:16:44,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 379 transitions, 828 flow. Second operand has 10 states, 10 states have (on average 371.3) internal successors, (3713), 10 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:44,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:44,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-07-12 10:16:44,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:44,372 INFO L129 PetriNetUnfolder]: 0/580 cut-off events. [2022-07-12 10:16:44,372 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-12 10:16:44,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 580 events. 0/580 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1782 event pairs, 0 based on Foata normal form. 2/582 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-12 10:16:44,373 INFO L132 encePairwiseOnDemand]: 460/466 looper letters, 22 selfloop transitions, 9 changer transitions 0/389 dead transitions. [2022-07-12 10:16:44,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 389 transitions, 912 flow [2022-07-12 10:16:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3354 transitions. [2022-07-12 10:16:44,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7997138769670958 [2022-07-12 10:16:44,378 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3354 transitions. [2022-07-12 10:16:44,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3354 transitions. [2022-07-12 10:16:44,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:44,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3354 transitions. [2022-07-12 10:16:44,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 372.6666666666667) internal successors, (3354), 9 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:44,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 466.0) internal successors, (4660), 10 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:44,385 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 466.0) internal successors, (4660), 10 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:44,385 INFO L186 Difference]: Start difference. First operand has 407 places, 379 transitions, 828 flow. Second operand 9 states and 3354 transitions. [2022-07-12 10:16:44,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 389 transitions, 912 flow [2022-07-12 10:16:44,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 389 transitions, 910 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:44,392 INFO L242 Difference]: Finished difference. Result has 417 places, 385 transitions, 876 flow [2022-07-12 10:16:44,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=876, PETRI_PLACES=417, PETRI_TRANSITIONS=385} [2022-07-12 10:16:44,393 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 2 predicate places. [2022-07-12 10:16:44,394 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 385 transitions, 876 flow [2022-07-12 10:16:44,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 371.3) internal successors, (3713), 10 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:44,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:44,394 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] [2022-07-12 10:16:44,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:44,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:44,618 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash 206466497, now seen corresponding path program 1 times [2022-07-12 10:16:44,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:44,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461743142] [2022-07-12 10:16:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:44,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461743142] [2022-07-12 10:16:44,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461743142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:44,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932361428] [2022-07-12 10:16:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:44,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:44,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:44,672 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:44,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 10:16:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:44,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:44,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:44,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932361428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:44,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:44,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:44,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490862284] [2022-07-12 10:16:44,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:44,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:44,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:44,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:44,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:45,000 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-07-12 10:16:45,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 385 transitions, 876 flow. Second operand has 18 states, 18 states have (on average 371.6111111111111) internal successors, (6689), 18 states have internal predecessors, (6689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:45,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-07-12 10:16:45,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:45,325 INFO L129 PetriNetUnfolder]: 0/536 cut-off events. [2022-07-12 10:16:45,325 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-07-12 10:16:45,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 536 events. 0/536 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1490 event pairs, 0 based on Foata normal form. 4/540 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-12 10:16:45,326 INFO L132 encePairwiseOnDemand]: 460/466 looper letters, 30 selfloop transitions, 21 changer transitions 0/409 dead transitions. [2022-07-12 10:16:45,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 409 transitions, 1086 flow [2022-07-12 10:16:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7804 transitions. [2022-07-12 10:16:45,330 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7974657674228489 [2022-07-12 10:16:45,331 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7804 transitions. [2022-07-12 10:16:45,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7804 transitions. [2022-07-12 10:16:45,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:45,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7804 transitions. [2022-07-12 10:16:45,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 371.6190476190476) internal successors, (7804), 21 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 466.0) internal successors, (10252), 22 states have internal predecessors, (10252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,346 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 466.0) internal successors, (10252), 22 states have internal predecessors, (10252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,347 INFO L186 Difference]: Start difference. First operand has 417 places, 385 transitions, 876 flow. Second operand 21 states and 7804 transitions. [2022-07-12 10:16:45,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 409 transitions, 1086 flow [2022-07-12 10:16:45,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 409 transitions, 1072 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:45,355 INFO L242 Difference]: Finished difference. Result has 441 places, 398 transitions, 1000 flow [2022-07-12 10:16:45,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1000, PETRI_PLACES=441, PETRI_TRANSITIONS=398} [2022-07-12 10:16:45,356 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 26 predicate places. [2022-07-12 10:16:45,356 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 398 transitions, 1000 flow [2022-07-12 10:16:45,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 371.6111111111111) internal successors, (6689), 18 states have internal predecessors, (6689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:45,357 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:45,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-12 10:16:45,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:45,575 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:45,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:45,575 INFO L85 PathProgramCache]: Analyzing trace with hash -561751517, now seen corresponding path program 1 times [2022-07-12 10:16:45,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:45,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28377627] [2022-07-12 10:16:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:45,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:45,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:45,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28377627] [2022-07-12 10:16:45,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28377627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:45,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816660029] [2022-07-12 10:16:45,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:45,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:45,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:45,720 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:45,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 10:16:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:46,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:46,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816660029] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:46,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:46,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:46,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904062066] [2022-07-12 10:16:46,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:46,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:46,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:46,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:46,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:46,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-07-12 10:16:46,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 398 transitions, 1000 flow. Second operand has 34 states, 34 states have (on average 371.79411764705884) internal successors, (12641), 34 states have internal predecessors, (12641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:46,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:46,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-07-12 10:16:46,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:46,904 INFO L129 PetriNetUnfolder]: 0/470 cut-off events. [2022-07-12 10:16:46,905 INFO L130 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-07-12 10:16:46,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 470 events. 0/470 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1071 event pairs, 0 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-07-12 10:16:46,906 INFO L132 encePairwiseOnDemand]: 461/466 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-07-12 10:16:46,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 424 transitions, 1332 flow [2022-07-12 10:16:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 10:16:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-12 10:16:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14473 transitions. [2022-07-12 10:16:46,916 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7963574336964895 [2022-07-12 10:16:46,917 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14473 transitions. [2022-07-12 10:16:46,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14473 transitions. [2022-07-12 10:16:46,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:46,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14473 transitions. [2022-07-12 10:16:46,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 371.1025641025641) internal successors, (14473), 39 states have internal predecessors, (14473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:46,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 466.0) internal successors, (18640), 40 states have internal predecessors, (18640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:46,951 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 466.0) internal successors, (18640), 40 states have internal predecessors, (18640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:46,951 INFO L186 Difference]: Start difference. First operand has 441 places, 398 transitions, 1000 flow. Second operand 39 states and 14473 transitions. [2022-07-12 10:16:46,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 424 transitions, 1332 flow [2022-07-12 10:16:46,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:46,960 INFO L242 Difference]: Finished difference. Result has 455 places, 402 transitions, 1083 flow [2022-07-12 10:16:46,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1083, PETRI_PLACES=455, PETRI_TRANSITIONS=402} [2022-07-12 10:16:46,961 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 40 predicate places. [2022-07-12 10:16:46,961 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 402 transitions, 1083 flow [2022-07-12 10:16:46,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 371.79411764705884) internal successors, (12641), 34 states have internal predecessors, (12641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:46,963 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:46,964 INFO L200 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:46,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:47,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-12 10:16:47,183 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:47,184 INFO L85 PathProgramCache]: Analyzing trace with hash -981893652, now seen corresponding path program 1 times [2022-07-12 10:16:47,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:47,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791535446] [2022-07-12 10:16:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:47,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:47,206 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:47,260 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:47,261 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:47,261 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:47,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:47,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-12 10:16:47,261 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:16:47,262 WARN L231 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:47,262 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-07-12 10:16:47,294 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:47,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 444 places, 499 transitions, 1219 flow [2022-07-12 10:16:47,509 INFO L129 PetriNetUnfolder]: 134/962 cut-off events. [2022-07-12 10:16:47,509 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-12 10:16:47,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 962 events. 134/962 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3437 event pairs, 0 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 982. Up to 28 conditions per place. [2022-07-12 10:16:47,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 444 places, 499 transitions, 1219 flow [2022-07-12 10:16:47,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 499 transitions, 1219 flow [2022-07-12 10:16:47,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:47,570 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:47,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:47,574 INFO L129 PetriNetUnfolder]: 2/73 cut-off events. [2022-07-12 10:16:47,574 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:47,574 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:47,574 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] [2022-07-12 10:16:47,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash 240347298, now seen corresponding path program 1 times [2022-07-12 10:16:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:47,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556721462] [2022-07-12 10:16:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:47,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:47,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:47,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556721462] [2022-07-12 10:16:47,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556721462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:47,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:47,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:47,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033473201] [2022-07-12 10:16:47,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:47,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:47,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:47,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:47,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:47,594 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 499 [2022-07-12 10:16:47,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 499 transitions, 1219 flow. Second operand has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:47,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:47,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 499 [2022-07-12 10:16:47,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:47,899 INFO L129 PetriNetUnfolder]: 0/792 cut-off events. [2022-07-12 10:16:47,900 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-12 10:16:47,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 792 events. 0/792 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3047 event pairs, 0 based on Foata normal form. 2819/3585 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-07-12 10:16:47,901 INFO L132 encePairwiseOnDemand]: 414/499 looper letters, 22 selfloop transitions, 2 changer transitions 11/420 dead transitions. [2022-07-12 10:16:47,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 420 transitions, 1109 flow [2022-07-12 10:16:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1302 transitions. [2022-07-12 10:16:47,905 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8697394789579158 [2022-07-12 10:16:47,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1302 transitions. [2022-07-12 10:16:47,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1302 transitions. [2022-07-12 10:16:47,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:47,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1302 transitions. [2022-07-12 10:16:47,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 434.0) internal successors, (1302), 3 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:47,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:47,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:47,908 INFO L186 Difference]: Start difference. First operand has 444 places, 499 transitions, 1219 flow. Second operand 3 states and 1302 transitions. [2022-07-12 10:16:47,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 420 transitions, 1109 flow [2022-07-12 10:16:47,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 420 transitions, 953 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:47,917 INFO L242 Difference]: Finished difference. Result has 446 places, 406 transitions, 887 flow [2022-07-12 10:16:47,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=887, PETRI_PLACES=446, PETRI_TRANSITIONS=406} [2022-07-12 10:16:47,919 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 2 predicate places. [2022-07-12 10:16:47,919 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 406 transitions, 887 flow [2022-07-12 10:16:47,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:47,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:47,920 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] [2022-07-12 10:16:47,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-12 10:16:47,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:47,921 INFO L85 PathProgramCache]: Analyzing trace with hash 443938262, now seen corresponding path program 1 times [2022-07-12 10:16:47,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:47,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953704904] [2022-07-12 10:16:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:47,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:47,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:47,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953704904] [2022-07-12 10:16:47,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953704904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:47,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186638295] [2022-07-12 10:16:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:47,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:47,956 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:47,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 10:16:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:48,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:48,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:48,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:48,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186638295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:48,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:48,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881070624] [2022-07-12 10:16:48,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:48,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:48,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:48,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:48,202 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-07-12 10:16:48,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 406 transitions, 887 flow. Second operand has 10 states, 10 states have (on average 397.3) internal successors, (3973), 10 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:48,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:48,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-07-12 10:16:48,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:48,432 INFO L129 PetriNetUnfolder]: 0/627 cut-off events. [2022-07-12 10:16:48,433 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-12 10:16:48,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 627 events. 0/627 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1953 event pairs, 0 based on Foata normal form. 2/629 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-12 10:16:48,435 INFO L132 encePairwiseOnDemand]: 493/499 looper letters, 23 selfloop transitions, 9 changer transitions 0/416 dead transitions. [2022-07-12 10:16:48,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 416 transitions, 973 flow [2022-07-12 10:16:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3589 transitions. [2022-07-12 10:16:48,438 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7991538632821198 [2022-07-12 10:16:48,438 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3589 transitions. [2022-07-12 10:16:48,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3589 transitions. [2022-07-12 10:16:48,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:48,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3589 transitions. [2022-07-12 10:16:48,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 398.77777777777777) internal successors, (3589), 9 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:48,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:48,445 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:48,445 INFO L186 Difference]: Start difference. First operand has 446 places, 406 transitions, 887 flow. Second operand 9 states and 3589 transitions. [2022-07-12 10:16:48,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 416 transitions, 973 flow [2022-07-12 10:16:48,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 416 transitions, 971 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:48,453 INFO L242 Difference]: Finished difference. Result has 445 places, 412 transitions, 935 flow [2022-07-12 10:16:48,454 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=935, PETRI_PLACES=445, PETRI_TRANSITIONS=412} [2022-07-12 10:16:48,455 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 1 predicate places. [2022-07-12 10:16:48,455 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 412 transitions, 935 flow [2022-07-12 10:16:48,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 397.3) internal successors, (3973), 10 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:48,456 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:48,457 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] [2022-07-12 10:16:48,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-12 10:16:48,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-12 10:16:48,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1762740737, now seen corresponding path program 1 times [2022-07-12 10:16:48,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:48,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951047366] [2022-07-12 10:16:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:48,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:48,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951047366] [2022-07-12 10:16:48,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951047366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:48,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014487622] [2022-07-12 10:16:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:48,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:48,721 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:48,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 10:16:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:48,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:49,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014487622] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:49,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:49,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241698432] [2022-07-12 10:16:49,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:49,064 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-07-12 10:16:49,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 412 transitions, 935 flow. Second operand has 18 states, 18 states have (on average 397.6111111111111) internal successors, (7157), 18 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:49,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-07-12 10:16:49,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:49,421 INFO L129 PetriNetUnfolder]: 0/583 cut-off events. [2022-07-12 10:16:49,421 INFO L130 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-07-12 10:16:49,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 583 events. 0/583 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1654 event pairs, 0 based on Foata normal form. 4/587 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-12 10:16:49,423 INFO L132 encePairwiseOnDemand]: 493/499 looper letters, 31 selfloop transitions, 21 changer transitions 0/436 dead transitions. [2022-07-12 10:16:49,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 436 transitions, 1147 flow [2022-07-12 10:16:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8351 transitions. [2022-07-12 10:16:49,430 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969271877087508 [2022-07-12 10:16:49,430 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8351 transitions. [2022-07-12 10:16:49,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8351 transitions. [2022-07-12 10:16:49,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:49,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8351 transitions. [2022-07-12 10:16:49,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 397.6666666666667) internal successors, (8351), 21 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 499.0) internal successors, (10978), 22 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,449 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 499.0) internal successors, (10978), 22 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,449 INFO L186 Difference]: Start difference. First operand has 445 places, 412 transitions, 935 flow. Second operand 21 states and 8351 transitions. [2022-07-12 10:16:49,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 436 transitions, 1147 flow [2022-07-12 10:16:49,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 436 transitions, 1133 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:49,458 INFO L242 Difference]: Finished difference. Result has 469 places, 425 transitions, 1059 flow [2022-07-12 10:16:49,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1059, PETRI_PLACES=469, PETRI_TRANSITIONS=425} [2022-07-12 10:16:49,459 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 25 predicate places. [2022-07-12 10:16:49,459 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 425 transitions, 1059 flow [2022-07-12 10:16:49,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 397.6111111111111) internal successors, (7157), 18 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,460 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:49,460 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:49,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:49,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-12 10:16:49,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1765414499, now seen corresponding path program 1 times [2022-07-12 10:16:49,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:49,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214072053] [2022-07-12 10:16:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:49,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:49,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214072053] [2022-07-12 10:16:49,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214072053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125920700] [2022-07-12 10:16:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:49,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:49,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:49,813 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:49,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 10:16:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:50,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:50,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:50,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125920700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:50,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:50,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:50,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803361990] [2022-07-12 10:16:50,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:50,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:50,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:50,348 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-07-12 10:16:50,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 425 transitions, 1059 flow. Second operand has 34 states, 34 states have (on average 397.79411764705884) internal successors, (13525), 34 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:50,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-07-12 10:16:50,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:50,963 INFO L129 PetriNetUnfolder]: 0/506 cut-off events. [2022-07-12 10:16:50,963 INFO L130 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-07-12 10:16:50,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 506 events. 0/506 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-12 10:16:50,965 INFO L132 encePairwiseOnDemand]: 494/499 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-07-12 10:16:50,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 456 transitions, 1437 flow [2022-07-12 10:16:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 10:16:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-12 10:16:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16679 transitions. [2022-07-12 10:16:50,972 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7958297547475904 [2022-07-12 10:16:50,973 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16679 transitions. [2022-07-12 10:16:50,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16679 transitions. [2022-07-12 10:16:50,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:50,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16679 transitions. [2022-07-12 10:16:50,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 397.1190476190476) internal successors, (16679), 42 states have internal predecessors, (16679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 499.0) internal successors, (21457), 43 states have internal predecessors, (21457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,999 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 499.0) internal successors, (21457), 43 states have internal predecessors, (21457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,999 INFO L186 Difference]: Start difference. First operand has 469 places, 425 transitions, 1059 flow. Second operand 42 states and 16679 transitions. [2022-07-12 10:16:50,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 456 transitions, 1437 flow [2022-07-12 10:16:51,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:51,006 INFO L242 Difference]: Finished difference. Result has 486 places, 432 transitions, 1166 flow [2022-07-12 10:16:51,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1166, PETRI_PLACES=486, PETRI_TRANSITIONS=432} [2022-07-12 10:16:51,007 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 42 predicate places. [2022-07-12 10:16:51,008 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 432 transitions, 1166 flow [2022-07-12 10:16:51,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 397.79411764705884) internal successors, (13525), 34 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,009 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:51,009 INFO L200 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:51,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-12 10:16:51,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:51,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:51,210 INFO L85 PathProgramCache]: Analyzing trace with hash -639908372, now seen corresponding path program 1 times [2022-07-12 10:16:51,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:51,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823464170] [2022-07-12 10:16:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:51,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:51,235 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:51,270 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:51,270 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:51,270 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:51,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:51,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-12 10:16:51,271 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:51,271 WARN L231 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:51,271 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-07-12 10:16:51,304 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:51,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 473 places, 532 transitions, 1316 flow [2022-07-12 10:16:51,495 INFO L129 PetriNetUnfolder]: 144/1031 cut-off events. [2022-07-12 10:16:51,495 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-12 10:16:51,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 1031 events. 144/1031 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3703 event pairs, 0 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 1065. Up to 30 conditions per place. [2022-07-12 10:16:51,532 INFO L82 GeneralOperation]: Start removeDead. Operand has 473 places, 532 transitions, 1316 flow [2022-07-12 10:16:51,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 473 places, 532 transitions, 1316 flow [2022-07-12 10:16:51,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:51,547 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:51,547 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:51,549 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-12 10:16:51,550 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:51,550 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:51,550 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] [2022-07-12 10:16:51,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:51,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1576976290, now seen corresponding path program 1 times [2022-07-12 10:16:51,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:51,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600824475] [2022-07-12 10:16:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:51,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:51,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:51,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600824475] [2022-07-12 10:16:51,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600824475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:51,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:51,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:51,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657758798] [2022-07-12 10:16:51,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:51,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:51,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:51,568 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 532 [2022-07-12 10:16:51,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 532 transitions, 1316 flow. Second operand has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:51,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 532 [2022-07-12 10:16:51,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:51,859 INFO L129 PetriNetUnfolder]: 0/850 cut-off events. [2022-07-12 10:16:51,859 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-12 10:16:51,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 850 events. 0/850 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3300 event pairs, 0 based on Foata normal form. 3286/4108 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2022-07-12 10:16:51,861 INFO L132 encePairwiseOnDemand]: 441/532 looper letters, 23 selfloop transitions, 2 changer transitions 11/447 dead transitions. [2022-07-12 10:16:51,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 447 transitions, 1196 flow [2022-07-12 10:16:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1387 transitions. [2022-07-12 10:16:51,863 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8690476190476191 [2022-07-12 10:16:51,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1387 transitions. [2022-07-12 10:16:51,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1387 transitions. [2022-07-12 10:16:51,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:51,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1387 transitions. [2022-07-12 10:16:51,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 462.3333333333333) internal successors, (1387), 3 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,867 INFO L186 Difference]: Start difference. First operand has 473 places, 532 transitions, 1316 flow. Second operand 3 states and 1387 transitions. [2022-07-12 10:16:51,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 447 transitions, 1196 flow [2022-07-12 10:16:51,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 447 transitions, 1014 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:51,875 INFO L242 Difference]: Finished difference. Result has 475 places, 433 transitions, 946 flow [2022-07-12 10:16:51,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=946, PETRI_PLACES=475, PETRI_TRANSITIONS=433} [2022-07-12 10:16:51,876 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 2 predicate places. [2022-07-12 10:16:51,876 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 433 transitions, 946 flow [2022-07-12 10:16:51,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,876 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:51,877 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] [2022-07-12 10:16:51,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-12 10:16:51,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:51,877 INFO L85 PathProgramCache]: Analyzing trace with hash 497768822, now seen corresponding path program 1 times [2022-07-12 10:16:51,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:51,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238333454] [2022-07-12 10:16:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:51,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:51,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:51,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238333454] [2022-07-12 10:16:51,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238333454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:51,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889805563] [2022-07-12 10:16:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:51,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:51,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:51,905 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:51,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 10:16:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:52,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889805563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:52,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:52,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:52,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922037354] [2022-07-12 10:16:52,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:52,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:52,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:52,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:52,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:52,188 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-07-12 10:16:52,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 433 transitions, 946 flow. Second operand has 10 states, 10 states have (on average 423.3) internal successors, (4233), 10 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:52,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-07-12 10:16:52,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:52,393 INFO L129 PetriNetUnfolder]: 0/674 cut-off events. [2022-07-12 10:16:52,393 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:16:52,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 674 events. 0/674 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2112 event pairs, 0 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-12 10:16:52,395 INFO L132 encePairwiseOnDemand]: 526/532 looper letters, 24 selfloop transitions, 9 changer transitions 0/443 dead transitions. [2022-07-12 10:16:52,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 443 transitions, 1034 flow [2022-07-12 10:16:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3824 transitions. [2022-07-12 10:16:52,397 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7986633249791144 [2022-07-12 10:16:52,397 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3824 transitions. [2022-07-12 10:16:52,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3824 transitions. [2022-07-12 10:16:52,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:52,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3824 transitions. [2022-07-12 10:16:52,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 424.8888888888889) internal successors, (3824), 9 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 532.0) internal successors, (5320), 10 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,402 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 532.0) internal successors, (5320), 10 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,402 INFO L186 Difference]: Start difference. First operand has 475 places, 433 transitions, 946 flow. Second operand 9 states and 3824 transitions. [2022-07-12 10:16:52,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 443 transitions, 1034 flow [2022-07-12 10:16:52,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 443 transitions, 1032 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:52,410 INFO L242 Difference]: Finished difference. Result has 474 places, 439 transitions, 994 flow [2022-07-12 10:16:52,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=994, PETRI_PLACES=474, PETRI_TRANSITIONS=439} [2022-07-12 10:16:52,411 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 1 predicate places. [2022-07-12 10:16:52,411 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 439 transitions, 994 flow [2022-07-12 10:16:52,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 423.3) internal successors, (4233), 10 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,412 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:52,412 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] [2022-07-12 10:16:52,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:52,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:52,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:52,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:52,613 INFO L85 PathProgramCache]: Analyzing trace with hash 407301857, now seen corresponding path program 1 times [2022-07-12 10:16:52,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:52,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205519842] [2022-07-12 10:16:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:52,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:52,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205519842] [2022-07-12 10:16:52,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205519842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:52,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974278697] [2022-07-12 10:16:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:52,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:52,668 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:52,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 10:16:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:52,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:52,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974278697] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:52,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:52,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:52,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106910087] [2022-07-12 10:16:52,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:52,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:52,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:52,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-07-12 10:16:52,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 439 transitions, 994 flow. Second operand has 18 states, 18 states have (on average 423.6111111111111) internal successors, (7625), 18 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:52,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-07-12 10:16:52,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:53,357 INFO L129 PetriNetUnfolder]: 0/630 cut-off events. [2022-07-12 10:16:53,357 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-07-12 10:16:53,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 630 events. 0/630 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1824 event pairs, 0 based on Foata normal form. 4/634 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-12 10:16:53,359 INFO L132 encePairwiseOnDemand]: 526/532 looper letters, 32 selfloop transitions, 21 changer transitions 0/463 dead transitions. [2022-07-12 10:16:53,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 463 transitions, 1208 flow [2022-07-12 10:16:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8898 transitions. [2022-07-12 10:16:53,364 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7964554242749732 [2022-07-12 10:16:53,365 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8898 transitions. [2022-07-12 10:16:53,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8898 transitions. [2022-07-12 10:16:53,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:53,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8898 transitions. [2022-07-12 10:16:53,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 423.7142857142857) internal successors, (8898), 21 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 532.0) internal successors, (11704), 22 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,379 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 532.0) internal successors, (11704), 22 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,379 INFO L186 Difference]: Start difference. First operand has 474 places, 439 transitions, 994 flow. Second operand 21 states and 8898 transitions. [2022-07-12 10:16:53,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 463 transitions, 1208 flow [2022-07-12 10:16:53,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 463 transitions, 1194 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:53,386 INFO L242 Difference]: Finished difference. Result has 498 places, 452 transitions, 1118 flow [2022-07-12 10:16:53,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1118, PETRI_PLACES=498, PETRI_TRANSITIONS=452} [2022-07-12 10:16:53,387 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 25 predicate places. [2022-07-12 10:16:53,387 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 452 transitions, 1118 flow [2022-07-12 10:16:53,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 423.6111111111111) internal successors, (7625), 18 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,388 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:53,388 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:53,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-12 10:16:53,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-07-12 10:16:53,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:53,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:53,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1073274307, now seen corresponding path program 1 times [2022-07-12 10:16:53,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:53,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668942192] [2022-07-12 10:16:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:53,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:53,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:53,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668942192] [2022-07-12 10:16:53,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668942192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:53,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583729618] [2022-07-12 10:16:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:53,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:53,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:53,728 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:53,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 10:16:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:53,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:54,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:54,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583729618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:54,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:54,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:54,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109330375] [2022-07-12 10:16:54,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:54,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:54,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:54,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:54,285 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-07-12 10:16:54,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 452 transitions, 1118 flow. Second operand has 34 states, 34 states have (on average 423.79411764705884) internal successors, (14409), 34 states have internal predecessors, (14409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:54,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-07-12 10:16:54,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:54,848 INFO L129 PetriNetUnfolder]: 0/542 cut-off events. [2022-07-12 10:16:54,848 INFO L130 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-07-12 10:16:54,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 542 events. 0/542 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1267 event pairs, 0 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-07-12 10:16:54,849 INFO L132 encePairwiseOnDemand]: 527/532 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-07-12 10:16:54,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 488 transitions, 1542 flow [2022-07-12 10:16:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:16:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:16:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19041 transitions. [2022-07-12 10:16:54,858 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953634085213033 [2022-07-12 10:16:54,858 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19041 transitions. [2022-07-12 10:16:54,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19041 transitions. [2022-07-12 10:16:54,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:54,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19041 transitions. [2022-07-12 10:16:54,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 423.1333333333333) internal successors, (19041), 45 states have internal predecessors, (19041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 532.0) internal successors, (24472), 46 states have internal predecessors, (24472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,889 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 532.0) internal successors, (24472), 46 states have internal predecessors, (24472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,889 INFO L186 Difference]: Start difference. First operand has 498 places, 452 transitions, 1118 flow. Second operand 45 states and 19041 transitions. [2022-07-12 10:16:54,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 488 transitions, 1542 flow [2022-07-12 10:16:54,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:54,899 INFO L242 Difference]: Finished difference. Result has 518 places, 462 transitions, 1249 flow [2022-07-12 10:16:54,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1249, PETRI_PLACES=518, PETRI_TRANSITIONS=462} [2022-07-12 10:16:54,900 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 45 predicate places. [2022-07-12 10:16:54,900 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 462 transitions, 1249 flow [2022-07-12 10:16:54,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 423.79411764705884) internal successors, (14409), 34 states have internal predecessors, (14409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,902 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:54,902 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:54,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:55,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:55,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:55,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:55,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1626722253, now seen corresponding path program 1 times [2022-07-12 10:16:55,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:55,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132108499] [2022-07-12 10:16:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:55,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:55,168 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:55,205 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:55,205 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:55,206 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:55,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:55,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-07-12 10:16:55,206 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:55,206 WARN L231 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:55,207 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-07-12 10:16:55,241 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:55,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 502 places, 565 transitions, 1415 flow [2022-07-12 10:16:55,465 INFO L129 PetriNetUnfolder]: 154/1100 cut-off events. [2022-07-12 10:16:55,465 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-12 10:16:55,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 1100 events. 154/1100 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3981 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 1151. Up to 32 conditions per place. [2022-07-12 10:16:55,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 502 places, 565 transitions, 1415 flow [2022-07-12 10:16:55,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 502 places, 565 transitions, 1415 flow [2022-07-12 10:16:55,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:55,525 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:55,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:55,529 INFO L129 PetriNetUnfolder]: 5/81 cut-off events. [2022-07-12 10:16:55,529 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:55,529 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:55,529 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] [2022-07-12 10:16:55,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:55,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:55,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1042790754, now seen corresponding path program 1 times [2022-07-12 10:16:55,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:55,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040118428] [2022-07-12 10:16:55,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:55,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:55,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:55,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040118428] [2022-07-12 10:16:55,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040118428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:55,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:55,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:55,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722404253] [2022-07-12 10:16:55,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:55,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:55,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:55,549 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 565 [2022-07-12 10:16:55,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 565 transitions, 1415 flow. Second operand has 3 states, 3 states have (on average 449.0) internal successors, (1347), 3 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:55,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 565 [2022-07-12 10:16:55,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:55,807 INFO L129 PetriNetUnfolder]: 0/908 cut-off events. [2022-07-12 10:16:55,807 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-12 10:16:55,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1169 conditions, 908 events. 0/908 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3565 event pairs, 0 based on Foata normal form. 3790/4668 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2022-07-12 10:16:55,809 INFO L132 encePairwiseOnDemand]: 468/565 looper letters, 24 selfloop transitions, 2 changer transitions 11/474 dead transitions. [2022-07-12 10:16:55,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 474 transitions, 1285 flow [2022-07-12 10:16:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1472 transitions. [2022-07-12 10:16:55,810 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8684365781710914 [2022-07-12 10:16:55,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1472 transitions. [2022-07-12 10:16:55,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1472 transitions. [2022-07-12 10:16:55,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:55,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1472 transitions. [2022-07-12 10:16:55,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 490.6666666666667) internal successors, (1472), 3 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,813 INFO L186 Difference]: Start difference. First operand has 502 places, 565 transitions, 1415 flow. Second operand 3 states and 1472 transitions. [2022-07-12 10:16:55,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 474 transitions, 1285 flow [2022-07-12 10:16:55,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 474 transitions, 1075 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:55,819 INFO L242 Difference]: Finished difference. Result has 504 places, 460 transitions, 1005 flow [2022-07-12 10:16:55,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1005, PETRI_PLACES=504, PETRI_TRANSITIONS=460} [2022-07-12 10:16:55,820 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 2 predicate places. [2022-07-12 10:16:55,820 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 460 transitions, 1005 flow [2022-07-12 10:16:55,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 449.0) internal successors, (1347), 3 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,820 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:55,820 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] [2022-07-12 10:16:55,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-07-12 10:16:55,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:55,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:55,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1743828086, now seen corresponding path program 1 times [2022-07-12 10:16:55,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:55,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058774803] [2022-07-12 10:16:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:55,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:55,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:55,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058774803] [2022-07-12 10:16:55,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058774803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:55,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564237513] [2022-07-12 10:16:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:55,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:55,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:55,866 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:55,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 10:16:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:56,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564237513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:56,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:56,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:56,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297241167] [2022-07-12 10:16:56,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:56,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:56,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:56,133 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-07-12 10:16:56,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 460 transitions, 1005 flow. Second operand has 10 states, 10 states have (on average 449.3) internal successors, (4493), 10 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:56,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-07-12 10:16:56,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:56,390 INFO L129 PetriNetUnfolder]: 0/721 cut-off events. [2022-07-12 10:16:56,391 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-12 10:16:56,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 721 events. 0/721 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2282 event pairs, 0 based on Foata normal form. 2/723 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-12 10:16:56,392 INFO L132 encePairwiseOnDemand]: 559/565 looper letters, 25 selfloop transitions, 9 changer transitions 0/470 dead transitions. [2022-07-12 10:16:56,392 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 470 transitions, 1095 flow [2022-07-12 10:16:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:56,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4059 transitions. [2022-07-12 10:16:56,394 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7982300884955752 [2022-07-12 10:16:56,394 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4059 transitions. [2022-07-12 10:16:56,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4059 transitions. [2022-07-12 10:16:56,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:56,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4059 transitions. [2022-07-12 10:16:56,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 451.0) internal successors, (4059), 9 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 565.0) internal successors, (5650), 10 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,400 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 565.0) internal successors, (5650), 10 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,400 INFO L186 Difference]: Start difference. First operand has 504 places, 460 transitions, 1005 flow. Second operand 9 states and 4059 transitions. [2022-07-12 10:16:56,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 470 transitions, 1095 flow [2022-07-12 10:16:56,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 470 transitions, 1093 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:56,409 INFO L242 Difference]: Finished difference. Result has 503 places, 466 transitions, 1053 flow [2022-07-12 10:16:56,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1053, PETRI_PLACES=503, PETRI_TRANSITIONS=466} [2022-07-12 10:16:56,410 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 1 predicate places. [2022-07-12 10:16:56,410 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 466 transitions, 1053 flow [2022-07-12 10:16:56,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 449.3) internal successors, (4493), 10 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,410 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:56,410 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] [2022-07-12 10:16:56,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-12 10:16:56,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:56,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash 435117153, now seen corresponding path program 1 times [2022-07-12 10:16:56,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:56,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522533228] [2022-07-12 10:16:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:56,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:56,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522533228] [2022-07-12 10:16:56,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522533228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:56,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137607881] [2022-07-12 10:16:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:56,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:56,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:56,665 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:56,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 10:16:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:56,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:56,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:57,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137607881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:57,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:57,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:57,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848439317] [2022-07-12 10:16:57,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:57,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:57,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:57,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:57,012 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-07-12 10:16:57,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 466 transitions, 1053 flow. Second operand has 18 states, 18 states have (on average 449.6111111111111) internal successors, (8093), 18 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:57,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-07-12 10:16:57,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:57,341 INFO L129 PetriNetUnfolder]: 0/677 cut-off events. [2022-07-12 10:16:57,341 INFO L130 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-07-12 10:16:57,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 677 events. 0/677 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2001 event pairs, 0 based on Foata normal form. 4/681 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-12 10:16:57,343 INFO L132 encePairwiseOnDemand]: 559/565 looper letters, 33 selfloop transitions, 21 changer transitions 0/490 dead transitions. [2022-07-12 10:16:57,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 490 transitions, 1269 flow [2022-07-12 10:16:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9445 transitions. [2022-07-12 10:16:57,347 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7960387694900969 [2022-07-12 10:16:57,347 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9445 transitions. [2022-07-12 10:16:57,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9445 transitions. [2022-07-12 10:16:57,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:57,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9445 transitions. [2022-07-12 10:16:57,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 449.76190476190476) internal successors, (9445), 21 states have internal predecessors, (9445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 565.0) internal successors, (12430), 22 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,400 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 565.0) internal successors, (12430), 22 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,400 INFO L186 Difference]: Start difference. First operand has 503 places, 466 transitions, 1053 flow. Second operand 21 states and 9445 transitions. [2022-07-12 10:16:57,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 490 transitions, 1269 flow [2022-07-12 10:16:57,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 490 transitions, 1255 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:57,407 INFO L242 Difference]: Finished difference. Result has 527 places, 479 transitions, 1177 flow [2022-07-12 10:16:57,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1177, PETRI_PLACES=527, PETRI_TRANSITIONS=479} [2022-07-12 10:16:57,408 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 25 predicate places. [2022-07-12 10:16:57,409 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 479 transitions, 1177 flow [2022-07-12 10:16:57,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 449.6111111111111) internal successors, (8093), 18 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,410 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:57,410 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:57,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:57,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-12 10:16:57,635 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1656795203, now seen corresponding path program 1 times [2022-07-12 10:16:57,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:57,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768475467] [2022-07-12 10:16:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:57,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:57,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768475467] [2022-07-12 10:16:57,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768475467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538629580] [2022-07-12 10:16:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:57,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:57,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:57,768 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:57,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 10:16:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:57,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:57,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538629580] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:58,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:58,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:58,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434475884] [2022-07-12 10:16:58,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:58,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:58,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:58,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:58,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:58,309 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-07-12 10:16:58,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 479 transitions, 1177 flow. Second operand has 34 states, 34 states have (on average 449.79411764705884) internal successors, (15293), 34 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:58,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-07-12 10:16:58,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:58,929 INFO L129 PetriNetUnfolder]: 0/589 cut-off events. [2022-07-12 10:16:58,929 INFO L130 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-07-12 10:16:58,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 589 events. 0/589 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1419 event pairs, 0 based on Foata normal form. 8/597 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-12 10:16:58,931 INFO L132 encePairwiseOnDemand]: 559/565 looper letters, 49 selfloop transitions, 45 changer transitions 0/530 dead transitions. [2022-07-12 10:16:58,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 530 transitions, 1681 flow [2022-07-12 10:16:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:16:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:16:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20217 transitions. [2022-07-12 10:16:58,944 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951622418879056 [2022-07-12 10:16:58,945 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20217 transitions. [2022-07-12 10:16:58,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20217 transitions. [2022-07-12 10:16:58,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:58,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20217 transitions. [2022-07-12 10:16:58,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 449.26666666666665) internal successors, (20217), 45 states have internal predecessors, (20217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 565.0) internal successors, (25990), 46 states have internal predecessors, (25990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,981 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 565.0) internal successors, (25990), 46 states have internal predecessors, (25990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,981 INFO L186 Difference]: Start difference. First operand has 527 places, 479 transitions, 1177 flow. Second operand 45 states and 20217 transitions. [2022-07-12 10:16:58,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 530 transitions, 1681 flow [2022-07-12 10:16:58,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 530 transitions, 1641 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:16:58,993 INFO L242 Difference]: Finished difference. Result has 574 places, 504 transitions, 1455 flow [2022-07-12 10:16:58,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1455, PETRI_PLACES=574, PETRI_TRANSITIONS=504} [2022-07-12 10:16:58,994 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 72 predicate places. [2022-07-12 10:16:58,994 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 504 transitions, 1455 flow [2022-07-12 10:16:58,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 449.79411764705884) internal successors, (15293), 34 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,996 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:58,996 INFO L200 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:59,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-12 10:16:59,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-12 10:16:59,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:59,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1018229807, now seen corresponding path program 1 times [2022-07-12 10:16:59,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:59,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584763493] [2022-07-12 10:16:59,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:59,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:59,233 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:59,272 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:59,273 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:59,273 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:59,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:59,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-07-12 10:16:59,273 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:59,274 WARN L231 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:59,274 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-07-12 10:16:59,316 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:59,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 531 places, 598 transitions, 1516 flow [2022-07-12 10:16:59,699 INFO L129 PetriNetUnfolder]: 164/1169 cut-off events. [2022-07-12 10:16:59,699 INFO L130 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-07-12 10:16:59,751 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1354 conditions, 1169 events. 164/1169 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4209 event pairs, 0 based on Foata normal form. 0/971 useless extension candidates. Maximal degree in co-relation 1238. Up to 34 conditions per place. [2022-07-12 10:16:59,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 531 places, 598 transitions, 1516 flow [2022-07-12 10:16:59,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 531 places, 598 transitions, 1516 flow [2022-07-12 10:16:59,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:59,771 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:16:59,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:59,775 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2022-07-12 10:16:59,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:59,776 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:59,776 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] [2022-07-12 10:16:59,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:59,777 INFO L85 PathProgramCache]: Analyzing trace with hash 434742049, now seen corresponding path program 1 times [2022-07-12 10:16:59,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:59,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736227897] [2022-07-12 10:16:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:59,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:59,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:59,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736227897] [2022-07-12 10:16:59,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736227897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:59,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:59,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:59,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740201279] [2022-07-12 10:16:59,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:59,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:59,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:59,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:59,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:59,794 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 598 [2022-07-12 10:16:59,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 598 transitions, 1516 flow. Second operand has 2 states, 2 states have (on average 481.5) internal successors, (963), 2 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:59,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 598 [2022-07-12 10:16:59,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:00,047 INFO L129 PetriNetUnfolder]: 0/988 cut-off events. [2022-07-12 10:17:00,047 INFO L130 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2022-07-12 10:17:00,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 988 events. 0/988 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3881 event pairs, 0 based on Foata normal form. 796/1750 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-12 10:17:00,049 INFO L132 encePairwiseOnDemand]: 498/598 looper letters, 16 selfloop transitions, 0 changer transitions 11/497 dead transitions. [2022-07-12 10:17:00,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1346 flow [2022-07-12 10:17:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1078 transitions. [2022-07-12 10:17:00,050 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9013377926421404 [2022-07-12 10:17:00,050 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1078 transitions. [2022-07-12 10:17:00,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1078 transitions. [2022-07-12 10:17:00,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:00,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1078 transitions. [2022-07-12 10:17:00,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 539.0) internal successors, (1078), 2 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,052 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,052 INFO L186 Difference]: Start difference. First operand has 531 places, 598 transitions, 1516 flow. Second operand 2 states and 1078 transitions. [2022-07-12 10:17:00,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1346 flow [2022-07-12 10:17:00,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 497 transitions, 1106 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:00,061 INFO L242 Difference]: Finished difference. Result has 531 places, 486 transitions, 1052 flow [2022-07-12 10:17:00,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1052, PETRI_PLACES=531, PETRI_TRANSITIONS=486} [2022-07-12 10:17:00,063 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 0 predicate places. [2022-07-12 10:17:00,063 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 486 transitions, 1052 flow [2022-07-12 10:17:00,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 481.5) internal successors, (963), 2 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,063 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:00,063 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] [2022-07-12 10:17:00,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-07-12 10:17:00,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:00,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:00,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1362209310, now seen corresponding path program 1 times [2022-07-12 10:17:00,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:00,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111792969] [2022-07-12 10:17:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:00,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:00,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111792969] [2022-07-12 10:17:00,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111792969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:00,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:00,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:00,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395997261] [2022-07-12 10:17:00,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:00,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:00,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:00,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:00,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:00,082 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 598 [2022-07-12 10:17:00,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 486 transitions, 1052 flow. Second operand has 3 states, 3 states have (on average 475.0) internal successors, (1425), 3 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:00,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 598 [2022-07-12 10:17:00,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:00,316 INFO L129 PetriNetUnfolder]: 0/790 cut-off events. [2022-07-12 10:17:00,316 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-12 10:17:00,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 790 events. 0/790 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2596 event pairs, 0 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2022-07-12 10:17:00,317 INFO L132 encePairwiseOnDemand]: 595/598 looper letters, 25 selfloop transitions, 2 changer transitions 0/490 dead transitions. [2022-07-12 10:17:00,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 490 transitions, 1114 flow [2022-07-12 10:17:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1450 transitions. [2022-07-12 10:17:00,318 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8082497212931996 [2022-07-12 10:17:00,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1450 transitions. [2022-07-12 10:17:00,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1450 transitions. [2022-07-12 10:17:00,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:00,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1450 transitions. [2022-07-12 10:17:00,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 483.3333333333333) internal successors, (1450), 3 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,320 INFO L186 Difference]: Start difference. First operand has 531 places, 486 transitions, 1052 flow. Second operand 3 states and 1450 transitions. [2022-07-12 10:17:00,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 490 transitions, 1114 flow [2022-07-12 10:17:00,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 490 transitions, 1114 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:00,327 INFO L242 Difference]: Finished difference. Result has 523 places, 487 transitions, 1064 flow [2022-07-12 10:17:00,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1064, PETRI_PLACES=523, PETRI_TRANSITIONS=487} [2022-07-12 10:17:00,328 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, -8 predicate places. [2022-07-12 10:17:00,328 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 487 transitions, 1064 flow [2022-07-12 10:17:00,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 475.0) internal successors, (1425), 3 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:00,329 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] [2022-07-12 10:17:00,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-07-12 10:17:00,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash -112851242, now seen corresponding path program 1 times [2022-07-12 10:17:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:00,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406381712] [2022-07-12 10:17:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:00,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:00,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406381712] [2022-07-12 10:17:00,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406381712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:00,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648030778] [2022-07-12 10:17:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:00,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:00,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:00,356 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:00,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 10:17:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:00,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:00,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648030778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:00,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:00,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:00,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995782487] [2022-07-12 10:17:00,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:00,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:00,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:00,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:00,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:00,648 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-12 10:17:00,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 487 transitions, 1064 flow. Second operand has 10 states, 10 states have (on average 475.3) internal successors, (4753), 10 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:00,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-12 10:17:00,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:00,920 INFO L129 PetriNetUnfolder]: 0/768 cut-off events. [2022-07-12 10:17:00,920 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-12 10:17:00,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 768 events. 0/768 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2464 event pairs, 0 based on Foata normal form. 2/770 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-12 10:17:00,922 INFO L132 encePairwiseOnDemand]: 592/598 looper letters, 26 selfloop transitions, 9 changer transitions 0/497 dead transitions. [2022-07-12 10:17:00,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1156 flow [2022-07-12 10:17:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4294 transitions. [2022-07-12 10:17:00,924 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7978446674098848 [2022-07-12 10:17:00,924 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4294 transitions. [2022-07-12 10:17:00,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4294 transitions. [2022-07-12 10:17:00,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:00,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4294 transitions. [2022-07-12 10:17:00,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 477.1111111111111) internal successors, (4294), 9 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 598.0) internal successors, (5980), 10 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,930 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 598.0) internal successors, (5980), 10 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,931 INFO L186 Difference]: Start difference. First operand has 523 places, 487 transitions, 1064 flow. Second operand 9 states and 4294 transitions. [2022-07-12 10:17:00,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1156 flow [2022-07-12 10:17:00,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 497 transitions, 1154 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:00,938 INFO L242 Difference]: Finished difference. Result has 533 places, 493 transitions, 1112 flow [2022-07-12 10:17:00,938 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1112, PETRI_PLACES=533, PETRI_TRANSITIONS=493} [2022-07-12 10:17:00,938 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 2 predicate places. [2022-07-12 10:17:00,939 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 493 transitions, 1112 flow [2022-07-12 10:17:00,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 475.3) internal successors, (4753), 10 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,939 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:00,940 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] [2022-07-12 10:17:00,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-12 10:17:01,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:01,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1846186625, now seen corresponding path program 1 times [2022-07-12 10:17:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705026392] [2022-07-12 10:17:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:01,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705026392] [2022-07-12 10:17:01,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705026392] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:01,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943747854] [2022-07-12 10:17:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:01,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:01,185 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:01,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 10:17:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:01,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943747854] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:01,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:01,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:01,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112516222] [2022-07-12 10:17:01,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:01,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:01,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:01,526 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-12 10:17:01,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 493 transitions, 1112 flow. Second operand has 18 states, 18 states have (on average 475.6111111111111) internal successors, (8561), 18 states have internal predecessors, (8561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:01,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-12 10:17:01,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:01,887 INFO L129 PetriNetUnfolder]: 0/724 cut-off events. [2022-07-12 10:17:01,887 INFO L130 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-07-12 10:17:01,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 724 events. 0/724 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2164 event pairs, 0 based on Foata normal form. 4/728 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-12 10:17:01,889 INFO L132 encePairwiseOnDemand]: 592/598 looper letters, 34 selfloop transitions, 21 changer transitions 0/517 dead transitions. [2022-07-12 10:17:01,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 517 transitions, 1330 flow [2022-07-12 10:17:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9992 transitions. [2022-07-12 10:17:01,893 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956681000159261 [2022-07-12 10:17:01,893 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9992 transitions. [2022-07-12 10:17:01,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9992 transitions. [2022-07-12 10:17:01,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:01,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9992 transitions. [2022-07-12 10:17:01,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 475.8095238095238) internal successors, (9992), 21 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 598.0) internal successors, (13156), 22 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,941 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 598.0) internal successors, (13156), 22 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,941 INFO L186 Difference]: Start difference. First operand has 533 places, 493 transitions, 1112 flow. Second operand 21 states and 9992 transitions. [2022-07-12 10:17:01,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 517 transitions, 1330 flow [2022-07-12 10:17:01,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 517 transitions, 1316 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:01,947 INFO L242 Difference]: Finished difference. Result has 557 places, 506 transitions, 1236 flow [2022-07-12 10:17:01,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1236, PETRI_PLACES=557, PETRI_TRANSITIONS=506} [2022-07-12 10:17:01,947 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 26 predicate places. [2022-07-12 10:17:01,948 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 506 transitions, 1236 flow [2022-07-12 10:17:01,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 475.6111111111111) internal successors, (8561), 18 states have internal predecessors, (8561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,948 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:01,949 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:01,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-12 10:17:02,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:02,149 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:02,150 INFO L85 PathProgramCache]: Analyzing trace with hash -778990109, now seen corresponding path program 1 times [2022-07-12 10:17:02,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:02,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925316068] [2022-07-12 10:17:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:02,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:02,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925316068] [2022-07-12 10:17:02,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925316068] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:02,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030231084] [2022-07-12 10:17:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:02,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:02,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:02,264 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:02,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 10:17:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:02,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:02,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030231084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:02,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:02,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:02,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211007731] [2022-07-12 10:17:02,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:02,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:02,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:02,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:02,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:02,811 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-12 10:17:02,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 506 transitions, 1236 flow. Second operand has 34 states, 34 states have (on average 475.79411764705884) internal successors, (16177), 34 states have internal predecessors, (16177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:02,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-12 10:17:02,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:03,421 INFO L129 PetriNetUnfolder]: 0/636 cut-off events. [2022-07-12 10:17:03,422 INFO L130 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-07-12 10:17:03,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 636 events. 0/636 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1587 event pairs, 0 based on Foata normal form. 8/644 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-07-12 10:17:03,423 INFO L132 encePairwiseOnDemand]: 592/598 looper letters, 50 selfloop transitions, 45 changer transitions 0/557 dead transitions. [2022-07-12 10:17:03,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 557 transitions, 1742 flow [2022-07-12 10:17:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21388 transitions. [2022-07-12 10:17:03,432 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7947974730583426 [2022-07-12 10:17:03,432 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21388 transitions. [2022-07-12 10:17:03,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21388 transitions. [2022-07-12 10:17:03,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:03,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21388 transitions. [2022-07-12 10:17:03,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 475.2888888888889) internal successors, (21388), 45 states have internal predecessors, (21388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 598.0) internal successors, (27508), 46 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,464 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 598.0) internal successors, (27508), 46 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,464 INFO L186 Difference]: Start difference. First operand has 557 places, 506 transitions, 1236 flow. Second operand 45 states and 21388 transitions. [2022-07-12 10:17:03,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 557 transitions, 1742 flow [2022-07-12 10:17:03,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 557 transitions, 1702 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:03,472 INFO L242 Difference]: Finished difference. Result has 604 places, 531 transitions, 1514 flow [2022-07-12 10:17:03,472 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1514, PETRI_PLACES=604, PETRI_TRANSITIONS=531} [2022-07-12 10:17:03,472 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 73 predicate places. [2022-07-12 10:17:03,473 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 531 transitions, 1514 flow [2022-07-12 10:17:03,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 475.79411764705884) internal successors, (16177), 34 states have internal predecessors, (16177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,474 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:03,474 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:03,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-12 10:17:03,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:03,675 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:03,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:03,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1064402135, now seen corresponding path program 1 times [2022-07-12 10:17:03,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:03,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343664391] [2022-07-12 10:17:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:03,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:04,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:04,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343664391] [2022-07-12 10:17:04,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343664391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:04,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178131903] [2022-07-12 10:17:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:04,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:04,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:04,008 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:04,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 10:17:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:04,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:04,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:05,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178131903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:05,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:05,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321400856] [2022-07-12 10:17:05,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:05,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:05,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:05,221 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-12 10:17:05,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 531 transitions, 1514 flow. Second operand has 66 states, 66 states have (on average 475.8939393939394) internal successors, (31409), 66 states have internal predecessors, (31409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:05,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:05,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-12 10:17:05,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:06,000 INFO L129 PetriNetUnfolder]: 0/614 cut-off events. [2022-07-12 10:17:06,000 INFO L130 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-07-12 10:17:06,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 614 events. 0/614 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1463 event pairs, 0 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-07-12 10:17:06,002 INFO L132 encePairwiseOnDemand]: 593/598 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-07-12 10:17:06,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 552 transitions, 1852 flow [2022-07-12 10:17:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 10:17:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-12 10:17:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24225 transitions. [2022-07-12 10:17:06,017 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.794314381270903 [2022-07-12 10:17:06,017 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24225 transitions. [2022-07-12 10:17:06,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24225 transitions. [2022-07-12 10:17:06,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:06,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24225 transitions. [2022-07-12 10:17:06,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 475.0) internal successors, (24225), 51 states have internal predecessors, (24225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 598.0) internal successors, (31096), 52 states have internal predecessors, (31096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,060 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 598.0) internal successors, (31096), 52 states have internal predecessors, (31096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,060 INFO L186 Difference]: Start difference. First operand has 604 places, 531 transitions, 1514 flow. Second operand 51 states and 24225 transitions. [2022-07-12 10:17:06,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 552 transitions, 1852 flow [2022-07-12 10:17:06,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:06,069 INFO L242 Difference]: Finished difference. Result has 610 places, 523 transitions, 1471 flow [2022-07-12 10:17:06,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1471, PETRI_PLACES=610, PETRI_TRANSITIONS=523} [2022-07-12 10:17:06,070 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 79 predicate places. [2022-07-12 10:17:06,070 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 523 transitions, 1471 flow [2022-07-12 10:17:06,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 475.8939393939394) internal successors, (31409), 66 states have internal predecessors, (31409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,074 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:06,075 INFO L200 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:06,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-12 10:17:06,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-07-12 10:17:06,281 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:06,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1486777266, now seen corresponding path program 1 times [2022-07-12 10:17:06,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:06,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511624985] [2022-07-12 10:17:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:06,321 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:06,376 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:06,377 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:06,377 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:06,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:06,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-07-12 10:17:06,377 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:06,378 WARN L231 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:06,378 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-07-12 10:17:06,416 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:06,420 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 560 places, 631 transitions, 1619 flow [2022-07-12 10:17:06,826 INFO L129 PetriNetUnfolder]: 174/1238 cut-off events. [2022-07-12 10:17:06,826 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-12 10:17:06,861 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 1238 events. 174/1238 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4492 event pairs, 0 based on Foata normal form. 0/1028 useless extension candidates. Maximal degree in co-relation 1326. Up to 36 conditions per place. [2022-07-12 10:17:06,861 INFO L82 GeneralOperation]: Start removeDead. Operand has 560 places, 631 transitions, 1619 flow [2022-07-12 10:17:06,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 560 places, 631 transitions, 1619 flow [2022-07-12 10:17:06,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:06,879 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:17:06,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:06,883 INFO L129 PetriNetUnfolder]: 5/79 cut-off events. [2022-07-12 10:17:06,883 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:06,883 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:06,884 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] [2022-07-12 10:17:06,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:06,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:06,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1343056606, now seen corresponding path program 1 times [2022-07-12 10:17:06,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:06,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650247008] [2022-07-12 10:17:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:06,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650247008] [2022-07-12 10:17:06,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650247008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:06,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:06,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:06,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518143275] [2022-07-12 10:17:06,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:06,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:06,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:06,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:06,900 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 631 [2022-07-12 10:17:06,901 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 631 transitions, 1619 flow. Second operand has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:06,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 631 [2022-07-12 10:17:06,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:07,216 INFO L129 PetriNetUnfolder]: 0/1024 cut-off events. [2022-07-12 10:17:07,216 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-12 10:17:07,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1024 events. 0/1024 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4045 event pairs, 0 based on Foata normal form. 4904/5894 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2022-07-12 10:17:07,218 INFO L132 encePairwiseOnDemand]: 522/631 looper letters, 26 selfloop transitions, 2 changer transitions 11/528 dead transitions. [2022-07-12 10:17:07,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 528 transitions, 1469 flow [2022-07-12 10:17:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1642 transitions. [2022-07-12 10:17:07,219 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8674062334918119 [2022-07-12 10:17:07,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1642 transitions. [2022-07-12 10:17:07,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1642 transitions. [2022-07-12 10:17:07,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:07,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1642 transitions. [2022-07-12 10:17:07,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 547.3333333333334) internal successors, (1642), 3 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,222 INFO L186 Difference]: Start difference. First operand has 560 places, 631 transitions, 1619 flow. Second operand 3 states and 1642 transitions. [2022-07-12 10:17:07,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 528 transitions, 1469 flow [2022-07-12 10:17:07,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 528 transitions, 1197 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:07,231 INFO L242 Difference]: Finished difference. Result has 562 places, 514 transitions, 1123 flow [2022-07-12 10:17:07,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1123, PETRI_PLACES=562, PETRI_TRANSITIONS=514} [2022-07-12 10:17:07,232 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 2 predicate places. [2022-07-12 10:17:07,232 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 514 transitions, 1123 flow [2022-07-12 10:17:07,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,232 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:07,233 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] [2022-07-12 10:17:07,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-07-12 10:17:07,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:07,233 INFO L85 PathProgramCache]: Analyzing trace with hash -777301866, now seen corresponding path program 1 times [2022-07-12 10:17:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:07,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214741929] [2022-07-12 10:17:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:07,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:07,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:07,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214741929] [2022-07-12 10:17:07,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214741929] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:07,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952286418] [2022-07-12 10:17:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:07,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:07,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:07,266 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:07,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 10:17:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:07,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:07,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:07,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:07,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952286418] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:07,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:07,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:07,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851343868] [2022-07-12 10:17:07,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:07,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:07,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:07,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:07,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:07,563 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-12 10:17:07,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 514 transitions, 1123 flow. Second operand has 10 states, 10 states have (on average 501.3) internal successors, (5013), 10 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:07,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-12 10:17:07,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:07,849 INFO L129 PetriNetUnfolder]: 0/815 cut-off events. [2022-07-12 10:17:07,849 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:17:07,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 815 events. 0/815 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2619 event pairs, 0 based on Foata normal form. 2/817 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-12 10:17:07,851 INFO L132 encePairwiseOnDemand]: 625/631 looper letters, 27 selfloop transitions, 9 changer transitions 0/524 dead transitions. [2022-07-12 10:17:07,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 524 transitions, 1217 flow [2022-07-12 10:17:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4529 transitions. [2022-07-12 10:17:07,854 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7974995597816517 [2022-07-12 10:17:07,854 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4529 transitions. [2022-07-12 10:17:07,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4529 transitions. [2022-07-12 10:17:07,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:07,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4529 transitions. [2022-07-12 10:17:07,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 503.22222222222223) internal successors, (4529), 9 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,859 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,860 INFO L186 Difference]: Start difference. First operand has 562 places, 514 transitions, 1123 flow. Second operand 9 states and 4529 transitions. [2022-07-12 10:17:07,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 524 transitions, 1217 flow [2022-07-12 10:17:07,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 524 transitions, 1215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:07,866 INFO L242 Difference]: Finished difference. Result has 561 places, 520 transitions, 1171 flow [2022-07-12 10:17:07,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1171, PETRI_PLACES=561, PETRI_TRANSITIONS=520} [2022-07-12 10:17:07,914 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 1 predicate places. [2022-07-12 10:17:07,914 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 520 transitions, 1171 flow [2022-07-12 10:17:07,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 501.3) internal successors, (5013), 10 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,915 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:07,915 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] [2022-07-12 10:17:07,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-12 10:17:08,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-07-12 10:17:08,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash 345542977, now seen corresponding path program 1 times [2022-07-12 10:17:08,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:08,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677651140] [2022-07-12 10:17:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:08,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:08,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677651140] [2022-07-12 10:17:08,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677651140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160314477] [2022-07-12 10:17:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:08,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:08,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:08,163 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:08,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 10:17:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:08,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:08,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:08,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:08,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160314477] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:08,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:08,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:08,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158788961] [2022-07-12 10:17:08,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:08,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:08,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:08,539 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-12 10:17:08,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 520 transitions, 1171 flow. Second operand has 18 states, 18 states have (on average 501.6111111111111) internal successors, (9029), 18 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:08,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-12 10:17:08,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:08,978 INFO L129 PetriNetUnfolder]: 0/771 cut-off events. [2022-07-12 10:17:08,978 INFO L130 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-07-12 10:17:08,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 771 events. 0/771 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2334 event pairs, 0 based on Foata normal form. 4/775 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-12 10:17:08,979 INFO L132 encePairwiseOnDemand]: 625/631 looper letters, 35 selfloop transitions, 21 changer transitions 0/544 dead transitions. [2022-07-12 10:17:08,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 544 transitions, 1391 flow [2022-07-12 10:17:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10539 transitions. [2022-07-12 10:17:08,984 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953362010414309 [2022-07-12 10:17:08,984 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10539 transitions. [2022-07-12 10:17:08,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10539 transitions. [2022-07-12 10:17:08,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:08,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10539 transitions. [2022-07-12 10:17:08,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 501.85714285714283) internal successors, (10539), 21 states have internal predecessors, (10539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 631.0) internal successors, (13882), 22 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,997 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 631.0) internal successors, (13882), 22 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,997 INFO L186 Difference]: Start difference. First operand has 561 places, 520 transitions, 1171 flow. Second operand 21 states and 10539 transitions. [2022-07-12 10:17:08,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 544 transitions, 1391 flow [2022-07-12 10:17:09,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 544 transitions, 1377 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:09,004 INFO L242 Difference]: Finished difference. Result has 585 places, 533 transitions, 1295 flow [2022-07-12 10:17:09,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1295, PETRI_PLACES=585, PETRI_TRANSITIONS=533} [2022-07-12 10:17:09,004 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 25 predicate places. [2022-07-12 10:17:09,004 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 533 transitions, 1295 flow [2022-07-12 10:17:09,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 501.6111111111111) internal successors, (9029), 18 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,005 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:09,005 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:09,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-12 10:17:09,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:09,206 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:09,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1939114333, now seen corresponding path program 1 times [2022-07-12 10:17:09,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:09,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166413073] [2022-07-12 10:17:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:09,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:09,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:09,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166413073] [2022-07-12 10:17:09,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166413073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:09,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520948098] [2022-07-12 10:17:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:09,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:09,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:09,321 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:09,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 10:17:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:09,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:09,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:09,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:09,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520948098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:09,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:09,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130109972] [2022-07-12 10:17:09,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:09,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:09,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:09,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:09,889 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-12 10:17:09,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 533 transitions, 1295 flow. Second operand has 34 states, 34 states have (on average 501.79411764705884) internal successors, (17061), 34 states have internal predecessors, (17061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:09,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-12 10:17:09,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:10,532 INFO L129 PetriNetUnfolder]: 0/683 cut-off events. [2022-07-12 10:17:10,532 INFO L130 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-07-12 10:17:10,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 683 events. 0/683 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1758 event pairs, 0 based on Foata normal form. 8/691 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-12 10:17:10,533 INFO L132 encePairwiseOnDemand]: 625/631 looper letters, 51 selfloop transitions, 45 changer transitions 0/584 dead transitions. [2022-07-12 10:17:10,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 584 transitions, 1803 flow [2022-07-12 10:17:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22559 transitions. [2022-07-12 10:17:10,582 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7944708575453425 [2022-07-12 10:17:10,582 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22559 transitions. [2022-07-12 10:17:10,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22559 transitions. [2022-07-12 10:17:10,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:10,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22559 transitions. [2022-07-12 10:17:10,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 501.31111111111113) internal successors, (22559), 45 states have internal predecessors, (22559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:10,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 631.0) internal successors, (29026), 46 states have internal predecessors, (29026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:10,616 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 631.0) internal successors, (29026), 46 states have internal predecessors, (29026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:10,616 INFO L186 Difference]: Start difference. First operand has 585 places, 533 transitions, 1295 flow. Second operand 45 states and 22559 transitions. [2022-07-12 10:17:10,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 584 transitions, 1803 flow [2022-07-12 10:17:10,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 584 transitions, 1763 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:10,623 INFO L242 Difference]: Finished difference. Result has 632 places, 558 transitions, 1573 flow [2022-07-12 10:17:10,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1573, PETRI_PLACES=632, PETRI_TRANSITIONS=558} [2022-07-12 10:17:10,624 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 72 predicate places. [2022-07-12 10:17:10,624 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 558 transitions, 1573 flow [2022-07-12 10:17:10,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 501.79411764705884) internal successors, (17061), 34 states have internal predecessors, (17061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:10,626 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:10,626 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:10,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-12 10:17:10,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:10,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:10,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1036859799, now seen corresponding path program 1 times [2022-07-12 10:17:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:10,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995296106] [2022-07-12 10:17:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:10,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:11,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:11,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995296106] [2022-07-12 10:17:11,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995296106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:11,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303822853] [2022-07-12 10:17:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:11,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:11,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:11,197 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:11,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-12 10:17:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:11,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:11,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:11,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:12,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303822853] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:12,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:12,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:12,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067218458] [2022-07-12 10:17:12,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:12,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:12,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:12,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:12,444 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-12 10:17:12,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 558 transitions, 1573 flow. Second operand has 66 states, 66 states have (on average 501.8939393939394) internal successors, (33125), 66 states have internal predecessors, (33125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:12,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:12,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-12 10:17:12,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:13,261 INFO L129 PetriNetUnfolder]: 0/650 cut-off events. [2022-07-12 10:17:13,262 INFO L130 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-07-12 10:17:13,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 650 events. 0/650 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1561 event pairs, 0 based on Foata normal form. 3/653 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-12 10:17:13,263 INFO L132 encePairwiseOnDemand]: 626/631 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-07-12 10:17:13,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 584 transitions, 1967 flow [2022-07-12 10:17:13,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-12 10:17:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-12 10:17:13,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27055 transitions. [2022-07-12 10:17:13,274 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940071608851323 [2022-07-12 10:17:13,274 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27055 transitions. [2022-07-12 10:17:13,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27055 transitions. [2022-07-12 10:17:13,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:13,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27055 transitions. [2022-07-12 10:17:13,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 501.01851851851853) internal successors, (27055), 54 states have internal predecessors, (27055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:13,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 631.0) internal successors, (34705), 55 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:13,316 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 631.0) internal successors, (34705), 55 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:13,316 INFO L186 Difference]: Start difference. First operand has 632 places, 558 transitions, 1573 flow. Second operand 54 states and 27055 transitions. [2022-07-12 10:17:13,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 584 transitions, 1967 flow [2022-07-12 10:17:13,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:13,325 INFO L242 Difference]: Finished difference. Result has 641 places, 553 transitions, 1559 flow [2022-07-12 10:17:13,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1559, PETRI_PLACES=641, PETRI_TRANSITIONS=553} [2022-07-12 10:17:13,326 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 81 predicate places. [2022-07-12 10:17:13,326 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 553 transitions, 1559 flow [2022-07-12 10:17:13,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 501.8939393939394) internal successors, (33125), 66 states have internal predecessors, (33125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:13,330 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:13,330 INFO L200 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:13,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-12 10:17:13,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:13,535 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:13,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1484304650, now seen corresponding path program 1 times [2022-07-12 10:17:13,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:13,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432788774] [2022-07-12 10:17:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:13,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:13,563 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:13,614 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:13,614 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:13,615 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:13,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:13,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-07-12 10:17:13,615 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:13,615 WARN L231 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:13,616 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-07-12 10:17:13,655 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:13,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 589 places, 664 transitions, 1724 flow [2022-07-12 10:17:13,964 INFO L129 PetriNetUnfolder]: 184/1307 cut-off events. [2022-07-12 10:17:13,965 INFO L130 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-07-12 10:17:14,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 1307 events. 184/1307 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4730 event pairs, 0 based on Foata normal form. 0/1085 useless extension candidates. Maximal degree in co-relation 1415. Up to 38 conditions per place. [2022-07-12 10:17:14,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 589 places, 664 transitions, 1724 flow [2022-07-12 10:17:14,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 664 transitions, 1724 flow [2022-07-12 10:17:14,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:14,042 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:17:14,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:14,047 INFO L129 PetriNetUnfolder]: 4/78 cut-off events. [2022-07-12 10:17:14,047 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:14,047 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:14,048 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] [2022-07-12 10:17:14,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:14,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1100248866, now seen corresponding path program 1 times [2022-07-12 10:17:14,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:14,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660148991] [2022-07-12 10:17:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:14,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:14,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:14,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660148991] [2022-07-12 10:17:14,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660148991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:14,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:14,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:14,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817659618] [2022-07-12 10:17:14,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:14,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:14,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:14,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:14,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:14,068 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 526 out of 664 [2022-07-12 10:17:14,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 664 transitions, 1724 flow. Second operand has 3 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:14,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 526 of 664 [2022-07-12 10:17:14,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:14,402 INFO L129 PetriNetUnfolder]: 0/1082 cut-off events. [2022-07-12 10:17:14,403 INFO L130 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-07-12 10:17:14,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 1082 events. 0/1082 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4318 event pairs, 0 based on Foata normal form. 5515/6561 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2022-07-12 10:17:14,405 INFO L132 encePairwiseOnDemand]: 549/664 looper letters, 27 selfloop transitions, 2 changer transitions 11/555 dead transitions. [2022-07-12 10:17:14,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 555 transitions, 1564 flow [2022-07-12 10:17:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1727 transitions. [2022-07-12 10:17:14,406 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8669678714859438 [2022-07-12 10:17:14,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1727 transitions. [2022-07-12 10:17:14,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1727 transitions. [2022-07-12 10:17:14,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:14,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1727 transitions. [2022-07-12 10:17:14,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 575.6666666666666) internal successors, (1727), 3 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 664.0) internal successors, (2656), 4 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 664.0) internal successors, (2656), 4 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,408 INFO L186 Difference]: Start difference. First operand has 589 places, 664 transitions, 1724 flow. Second operand 3 states and 1727 transitions. [2022-07-12 10:17:14,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 555 transitions, 1564 flow [2022-07-12 10:17:14,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 555 transitions, 1258 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:14,416 INFO L242 Difference]: Finished difference. Result has 591 places, 541 transitions, 1182 flow [2022-07-12 10:17:14,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1182, PETRI_PLACES=591, PETRI_TRANSITIONS=541} [2022-07-12 10:17:14,416 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 2 predicate places. [2022-07-12 10:17:14,417 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 541 transitions, 1182 flow [2022-07-12 10:17:14,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,417 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:14,417 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] [2022-07-12 10:17:14,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-07-12 10:17:14,418 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:14,418 INFO L85 PathProgramCache]: Analyzing trace with hash -249523786, now seen corresponding path program 1 times [2022-07-12 10:17:14,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:14,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965450967] [2022-07-12 10:17:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:14,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:14,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965450967] [2022-07-12 10:17:14,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965450967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389877903] [2022-07-12 10:17:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:14,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:14,448 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:14,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-12 10:17:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:14,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:14,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:14,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389877903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:14,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:14,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:14,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816430663] [2022-07-12 10:17:14,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:14,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:14,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:14,841 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-12 10:17:14,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 541 transitions, 1182 flow. Second operand has 10 states, 10 states have (on average 527.3) internal successors, (5273), 10 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:14,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-12 10:17:14,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:15,215 INFO L129 PetriNetUnfolder]: 0/862 cut-off events. [2022-07-12 10:17:15,215 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-12 10:17:15,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 862 events. 0/862 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2806 event pairs, 0 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-12 10:17:15,217 INFO L132 encePairwiseOnDemand]: 658/664 looper letters, 28 selfloop transitions, 9 changer transitions 0/551 dead transitions. [2022-07-12 10:17:15,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 551 transitions, 1278 flow [2022-07-12 10:17:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4764 transitions. [2022-07-12 10:17:15,220 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7971887550200804 [2022-07-12 10:17:15,220 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4764 transitions. [2022-07-12 10:17:15,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4764 transitions. [2022-07-12 10:17:15,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:15,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4764 transitions. [2022-07-12 10:17:15,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 529.3333333333334) internal successors, (4764), 9 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:15,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 664.0) internal successors, (6640), 10 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:15,227 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 664.0) internal successors, (6640), 10 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:15,228 INFO L186 Difference]: Start difference. First operand has 591 places, 541 transitions, 1182 flow. Second operand 9 states and 4764 transitions. [2022-07-12 10:17:15,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 551 transitions, 1278 flow [2022-07-12 10:17:15,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 551 transitions, 1276 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:15,235 INFO L242 Difference]: Finished difference. Result has 590 places, 547 transitions, 1230 flow [2022-07-12 10:17:15,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1230, PETRI_PLACES=590, PETRI_TRANSITIONS=547} [2022-07-12 10:17:15,236 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 1 predicate places. [2022-07-12 10:17:15,236 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 547 transitions, 1230 flow [2022-07-12 10:17:15,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 527.3) internal successors, (5273), 10 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:15,237 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:15,237 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] [2022-07-12 10:17:15,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:15,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-07-12 10:17:15,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:15,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash 228153505, now seen corresponding path program 1 times [2022-07-12 10:17:15,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:15,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126395625] [2022-07-12 10:17:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:15,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:15,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:15,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126395625] [2022-07-12 10:17:15,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126395625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:15,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782580520] [2022-07-12 10:17:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:15,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:15,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:15,508 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:15,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-12 10:17:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:15,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:15,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:15,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:15,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782580520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:15,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:15,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:15,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617753487] [2022-07-12 10:17:15,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:15,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:15,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:16,000 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-12 10:17:16,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 547 transitions, 1230 flow. Second operand has 18 states, 18 states have (on average 527.6111111111111) internal successors, (9497), 18 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:16,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-12 10:17:16,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:16,369 INFO L129 PetriNetUnfolder]: 0/818 cut-off events. [2022-07-12 10:17:16,369 INFO L130 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-07-12 10:17:16,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 818 events. 0/818 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2513 event pairs, 0 based on Foata normal form. 4/822 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-12 10:17:16,371 INFO L132 encePairwiseOnDemand]: 658/664 looper letters, 36 selfloop transitions, 21 changer transitions 0/571 dead transitions. [2022-07-12 10:17:16,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 571 transitions, 1452 flow [2022-07-12 10:17:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11086 transitions. [2022-07-12 10:17:16,375 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7950372920252439 [2022-07-12 10:17:16,375 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11086 transitions. [2022-07-12 10:17:16,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11086 transitions. [2022-07-12 10:17:16,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:16,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11086 transitions. [2022-07-12 10:17:16,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 527.9047619047619) internal successors, (11086), 21 states have internal predecessors, (11086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 664.0) internal successors, (14608), 22 states have internal predecessors, (14608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,389 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 664.0) internal successors, (14608), 22 states have internal predecessors, (14608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,389 INFO L186 Difference]: Start difference. First operand has 590 places, 547 transitions, 1230 flow. Second operand 21 states and 11086 transitions. [2022-07-12 10:17:16,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 571 transitions, 1452 flow [2022-07-12 10:17:16,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 571 transitions, 1438 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:16,396 INFO L242 Difference]: Finished difference. Result has 614 places, 560 transitions, 1354 flow [2022-07-12 10:17:16,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1354, PETRI_PLACES=614, PETRI_TRANSITIONS=560} [2022-07-12 10:17:16,397 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 25 predicate places. [2022-07-12 10:17:16,397 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 560 transitions, 1354 flow [2022-07-12 10:17:16,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 527.6111111111111) internal successors, (9497), 18 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,397 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:16,398 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:16,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:16,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:16,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:16,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1823577469, now seen corresponding path program 1 times [2022-07-12 10:17:16,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:16,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115959838] [2022-07-12 10:17:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:16,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:16,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:16,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115959838] [2022-07-12 10:17:16,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115959838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:16,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370864418] [2022-07-12 10:17:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:16,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:16,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:16,719 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:16,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-12 10:17:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:17,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:17,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:17,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370864418] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:17,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:17,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:17,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101865805] [2022-07-12 10:17:17,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:17,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:17,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:17,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:17,355 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-12 10:17:17,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 560 transitions, 1354 flow. Second operand has 34 states, 34 states have (on average 527.7941176470588) internal successors, (17945), 34 states have internal predecessors, (17945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:17,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:17,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-12 10:17:17,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:18,153 INFO L129 PetriNetUnfolder]: 0/730 cut-off events. [2022-07-12 10:17:18,154 INFO L130 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-07-12 10:17:18,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 730 events. 0/730 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1932 event pairs, 0 based on Foata normal form. 8/738 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-07-12 10:17:18,155 INFO L132 encePairwiseOnDemand]: 658/664 looper letters, 52 selfloop transitions, 45 changer transitions 0/611 dead transitions. [2022-07-12 10:17:18,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 611 transitions, 1864 flow [2022-07-12 10:17:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23730 transitions. [2022-07-12 10:17:18,164 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7941767068273092 [2022-07-12 10:17:18,165 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23730 transitions. [2022-07-12 10:17:18,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23730 transitions. [2022-07-12 10:17:18,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:18,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23730 transitions. [2022-07-12 10:17:18,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 527.3333333333334) internal successors, (23730), 45 states have internal predecessors, (23730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:18,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 664.0) internal successors, (30544), 46 states have internal predecessors, (30544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:18,201 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 664.0) internal successors, (30544), 46 states have internal predecessors, (30544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:18,201 INFO L186 Difference]: Start difference. First operand has 614 places, 560 transitions, 1354 flow. Second operand 45 states and 23730 transitions. [2022-07-12 10:17:18,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 611 transitions, 1864 flow [2022-07-12 10:17:18,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 611 transitions, 1824 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:18,209 INFO L242 Difference]: Finished difference. Result has 661 places, 585 transitions, 1632 flow [2022-07-12 10:17:18,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1632, PETRI_PLACES=661, PETRI_TRANSITIONS=585} [2022-07-12 10:17:18,210 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 72 predicate places. [2022-07-12 10:17:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 585 transitions, 1632 flow [2022-07-12 10:17:18,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 527.7941176470588) internal successors, (17945), 34 states have internal predecessors, (17945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:18,212 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:18,212 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:18,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-12 10:17:18,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-07-12 10:17:18,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:18,413 INFO L85 PathProgramCache]: Analyzing trace with hash 828442231, now seen corresponding path program 1 times [2022-07-12 10:17:18,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:18,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613724279] [2022-07-12 10:17:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:18,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:18,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613724279] [2022-07-12 10:17:18,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613724279] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910578184] [2022-07-12 10:17:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:18,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:18,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:18,783 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:18,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-12 10:17:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:19,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:19,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:19,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910578184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:20,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:20,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:20,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301378152] [2022-07-12 10:17:20,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:20,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:20,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:20,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:20,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:20,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-12 10:17:20,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 585 transitions, 1632 flow. Second operand has 66 states, 66 states have (on average 527.8939393939394) internal successors, (34841), 66 states have internal predecessors, (34841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:20,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-12 10:17:20,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:20,976 INFO L129 PetriNetUnfolder]: 0/686 cut-off events. [2022-07-12 10:17:20,976 INFO L130 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-07-12 10:17:20,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1158 conditions, 686 events. 0/686 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1659 event pairs, 0 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-07-12 10:17:20,977 INFO L132 encePairwiseOnDemand]: 659/664 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-07-12 10:17:20,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 616 transitions, 2082 flow [2022-07-12 10:17:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-12 10:17:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-07-12 10:17:20,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30041 transitions. [2022-07-12 10:17:20,990 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7937275417459311 [2022-07-12 10:17:20,990 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30041 transitions. [2022-07-12 10:17:20,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30041 transitions. [2022-07-12 10:17:20,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:20,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30041 transitions. [2022-07-12 10:17:21,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 527.0350877192982) internal successors, (30041), 57 states have internal predecessors, (30041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 664.0) internal successors, (38512), 58 states have internal predecessors, (38512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,043 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 664.0) internal successors, (38512), 58 states have internal predecessors, (38512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,043 INFO L186 Difference]: Start difference. First operand has 661 places, 585 transitions, 1632 flow. Second operand 57 states and 30041 transitions. [2022-07-12 10:17:21,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 616 transitions, 2082 flow [2022-07-12 10:17:21,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:21,054 INFO L242 Difference]: Finished difference. Result has 673 places, 583 transitions, 1647 flow [2022-07-12 10:17:21,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1647, PETRI_PLACES=673, PETRI_TRANSITIONS=583} [2022-07-12 10:17:21,055 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 84 predicate places. [2022-07-12 10:17:21,055 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 583 transitions, 1647 flow [2022-07-12 10:17:21,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 527.8939393939394) internal successors, (34841), 66 states have internal predecessors, (34841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,058 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:21,059 INFO L200 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:21,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:21,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:21,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash 444372635, now seen corresponding path program 1 times [2022-07-12 10:17:21,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:21,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127986981] [2022-07-12 10:17:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:21,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:21,333 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:21,384 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:21,385 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:21,385 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:21,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:21,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-07-12 10:17:21,385 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:21,386 WARN L231 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:21,386 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-07-12 10:17:21,425 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:21,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 618 places, 697 transitions, 1831 flow [2022-07-12 10:17:21,763 INFO L129 PetriNetUnfolder]: 194/1376 cut-off events. [2022-07-12 10:17:21,764 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-12 10:17:21,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 1376 events. 194/1376 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4984 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 1505. Up to 40 conditions per place. [2022-07-12 10:17:21,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 618 places, 697 transitions, 1831 flow [2022-07-12 10:17:21,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 618 places, 697 transitions, 1831 flow [2022-07-12 10:17:21,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:21,853 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:17:21,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:21,856 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-12 10:17:21,856 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:21,856 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:21,856 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] [2022-07-12 10:17:21,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:21,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1672739810, now seen corresponding path program 1 times [2022-07-12 10:17:21,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:21,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828256086] [2022-07-12 10:17:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:21,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:21,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:21,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828256086] [2022-07-12 10:17:21,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828256086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:21,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:21,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:21,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132306394] [2022-07-12 10:17:21,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:21,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:21,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:21,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:21,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:21,874 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 552 out of 697 [2022-07-12 10:17:21,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 697 transitions, 1831 flow. Second operand has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:21,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 552 of 697 [2022-07-12 10:17:21,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:22,248 INFO L129 PetriNetUnfolder]: 0/1140 cut-off events. [2022-07-12 10:17:22,248 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-12 10:17:22,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 1140 events. 0/1140 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4569 event pairs, 0 based on Foata normal form. 6162/7264 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2022-07-12 10:17:22,250 INFO L132 encePairwiseOnDemand]: 576/697 looper letters, 28 selfloop transitions, 2 changer transitions 11/582 dead transitions. [2022-07-12 10:17:22,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 582 transitions, 1661 flow [2022-07-12 10:17:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1812 transitions. [2022-07-12 10:17:22,252 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.866571018651363 [2022-07-12 10:17:22,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1812 transitions. [2022-07-12 10:17:22,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1812 transitions. [2022-07-12 10:17:22,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:22,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1812 transitions. [2022-07-12 10:17:22,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 604.0) internal successors, (1812), 3 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,255 INFO L186 Difference]: Start difference. First operand has 618 places, 697 transitions, 1831 flow. Second operand 3 states and 1812 transitions. [2022-07-12 10:17:22,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 582 transitions, 1661 flow [2022-07-12 10:17:22,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 582 transitions, 1319 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:22,266 INFO L242 Difference]: Finished difference. Result has 620 places, 568 transitions, 1241 flow [2022-07-12 10:17:22,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1241, PETRI_PLACES=620, PETRI_TRANSITIONS=568} [2022-07-12 10:17:22,267 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 2 predicate places. [2022-07-12 10:17:22,267 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 568 transitions, 1241 flow [2022-07-12 10:17:22,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,267 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:22,268 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] [2022-07-12 10:17:22,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-07-12 10:17:22,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1470482998, now seen corresponding path program 1 times [2022-07-12 10:17:22,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:22,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953002566] [2022-07-12 10:17:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:22,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:22,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953002566] [2022-07-12 10:17:22,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953002566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:22,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154192268] [2022-07-12 10:17:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:22,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:22,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:22,300 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:22,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-12 10:17:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:22,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:22,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154192268] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:22,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:22,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:22,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349483948] [2022-07-12 10:17:22,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:22,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:22,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:22,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:22,674 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-12 10:17:22,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 568 transitions, 1241 flow. Second operand has 10 states, 10 states have (on average 553.3) internal successors, (5533), 10 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:22,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-12 10:17:22,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:23,029 INFO L129 PetriNetUnfolder]: 0/909 cut-off events. [2022-07-12 10:17:23,029 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-12 10:17:23,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 909 events. 0/909 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2979 event pairs, 0 based on Foata normal form. 2/911 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-12 10:17:23,031 INFO L132 encePairwiseOnDemand]: 691/697 looper letters, 29 selfloop transitions, 9 changer transitions 0/578 dead transitions. [2022-07-12 10:17:23,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 578 transitions, 1339 flow [2022-07-12 10:17:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4999 transitions. [2022-07-12 10:17:23,033 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969073808385143 [2022-07-12 10:17:23,033 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4999 transitions. [2022-07-12 10:17:23,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4999 transitions. [2022-07-12 10:17:23,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:23,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4999 transitions. [2022-07-12 10:17:23,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 555.4444444444445) internal successors, (4999), 9 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:23,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 697.0) internal successors, (6970), 10 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:23,039 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 697.0) internal successors, (6970), 10 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:23,039 INFO L186 Difference]: Start difference. First operand has 620 places, 568 transitions, 1241 flow. Second operand 9 states and 4999 transitions. [2022-07-12 10:17:23,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 578 transitions, 1339 flow [2022-07-12 10:17:23,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 578 transitions, 1337 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:23,045 INFO L242 Difference]: Finished difference. Result has 619 places, 574 transitions, 1289 flow [2022-07-12 10:17:23,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1289, PETRI_PLACES=619, PETRI_TRANSITIONS=574} [2022-07-12 10:17:23,046 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 1 predicate places. [2022-07-12 10:17:23,046 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 574 transitions, 1289 flow [2022-07-12 10:17:23,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 553.3) internal successors, (5533), 10 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:23,047 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:23,047 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] [2022-07-12 10:17:23,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:23,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:23,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:23,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:23,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1494018209, now seen corresponding path program 1 times [2022-07-12 10:17:23,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:23,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045021245] [2022-07-12 10:17:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:23,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:23,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:23,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045021245] [2022-07-12 10:17:23,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045021245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:23,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472730048] [2022-07-12 10:17:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:23,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:23,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:23,292 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:23,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-12 10:17:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:23,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:23,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:23,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:23,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472730048] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:23,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:23,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:23,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039214006] [2022-07-12 10:17:23,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:23,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:23,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:23,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:23,710 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-12 10:17:23,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 574 transitions, 1289 flow. Second operand has 18 states, 18 states have (on average 553.6111111111111) internal successors, (9965), 18 states have internal predecessors, (9965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:23,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:23,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-12 10:17:23,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:24,120 INFO L129 PetriNetUnfolder]: 0/865 cut-off events. [2022-07-12 10:17:24,120 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-07-12 10:17:24,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 865 events. 0/865 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2685 event pairs, 0 based on Foata normal form. 4/869 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-12 10:17:24,122 INFO L132 encePairwiseOnDemand]: 691/697 looper letters, 37 selfloop transitions, 21 changer transitions 0/598 dead transitions. [2022-07-12 10:17:24,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 598 transitions, 1513 flow [2022-07-12 10:17:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11633 transitions. [2022-07-12 10:17:24,127 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.79476668716267 [2022-07-12 10:17:24,127 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11633 transitions. [2022-07-12 10:17:24,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11633 transitions. [2022-07-12 10:17:24,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:24,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11633 transitions. [2022-07-12 10:17:24,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 553.952380952381) internal successors, (11633), 21 states have internal predecessors, (11633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:24,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 697.0) internal successors, (15334), 22 states have internal predecessors, (15334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:24,145 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 697.0) internal successors, (15334), 22 states have internal predecessors, (15334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:24,145 INFO L186 Difference]: Start difference. First operand has 619 places, 574 transitions, 1289 flow. Second operand 21 states and 11633 transitions. [2022-07-12 10:17:24,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 598 transitions, 1513 flow [2022-07-12 10:17:24,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 598 transitions, 1499 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:24,156 INFO L242 Difference]: Finished difference. Result has 643 places, 587 transitions, 1413 flow [2022-07-12 10:17:24,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1413, PETRI_PLACES=643, PETRI_TRANSITIONS=587} [2022-07-12 10:17:24,157 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 25 predicate places. [2022-07-12 10:17:24,157 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 587 transitions, 1413 flow [2022-07-12 10:17:24,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 553.6111111111111) internal successors, (9965), 18 states have internal predecessors, (9965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:24,159 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:24,159 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:24,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:24,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:24,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:24,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:24,383 INFO L85 PathProgramCache]: Analyzing trace with hash -432379517, now seen corresponding path program 1 times [2022-07-12 10:17:24,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:24,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267319699] [2022-07-12 10:17:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:24,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:24,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:24,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267319699] [2022-07-12 10:17:24,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267319699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:24,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114898447] [2022-07-12 10:17:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:24,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:24,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:24,492 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:24,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-12 10:17:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:24,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:25,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114898447] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:25,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:25,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:25,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82442811] [2022-07-12 10:17:25,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:25,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:25,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:25,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:25,125 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-12 10:17:25,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 587 transitions, 1413 flow. Second operand has 34 states, 34 states have (on average 553.7941176470588) internal successors, (18829), 34 states have internal predecessors, (18829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:25,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:25,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-12 10:17:25,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:25,865 INFO L129 PetriNetUnfolder]: 0/777 cut-off events. [2022-07-12 10:17:25,866 INFO L130 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2022-07-12 10:17:25,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 777 events. 0/777 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2101 event pairs, 0 based on Foata normal form. 8/785 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-12 10:17:25,867 INFO L132 encePairwiseOnDemand]: 691/697 looper letters, 53 selfloop transitions, 45 changer transitions 0/638 dead transitions. [2022-07-12 10:17:25,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 638 transitions, 1925 flow [2022-07-12 10:17:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:25,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 24901 transitions. [2022-07-12 10:17:25,881 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7939104096923322 [2022-07-12 10:17:25,881 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 24901 transitions. [2022-07-12 10:17:25,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 24901 transitions. [2022-07-12 10:17:25,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:25,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 24901 transitions. [2022-07-12 10:17:25,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 553.3555555555556) internal successors, (24901), 45 states have internal predecessors, (24901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:25,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 697.0) internal successors, (32062), 46 states have internal predecessors, (32062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:25,928 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 697.0) internal successors, (32062), 46 states have internal predecessors, (32062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:25,928 INFO L186 Difference]: Start difference. First operand has 643 places, 587 transitions, 1413 flow. Second operand 45 states and 24901 transitions. [2022-07-12 10:17:25,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 638 transitions, 1925 flow [2022-07-12 10:17:25,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 638 transitions, 1885 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:25,939 INFO L242 Difference]: Finished difference. Result has 690 places, 612 transitions, 1691 flow [2022-07-12 10:17:25,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1691, PETRI_PLACES=690, PETRI_TRANSITIONS=612} [2022-07-12 10:17:25,940 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 72 predicate places. [2022-07-12 10:17:25,940 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 612 transitions, 1691 flow [2022-07-12 10:17:25,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 553.7941176470588) internal successors, (18829), 34 states have internal predecessors, (18829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:25,943 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:25,944 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:25,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-07-12 10:17:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:26,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash 439149431, now seen corresponding path program 1 times [2022-07-12 10:17:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107449812] [2022-07-12 10:17:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:26,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:26,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107449812] [2022-07-12 10:17:26,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107449812] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:26,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991778375] [2022-07-12 10:17:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:26,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:26,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:26,552 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:26,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-12 10:17:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:26,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:27,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:27,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991778375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:27,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:27,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:27,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39648424] [2022-07-12 10:17:27,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:27,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:27,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:27,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:27,826 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-12 10:17:27,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 612 transitions, 1691 flow. Second operand has 66 states, 66 states have (on average 553.8939393939394) internal successors, (36557), 66 states have internal predecessors, (36557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:27,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:27,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-12 10:17:27,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:28,844 INFO L129 PetriNetUnfolder]: 0/722 cut-off events. [2022-07-12 10:17:28,844 INFO L130 PetriNetUnfolder]: For 772/772 co-relation queries the response was YES. [2022-07-12 10:17:28,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 722 events. 0/722 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1757 event pairs, 0 based on Foata normal form. 5/727 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2022-07-12 10:17:28,846 INFO L132 encePairwiseOnDemand]: 692/697 looper letters, 60 selfloop transitions, 58 changer transitions 0/648 dead transitions. [2022-07-12 10:17:28,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 648 transitions, 2197 flow [2022-07-12 10:17:28,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 10:17:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-12 10:17:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 33183 transitions. [2022-07-12 10:17:28,859 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934720229555237 [2022-07-12 10:17:28,859 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 33183 transitions. [2022-07-12 10:17:28,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 33183 transitions. [2022-07-12 10:17:28,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:28,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 33183 transitions. [2022-07-12 10:17:28,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 553.05) internal successors, (33183), 60 states have internal predecessors, (33183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 697.0) internal successors, (42517), 61 states have internal predecessors, (42517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,914 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 697.0) internal successors, (42517), 61 states have internal predecessors, (42517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,914 INFO L186 Difference]: Start difference. First operand has 690 places, 612 transitions, 1691 flow. Second operand 60 states and 33183 transitions. [2022-07-12 10:17:28,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 648 transitions, 2197 flow [2022-07-12 10:17:28,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 648 transitions, 2036 flow, removed 14 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:28,923 INFO L242 Difference]: Finished difference. Result has 705 places, 613 transitions, 1735 flow [2022-07-12 10:17:28,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=1735, PETRI_PLACES=705, PETRI_TRANSITIONS=613} [2022-07-12 10:17:28,924 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 87 predicate places. [2022-07-12 10:17:28,924 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 613 transitions, 1735 flow [2022-07-12 10:17:28,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 553.8939393939394) internal successors, (36557), 66 states have internal predecessors, (36557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,928 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:28,928 INFO L200 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:28,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-07-12 10:17:29,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-07-12 10:17:29,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1902582593, now seen corresponding path program 1 times [2022-07-12 10:17:29,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:29,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317942334] [2022-07-12 10:17:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:29,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:29,158 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:29,202 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:29,203 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:29,203 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:29,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:29,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-07-12 10:17:29,203 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:29,204 WARN L231 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:29,204 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2022-07-12 10:17:29,248 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:29,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 647 places, 730 transitions, 1940 flow [2022-07-12 10:17:29,692 INFO L129 PetriNetUnfolder]: 204/1445 cut-off events. [2022-07-12 10:17:29,692 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-07-12 10:17:29,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1716 conditions, 1445 events. 204/1445 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5244 event pairs, 0 based on Foata normal form. 0/1199 useless extension candidates. Maximal degree in co-relation 1596. Up to 42 conditions per place. [2022-07-12 10:17:29,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 647 places, 730 transitions, 1940 flow [2022-07-12 10:17:29,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 647 places, 730 transitions, 1940 flow [2022-07-12 10:17:29,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:29,795 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:17:29,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:29,798 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2022-07-12 10:17:29,798 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:29,798 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:29,798 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] [2022-07-12 10:17:29,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:29,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:29,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2123599711, now seen corresponding path program 1 times [2022-07-12 10:17:29,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:29,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171727588] [2022-07-12 10:17:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:29,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:29,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:29,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171727588] [2022-07-12 10:17:29,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171727588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:29,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:29,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:29,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276089916] [2022-07-12 10:17:29,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:29,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:29,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:29,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:29,813 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 585 out of 730 [2022-07-12 10:17:29,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 730 transitions, 1940 flow. Second operand has 2 states, 2 states have (on average 585.5) internal successors, (1171), 2 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:29,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:29,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 585 of 730 [2022-07-12 10:17:29,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:30,181 INFO L129 PetriNetUnfolder]: 0/1220 cut-off events. [2022-07-12 10:17:30,181 INFO L130 PetriNetUnfolder]: For 1730/1730 co-relation queries the response was YES. [2022-07-12 10:17:30,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1220 events. 0/1220 cut-off events. For 1730/1730 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4924 event pairs, 0 based on Foata normal form. 1232/2410 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-07-12 10:17:30,183 INFO L132 encePairwiseOnDemand]: 606/730 looper letters, 20 selfloop transitions, 0 changer transitions 11/605 dead transitions. [2022-07-12 10:17:30,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 605 transitions, 1730 flow [2022-07-12 10:17:30,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1314 transitions. [2022-07-12 10:17:30,185 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-12 10:17:30,185 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1314 transitions. [2022-07-12 10:17:30,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1314 transitions. [2022-07-12 10:17:30,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:30,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1314 transitions. [2022-07-12 10:17:30,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 657.0) internal successors, (1314), 2 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 730.0) internal successors, (2190), 3 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) [2022-07-12 10:17:30,187 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 730.0) internal successors, (2190), 3 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) [2022-07-12 10:17:30,187 INFO L186 Difference]: Start difference. First operand has 647 places, 730 transitions, 1940 flow. Second operand 2 states and 1314 transitions. [2022-07-12 10:17:30,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 605 transitions, 1730 flow [2022-07-12 10:17:30,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 605 transitions, 1350 flow, removed 190 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:30,194 INFO L242 Difference]: Finished difference. Result has 647 places, 594 transitions, 1288 flow [2022-07-12 10:17:30,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1288, PETRI_PLACES=647, PETRI_TRANSITIONS=594} [2022-07-12 10:17:30,194 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 0 predicate places. [2022-07-12 10:17:30,195 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 594 transitions, 1288 flow [2022-07-12 10:17:30,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 585.5) internal successors, (1171), 2 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:30,195 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] [2022-07-12 10:17:30,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-07-12 10:17:30,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:30,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:30,196 INFO L85 PathProgramCache]: Analyzing trace with hash 374416226, now seen corresponding path program 1 times [2022-07-12 10:17:30,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:30,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184555431] [2022-07-12 10:17:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:30,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:30,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:30,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184555431] [2022-07-12 10:17:30,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184555431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:30,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:30,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:30,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675285409] [2022-07-12 10:17:30,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:30,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:30,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:30,211 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 578 out of 730 [2022-07-12 10:17:30,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 594 transitions, 1288 flow. Second operand has 3 states, 3 states have (on average 579.0) internal successors, (1737), 3 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:30,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 578 of 730 [2022-07-12 10:17:30,212 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:30,521 INFO L129 PetriNetUnfolder]: 0/978 cut-off events. [2022-07-12 10:17:30,521 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:17:30,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 978 events. 0/978 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3261 event pairs, 0 based on Foata normal form. 0/958 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2022-07-12 10:17:30,523 INFO L132 encePairwiseOnDemand]: 727/730 looper letters, 29 selfloop transitions, 2 changer transitions 0/598 dead transitions. [2022-07-12 10:17:30,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 598 transitions, 1358 flow [2022-07-12 10:17:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1766 transitions. [2022-07-12 10:17:30,524 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.806392694063927 [2022-07-12 10:17:30,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1766 transitions. [2022-07-12 10:17:30,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1766 transitions. [2022-07-12 10:17:30,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:30,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1766 transitions. [2022-07-12 10:17:30,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 588.6666666666666) internal successors, (1766), 3 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 730.0) internal successors, (2920), 4 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 730.0) internal successors, (2920), 4 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,527 INFO L186 Difference]: Start difference. First operand has 647 places, 594 transitions, 1288 flow. Second operand 3 states and 1766 transitions. [2022-07-12 10:17:30,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 598 transitions, 1358 flow [2022-07-12 10:17:30,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 598 transitions, 1358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:30,534 INFO L242 Difference]: Finished difference. Result has 639 places, 595 transitions, 1300 flow [2022-07-12 10:17:30,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1300, PETRI_PLACES=639, PETRI_TRANSITIONS=595} [2022-07-12 10:17:30,535 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, -8 predicate places. [2022-07-12 10:17:30,535 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 595 transitions, 1300 flow [2022-07-12 10:17:30,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 579.0) internal successors, (1737), 3 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,535 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:30,535 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] [2022-07-12 10:17:30,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-07-12 10:17:30,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:30,536 INFO L85 PathProgramCache]: Analyzing trace with hash 87751190, now seen corresponding path program 1 times [2022-07-12 10:17:30,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:30,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758680084] [2022-07-12 10:17:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:30,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:30,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758680084] [2022-07-12 10:17:30,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758680084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868453043] [2022-07-12 10:17:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:30,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:30,564 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:30,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-12 10:17:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:30,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:30,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:30,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:30,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868453043] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:30,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:30,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:30,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497249542] [2022-07-12 10:17:30,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:30,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:30,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:30,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:30,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-12 10:17:30,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 595 transitions, 1300 flow. Second operand has 10 states, 10 states have (on average 579.3) internal successors, (5793), 10 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:30,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-12 10:17:30,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:31,324 INFO L129 PetriNetUnfolder]: 0/956 cut-off events. [2022-07-12 10:17:31,324 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-12 10:17:31,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1223 conditions, 956 events. 0/956 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3150 event pairs, 0 based on Foata normal form. 2/958 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-12 10:17:31,326 INFO L132 encePairwiseOnDemand]: 724/730 looper letters, 30 selfloop transitions, 9 changer transitions 0/605 dead transitions. [2022-07-12 10:17:31,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 605 transitions, 1400 flow [2022-07-12 10:17:31,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5234 transitions. [2022-07-12 10:17:31,330 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7966514459665145 [2022-07-12 10:17:31,331 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5234 transitions. [2022-07-12 10:17:31,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5234 transitions. [2022-07-12 10:17:31,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:31,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5234 transitions. [2022-07-12 10:17:31,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 581.5555555555555) internal successors, (5234), 9 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:31,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 730.0) internal successors, (7300), 10 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:31,339 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 730.0) internal successors, (7300), 10 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:31,339 INFO L186 Difference]: Start difference. First operand has 639 places, 595 transitions, 1300 flow. Second operand 9 states and 5234 transitions. [2022-07-12 10:17:31,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 605 transitions, 1400 flow [2022-07-12 10:17:31,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 605 transitions, 1398 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:31,346 INFO L242 Difference]: Finished difference. Result has 649 places, 601 transitions, 1348 flow [2022-07-12 10:17:31,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1348, PETRI_PLACES=649, PETRI_TRANSITIONS=601} [2022-07-12 10:17:31,347 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 2 predicate places. [2022-07-12 10:17:31,347 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 601 transitions, 1348 flow [2022-07-12 10:17:31,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 579.3) internal successors, (5793), 10 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:31,348 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:31,348 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] [2022-07-12 10:17:31,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-12 10:17:31,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:31,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:31,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:31,549 INFO L85 PathProgramCache]: Analyzing trace with hash -151830207, now seen corresponding path program 1 times [2022-07-12 10:17:31,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:31,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169336711] [2022-07-12 10:17:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:31,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:31,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169336711] [2022-07-12 10:17:31,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169336711] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:31,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83226881] [2022-07-12 10:17:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:31,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:31,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:31,595 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:31,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-12 10:17:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:31,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:31,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:32,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83226881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:32,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:32,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375607848] [2022-07-12 10:17:32,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:32,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:32,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:32,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:32,046 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-12 10:17:32,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 601 transitions, 1348 flow. Second operand has 18 states, 18 states have (on average 579.6111111111111) internal successors, (10433), 18 states have internal predecessors, (10433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:32,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:32,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-12 10:17:32,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:32,629 INFO L129 PetriNetUnfolder]: 0/912 cut-off events. [2022-07-12 10:17:32,629 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-12 10:17:32,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 912 events. 0/912 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2858 event pairs, 0 based on Foata normal form. 4/916 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-12 10:17:32,631 INFO L132 encePairwiseOnDemand]: 724/730 looper letters, 38 selfloop transitions, 21 changer transitions 0/625 dead transitions. [2022-07-12 10:17:32,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 625 transitions, 1574 flow [2022-07-12 10:17:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12180 transitions. [2022-07-12 10:17:32,637 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945205479452054 [2022-07-12 10:17:32,637 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12180 transitions. [2022-07-12 10:17:32,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12180 transitions. [2022-07-12 10:17:32,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:32,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12180 transitions. [2022-07-12 10:17:32,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 580.0) internal successors, (12180), 21 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:32,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 730.0) internal successors, (16060), 22 states have internal predecessors, (16060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:32,652 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 730.0) internal successors, (16060), 22 states have internal predecessors, (16060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:32,652 INFO L186 Difference]: Start difference. First operand has 649 places, 601 transitions, 1348 flow. Second operand 21 states and 12180 transitions. [2022-07-12 10:17:32,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 625 transitions, 1574 flow [2022-07-12 10:17:32,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 625 transitions, 1560 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:32,659 INFO L242 Difference]: Finished difference. Result has 673 places, 614 transitions, 1472 flow [2022-07-12 10:17:32,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1472, PETRI_PLACES=673, PETRI_TRANSITIONS=614} [2022-07-12 10:17:32,660 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 26 predicate places. [2022-07-12 10:17:32,660 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 614 transitions, 1472 flow [2022-07-12 10:17:32,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 579.6111111111111) internal successors, (10433), 18 states have internal predecessors, (10433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:32,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:32,661 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:32,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-12 10:17:32,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-07-12 10:17:32,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:32,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:32,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2060487773, now seen corresponding path program 1 times [2022-07-12 10:17:32,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:32,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375765713] [2022-07-12 10:17:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:32,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:32,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:32,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375765713] [2022-07-12 10:17:32,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375765713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:32,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477872688] [2022-07-12 10:17:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:32,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:32,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:32,968 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:32,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-12 10:17:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:33,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:33,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:33,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:33,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477872688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:33,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:33,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:33,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577080098] [2022-07-12 10:17:33,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:33,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:33,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:33,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:33,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:33,616 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-12 10:17:33,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 614 transitions, 1472 flow. Second operand has 34 states, 34 states have (on average 579.7941176470588) internal successors, (19713), 34 states have internal predecessors, (19713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:33,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:33,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-12 10:17:33,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:34,341 INFO L129 PetriNetUnfolder]: 0/824 cut-off events. [2022-07-12 10:17:34,342 INFO L130 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2022-07-12 10:17:34,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 824 events. 0/824 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2268 event pairs, 0 based on Foata normal form. 8/832 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-07-12 10:17:34,343 INFO L132 encePairwiseOnDemand]: 724/730 looper letters, 54 selfloop transitions, 45 changer transitions 0/665 dead transitions. [2022-07-12 10:17:34,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 665 transitions, 1986 flow [2022-07-12 10:17:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 26072 transitions. [2022-07-12 10:17:34,353 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7936681887366819 [2022-07-12 10:17:34,353 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 26072 transitions. [2022-07-12 10:17:34,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 26072 transitions. [2022-07-12 10:17:34,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:34,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 26072 transitions. [2022-07-12 10:17:34,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 579.3777777777777) internal successors, (26072), 45 states have internal predecessors, (26072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 730.0) internal successors, (33580), 46 states have internal predecessors, (33580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,392 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 730.0) internal successors, (33580), 46 states have internal predecessors, (33580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,392 INFO L186 Difference]: Start difference. First operand has 673 places, 614 transitions, 1472 flow. Second operand 45 states and 26072 transitions. [2022-07-12 10:17:34,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 665 transitions, 1986 flow [2022-07-12 10:17:34,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 665 transitions, 1946 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:34,400 INFO L242 Difference]: Finished difference. Result has 720 places, 639 transitions, 1750 flow [2022-07-12 10:17:34,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1750, PETRI_PLACES=720, PETRI_TRANSITIONS=639} [2022-07-12 10:17:34,401 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 73 predicate places. [2022-07-12 10:17:34,401 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 639 transitions, 1750 flow [2022-07-12 10:17:34,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 579.7941176470588) internal successors, (19713), 34 states have internal predecessors, (19713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,402 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:34,403 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:34,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-12 10:17:34,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-07-12 10:17:34,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:34,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:34,603 INFO L85 PathProgramCache]: Analyzing trace with hash -131018601, now seen corresponding path program 1 times [2022-07-12 10:17:34,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:34,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086780227] [2022-07-12 10:17:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:34,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:34,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:34,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086780227] [2022-07-12 10:17:34,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086780227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:34,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855472928] [2022-07-12 10:17:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:34,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:34,921 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:34,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-12 10:17:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:35,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:35,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:35,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:36,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855472928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:36,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:36,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:36,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304046331] [2022-07-12 10:17:36,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:36,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:36,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:36,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:36,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:36,336 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-12 10:17:36,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 639 transitions, 1750 flow. Second operand has 66 states, 66 states have (on average 579.8939393939394) internal successors, (38273), 66 states have internal predecessors, (38273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:36,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:36,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-12 10:17:36,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:37,411 INFO L129 PetriNetUnfolder]: 0/758 cut-off events. [2022-07-12 10:17:37,411 INFO L130 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2022-07-12 10:17:37,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 758 events. 0/758 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1855 event pairs, 0 based on Foata normal form. 6/764 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-12 10:17:37,412 INFO L132 encePairwiseOnDemand]: 725/730 looper letters, 63 selfloop transitions, 61 changer transitions 0/680 dead transitions. [2022-07-12 10:17:37,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 680 transitions, 2312 flow [2022-07-12 10:17:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 10:17:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-12 10:17:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 36481 transitions. [2022-07-12 10:17:37,426 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.793237660360948 [2022-07-12 10:17:37,426 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 36481 transitions. [2022-07-12 10:17:37,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 36481 transitions. [2022-07-12 10:17:37,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:37,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 36481 transitions. [2022-07-12 10:17:37,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 579.063492063492) internal successors, (36481), 63 states have internal predecessors, (36481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:37,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 730.0) internal successors, (46720), 64 states have internal predecessors, (46720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:37,485 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 730.0) internal successors, (46720), 64 states have internal predecessors, (46720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:37,485 INFO L186 Difference]: Start difference. First operand has 720 places, 639 transitions, 1750 flow. Second operand 63 states and 36481 transitions. [2022-07-12 10:17:37,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 680 transitions, 2312 flow [2022-07-12 10:17:37,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 680 transitions, 2143 flow, removed 15 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:37,495 INFO L242 Difference]: Finished difference. Result has 738 places, 643 transitions, 1823 flow [2022-07-12 10:17:37,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1823, PETRI_PLACES=738, PETRI_TRANSITIONS=643} [2022-07-12 10:17:37,496 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 91 predicate places. [2022-07-12 10:17:37,496 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 643 transitions, 1823 flow [2022-07-12 10:17:37,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 579.8939393939394) internal successors, (38273), 66 states have internal predecessors, (38273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:37,499 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:37,499 INFO L200 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:37,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-12 10:17:37,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-12 10:17:37,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:37,701 INFO L85 PathProgramCache]: Analyzing trace with hash -988310136, now seen corresponding path program 1 times [2022-07-12 10:17:37,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:37,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821584992] [2022-07-12 10:17:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:37,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:37,729 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:37,819 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:37,819 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:37,820 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:37,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:37,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-07-12 10:17:37,820 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:37,820 WARN L231 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:37,821 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2022-07-12 10:17:37,865 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:37,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 676 places, 763 transitions, 2051 flow [2022-07-12 10:17:38,294 INFO L129 PetriNetUnfolder]: 214/1514 cut-off events. [2022-07-12 10:17:38,294 INFO L130 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-07-12 10:17:38,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 1514 events. 214/1514 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5512 event pairs, 0 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 1688. Up to 44 conditions per place. [2022-07-12 10:17:38,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 676 places, 763 transitions, 2051 flow [2022-07-12 10:17:38,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 676 places, 763 transitions, 2051 flow [2022-07-12 10:17:38,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:38,404 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:17:38,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:38,408 INFO L129 PetriNetUnfolder]: 5/77 cut-off events. [2022-07-12 10:17:38,408 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:38,408 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:38,409 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] [2022-07-12 10:17:38,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash -997770527, now seen corresponding path program 1 times [2022-07-12 10:17:38,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:38,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206880779] [2022-07-12 10:17:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:38,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:38,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:38,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206880779] [2022-07-12 10:17:38,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206880779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:38,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:38,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:38,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695461742] [2022-07-12 10:17:38,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:38,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:38,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:38,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:38,426 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 611 out of 763 [2022-07-12 10:17:38,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 763 transitions, 2051 flow. Second operand has 2 states, 2 states have (on average 611.5) internal successors, (1223), 2 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:38,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:38,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 611 of 763 [2022-07-12 10:17:38,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:38,820 INFO L129 PetriNetUnfolder]: 0/1278 cut-off events. [2022-07-12 10:17:38,820 INFO L130 PetriNetUnfolder]: For 1981/1981 co-relation queries the response was YES. [2022-07-12 10:17:38,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 1278 events. 0/1278 cut-off events. For 1981/1981 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5176 event pairs, 0 based on Foata normal form. 1356/2590 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2022-07-12 10:17:38,822 INFO L132 encePairwiseOnDemand]: 633/763 looper letters, 21 selfloop transitions, 0 changer transitions 11/632 dead transitions. [2022-07-12 10:17:38,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 632 transitions, 1831 flow [2022-07-12 10:17:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1373 transitions. [2022-07-12 10:17:38,824 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8997378768020969 [2022-07-12 10:17:38,824 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1373 transitions. [2022-07-12 10:17:38,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1373 transitions. [2022-07-12 10:17:38,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:38,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1373 transitions. [2022-07-12 10:17:38,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 686.5) internal successors, (1373), 2 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:38,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 763.0) internal successors, (2289), 3 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:38,827 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 763.0) internal successors, (2289), 3 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:38,827 INFO L186 Difference]: Start difference. First operand has 676 places, 763 transitions, 2051 flow. Second operand 2 states and 1373 transitions. [2022-07-12 10:17:38,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 632 transitions, 1831 flow [2022-07-12 10:17:38,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 632 transitions, 1411 flow, removed 210 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:38,835 INFO L242 Difference]: Finished difference. Result has 676 places, 621 transitions, 1347 flow [2022-07-12 10:17:38,835 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1347, PETRI_PLACES=676, PETRI_TRANSITIONS=621} [2022-07-12 10:17:38,836 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 0 predicate places. [2022-07-12 10:17:38,836 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 621 transitions, 1347 flow [2022-07-12 10:17:38,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 611.5) internal successors, (1223), 2 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:38,836 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:38,836 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] [2022-07-12 10:17:38,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-07-12 10:17:38,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:38,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1500245410, now seen corresponding path program 1 times [2022-07-12 10:17:38,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:38,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747024252] [2022-07-12 10:17:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:38,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:38,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:38,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747024252] [2022-07-12 10:17:38,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747024252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:38,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:38,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787373419] [2022-07-12 10:17:38,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:38,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:38,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:38,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:38,860 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 604 out of 763 [2022-07-12 10:17:38,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 621 transitions, 1347 flow. Second operand has 3 states, 3 states have (on average 605.0) internal successors, (1815), 3 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:38,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:38,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 604 of 763 [2022-07-12 10:17:38,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:39,264 INFO L129 PetriNetUnfolder]: 0/1025 cut-off events. [2022-07-12 10:17:39,264 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-12 10:17:39,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 1025 events. 0/1025 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3431 event pairs, 0 based on Foata normal form. 0/1004 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2022-07-12 10:17:39,266 INFO L132 encePairwiseOnDemand]: 760/763 looper letters, 30 selfloop transitions, 2 changer transitions 0/625 dead transitions. [2022-07-12 10:17:39,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 625 transitions, 1419 flow [2022-07-12 10:17:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1845 transitions. [2022-07-12 10:17:39,268 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8060288335517694 [2022-07-12 10:17:39,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1845 transitions. [2022-07-12 10:17:39,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1845 transitions. [2022-07-12 10:17:39,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:39,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1845 transitions. [2022-07-12 10:17:39,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 615.0) internal successors, (1845), 3 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:39,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:39,271 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:39,271 INFO L186 Difference]: Start difference. First operand has 676 places, 621 transitions, 1347 flow. Second operand 3 states and 1845 transitions. [2022-07-12 10:17:39,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 625 transitions, 1419 flow [2022-07-12 10:17:39,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 625 transitions, 1419 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:39,277 INFO L242 Difference]: Finished difference. Result has 668 places, 622 transitions, 1359 flow [2022-07-12 10:17:39,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1359, PETRI_PLACES=668, PETRI_TRANSITIONS=622} [2022-07-12 10:17:39,277 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, -8 predicate places. [2022-07-12 10:17:39,277 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 622 transitions, 1359 flow [2022-07-12 10:17:39,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 605.0) internal successors, (1815), 3 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:39,278 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:39,278 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] [2022-07-12 10:17:39,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-07-12 10:17:39,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:39,278 INFO L85 PathProgramCache]: Analyzing trace with hash -102751914, now seen corresponding path program 1 times [2022-07-12 10:17:39,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:39,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047573492] [2022-07-12 10:17:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:39,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:39,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:39,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047573492] [2022-07-12 10:17:39,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047573492] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:39,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378073058] [2022-07-12 10:17:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:39,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:39,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:39,304 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:39,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-12 10:17:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:39,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:39,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:39,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:39,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378073058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:39,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:39,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463287125] [2022-07-12 10:17:39,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:39,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:39,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-12 10:17:39,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 622 transitions, 1359 flow. Second operand has 10 states, 10 states have (on average 605.3) internal successors, (6053), 10 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:39,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:39,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-12 10:17:39,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:40,221 INFO L129 PetriNetUnfolder]: 0/1003 cut-off events. [2022-07-12 10:17:40,221 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-12 10:17:40,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 1003 events. 0/1003 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3319 event pairs, 0 based on Foata normal form. 2/1005 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-12 10:17:40,223 INFO L132 encePairwiseOnDemand]: 757/763 looper letters, 31 selfloop transitions, 9 changer transitions 0/632 dead transitions. [2022-07-12 10:17:40,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 632 transitions, 1461 flow [2022-07-12 10:17:40,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5469 transitions. [2022-07-12 10:17:40,226 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7964176496286588 [2022-07-12 10:17:40,226 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5469 transitions. [2022-07-12 10:17:40,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5469 transitions. [2022-07-12 10:17:40,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:40,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5469 transitions. [2022-07-12 10:17:40,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 607.6666666666666) internal successors, (5469), 9 states have internal predecessors, (5469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:40,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 763.0) internal successors, (7630), 10 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:40,233 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 763.0) internal successors, (7630), 10 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:40,233 INFO L186 Difference]: Start difference. First operand has 668 places, 622 transitions, 1359 flow. Second operand 9 states and 5469 transitions. [2022-07-12 10:17:40,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 632 transitions, 1461 flow [2022-07-12 10:17:40,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 632 transitions, 1459 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:40,240 INFO L242 Difference]: Finished difference. Result has 678 places, 628 transitions, 1407 flow [2022-07-12 10:17:40,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1407, PETRI_PLACES=678, PETRI_TRANSITIONS=628} [2022-07-12 10:17:40,241 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 2 predicate places. [2022-07-12 10:17:40,241 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 628 transitions, 1407 flow [2022-07-12 10:17:40,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 605.3) internal successors, (6053), 10 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:40,241 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:40,241 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] [2022-07-12 10:17:40,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-12 10:17:40,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:40,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash -414424447, now seen corresponding path program 1 times [2022-07-12 10:17:40,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:40,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372851359] [2022-07-12 10:17:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:40,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:40,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372851359] [2022-07-12 10:17:40,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372851359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:40,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312584649] [2022-07-12 10:17:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:40,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:40,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:40,492 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:40,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-12 10:17:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:40,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:40,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:40,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:40,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312584649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:40,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:40,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:40,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801637334] [2022-07-12 10:17:40,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:40,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:40,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:40,962 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-12 10:17:40,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 628 transitions, 1407 flow. Second operand has 18 states, 18 states have (on average 605.6111111111111) internal successors, (10901), 18 states have internal predecessors, (10901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:40,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:40,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-12 10:17:40,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:41,551 INFO L129 PetriNetUnfolder]: 0/959 cut-off events. [2022-07-12 10:17:41,551 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-07-12 10:17:41,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 959 events. 0/959 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3013 event pairs, 0 based on Foata normal form. 4/963 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-12 10:17:41,554 INFO L132 encePairwiseOnDemand]: 757/763 looper letters, 39 selfloop transitions, 21 changer transitions 0/652 dead transitions. [2022-07-12 10:17:41,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 652 transitions, 1635 flow [2022-07-12 10:17:41,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:41,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12727 transitions. [2022-07-12 10:17:41,559 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7942956999313486 [2022-07-12 10:17:41,559 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12727 transitions. [2022-07-12 10:17:41,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12727 transitions. [2022-07-12 10:17:41,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:41,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12727 transitions. [2022-07-12 10:17:41,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 606.047619047619) internal successors, (12727), 21 states have internal predecessors, (12727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:41,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 763.0) internal successors, (16786), 22 states have internal predecessors, (16786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:41,578 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 763.0) internal successors, (16786), 22 states have internal predecessors, (16786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:41,578 INFO L186 Difference]: Start difference. First operand has 678 places, 628 transitions, 1407 flow. Second operand 21 states and 12727 transitions. [2022-07-12 10:17:41,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 652 transitions, 1635 flow [2022-07-12 10:17:41,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 652 transitions, 1621 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:41,586 INFO L242 Difference]: Finished difference. Result has 702 places, 641 transitions, 1531 flow [2022-07-12 10:17:41,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1531, PETRI_PLACES=702, PETRI_TRANSITIONS=641} [2022-07-12 10:17:41,586 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 26 predicate places. [2022-07-12 10:17:41,586 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 641 transitions, 1531 flow [2022-07-12 10:17:41,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 605.6111111111111) internal successors, (10901), 18 states have internal predecessors, (10901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:41,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:41,588 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:41,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-07-12 10:17:41,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:41,789 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:41,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1882032355, now seen corresponding path program 1 times [2022-07-12 10:17:41,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:41,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503736461] [2022-07-12 10:17:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:41,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:41,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:41,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503736461] [2022-07-12 10:17:41,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503736461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:41,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071510368] [2022-07-12 10:17:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:41,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:41,907 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:41,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-12 10:17:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:42,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:42,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:42,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:42,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071510368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:42,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:42,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:42,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564620983] [2022-07-12 10:17:42,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:42,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:42,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:42,623 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-12 10:17:42,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 641 transitions, 1531 flow. Second operand has 34 states, 34 states have (on average 605.7941176470588) internal successors, (20597), 34 states have internal predecessors, (20597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:42,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:42,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-12 10:17:42,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:43,395 INFO L129 PetriNetUnfolder]: 0/871 cut-off events. [2022-07-12 10:17:43,395 INFO L130 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2022-07-12 10:17:43,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 871 events. 0/871 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2445 event pairs, 0 based on Foata normal form. 8/879 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-12 10:17:43,397 INFO L132 encePairwiseOnDemand]: 757/763 looper letters, 55 selfloop transitions, 45 changer transitions 0/692 dead transitions. [2022-07-12 10:17:43,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 692 transitions, 2047 flow [2022-07-12 10:17:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:43,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 27243 transitions. [2022-07-12 10:17:43,407 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934469200524247 [2022-07-12 10:17:43,407 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 27243 transitions. [2022-07-12 10:17:43,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 27243 transitions. [2022-07-12 10:17:43,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:43,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 27243 transitions. [2022-07-12 10:17:43,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 605.4) internal successors, (27243), 45 states have internal predecessors, (27243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:43,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 763.0) internal successors, (35098), 46 states have internal predecessors, (35098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:43,450 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 763.0) internal successors, (35098), 46 states have internal predecessors, (35098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:43,450 INFO L186 Difference]: Start difference. First operand has 702 places, 641 transitions, 1531 flow. Second operand 45 states and 27243 transitions. [2022-07-12 10:17:43,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 692 transitions, 2047 flow [2022-07-12 10:17:43,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 692 transitions, 2007 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:43,459 INFO L242 Difference]: Finished difference. Result has 749 places, 666 transitions, 1809 flow [2022-07-12 10:17:43,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1809, PETRI_PLACES=749, PETRI_TRANSITIONS=666} [2022-07-12 10:17:43,459 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 73 predicate places. [2022-07-12 10:17:43,459 INFO L495 AbstractCegarLoop]: Abstraction has has 749 places, 666 transitions, 1809 flow [2022-07-12 10:17:43,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 605.7941176470588) internal successors, (20597), 34 states have internal predecessors, (20597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:43,461 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:43,461 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:43,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-07-12 10:17:43,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-07-12 10:17:43,663 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash -882061865, now seen corresponding path program 1 times [2022-07-12 10:17:43,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:43,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154673059] [2022-07-12 10:17:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:43,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:43,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154673059] [2022-07-12 10:17:43,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154673059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:43,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517820549] [2022-07-12 10:17:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:43,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:44,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:44,001 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:44,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-12 10:17:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:44,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:44,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:45,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517820549] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:45,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:45,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:45,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167500796] [2022-07-12 10:17:45,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:45,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:45,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:45,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:45,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-12 10:17:45,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 666 transitions, 1809 flow. Second operand has 66 states, 66 states have (on average 605.8939393939394) internal successors, (39989), 66 states have internal predecessors, (39989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:45,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:45,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-12 10:17:45,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:46,558 INFO L129 PetriNetUnfolder]: 0/794 cut-off events. [2022-07-12 10:17:46,558 INFO L130 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2022-07-12 10:17:46,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 794 events. 0/794 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1953 event pairs, 0 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2022-07-12 10:17:46,560 INFO L132 encePairwiseOnDemand]: 758/763 looper letters, 66 selfloop transitions, 64 changer transitions 0/712 dead transitions. [2022-07-12 10:17:46,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 712 transitions, 2427 flow [2022-07-12 10:17:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-12 10:17:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-12 10:17:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 39935 transitions. [2022-07-12 10:17:46,576 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930219627467334 [2022-07-12 10:17:46,576 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 39935 transitions. [2022-07-12 10:17:46,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 39935 transitions. [2022-07-12 10:17:46,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:46,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 39935 transitions. [2022-07-12 10:17:46,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 605.0757575757576) internal successors, (39935), 66 states have internal predecessors, (39935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:46,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 763.0) internal successors, (51121), 67 states have internal predecessors, (51121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:46,639 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 763.0) internal successors, (51121), 67 states have internal predecessors, (51121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:46,640 INFO L186 Difference]: Start difference. First operand has 749 places, 666 transitions, 1809 flow. Second operand 66 states and 39935 transitions. [2022-07-12 10:17:46,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 712 transitions, 2427 flow [2022-07-12 10:17:46,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 712 transitions, 2250 flow, removed 16 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:46,650 INFO L242 Difference]: Finished difference. Result has 770 places, 673 transitions, 1911 flow [2022-07-12 10:17:46,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1911, PETRI_PLACES=770, PETRI_TRANSITIONS=673} [2022-07-12 10:17:46,651 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 94 predicate places. [2022-07-12 10:17:46,651 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 673 transitions, 1911 flow [2022-07-12 10:17:46,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 605.8939393939394) internal successors, (39989), 66 states have internal predecessors, (39989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:46,654 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:46,655 INFO L200 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:46,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:46,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-07-12 10:17:46,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1428775408, now seen corresponding path program 1 times [2022-07-12 10:17:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:46,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321873295] [2022-07-12 10:17:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:46,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:46,886 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:46,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:46,938 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:46,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:46,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:46,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-07-12 10:17:46,939 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:46,939 WARN L231 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:46,939 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2022-07-12 10:17:46,988 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:46,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 705 places, 796 transitions, 2164 flow [2022-07-12 10:17:47,477 INFO L129 PetriNetUnfolder]: 224/1583 cut-off events. [2022-07-12 10:17:47,477 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-12 10:17:47,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 1583 events. 224/1583 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5794 event pairs, 0 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 1781. Up to 46 conditions per place. [2022-07-12 10:17:47,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 705 places, 796 transitions, 2164 flow [2022-07-12 10:17:47,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 705 places, 796 transitions, 2164 flow [2022-07-12 10:17:47,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:47,621 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:17:47,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:47,625 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2022-07-12 10:17:47,626 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:47,626 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:47,626 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] [2022-07-12 10:17:47,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:47,626 INFO L85 PathProgramCache]: Analyzing trace with hash 755260066, now seen corresponding path program 1 times [2022-07-12 10:17:47,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359328983] [2022-07-12 10:17:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:47,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:47,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:47,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359328983] [2022-07-12 10:17:47,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359328983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:47,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:47,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:47,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521859306] [2022-07-12 10:17:47,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:47,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:47,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:47,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:47,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:47,643 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 630 out of 796 [2022-07-12 10:17:47,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 796 transitions, 2164 flow. Second operand has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:47,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:47,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 630 of 796 [2022-07-12 10:17:47,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:48,132 INFO L129 PetriNetUnfolder]: 0/1314 cut-off events. [2022-07-12 10:17:48,132 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-12 10:17:48,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1771 conditions, 1314 events. 0/1314 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5322 event pairs, 0 based on Foata normal form. 8318/9588 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2022-07-12 10:17:48,135 INFO L132 encePairwiseOnDemand]: 657/796 looper letters, 31 selfloop transitions, 2 changer transitions 11/663 dead transitions. [2022-07-12 10:17:48,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 663 transitions, 1964 flow [2022-07-12 10:17:48,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2067 transitions. [2022-07-12 10:17:48,137 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8655778894472361 [2022-07-12 10:17:48,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2067 transitions. [2022-07-12 10:17:48,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2067 transitions. [2022-07-12 10:17:48,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:48,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2067 transitions. [2022-07-12 10:17:48,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 689.0) internal successors, (2067), 3 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:48,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:48,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:48,140 INFO L186 Difference]: Start difference. First operand has 705 places, 796 transitions, 2164 flow. Second operand 3 states and 2067 transitions. [2022-07-12 10:17:48,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 663 transitions, 1964 flow [2022-07-12 10:17:48,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 663 transitions, 1502 flow, removed 231 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:48,148 INFO L242 Difference]: Finished difference. Result has 707 places, 649 transitions, 1418 flow [2022-07-12 10:17:48,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1418, PETRI_PLACES=707, PETRI_TRANSITIONS=649} [2022-07-12 10:17:48,149 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 2 predicate places. [2022-07-12 10:17:48,149 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 649 transitions, 1418 flow [2022-07-12 10:17:48,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:48,149 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:48,149 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] [2022-07-12 10:17:48,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-07-12 10:17:48,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:48,150 INFO L85 PathProgramCache]: Analyzing trace with hash 898973686, now seen corresponding path program 1 times [2022-07-12 10:17:48,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:48,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493018685] [2022-07-12 10:17:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:48,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:48,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:48,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493018685] [2022-07-12 10:17:48,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493018685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:48,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634998463] [2022-07-12 10:17:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:48,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:48,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:48,175 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:48,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-12 10:17:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:48,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:48,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:48,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634998463] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:48,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:48,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:48,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012706641] [2022-07-12 10:17:48,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:48,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:48,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:48,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:48,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:48,624 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-12 10:17:48,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 649 transitions, 1418 flow. Second operand has 10 states, 10 states have (on average 631.3) internal successors, (6313), 10 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:48,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:48,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-12 10:17:48,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:49,142 INFO L129 PetriNetUnfolder]: 0/1050 cut-off events. [2022-07-12 10:17:49,143 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-12 10:17:49,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1342 conditions, 1050 events. 0/1050 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3492 event pairs, 0 based on Foata normal form. 2/1052 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-12 10:17:49,144 INFO L132 encePairwiseOnDemand]: 790/796 looper letters, 32 selfloop transitions, 9 changer transitions 0/659 dead transitions. [2022-07-12 10:17:49,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 659 transitions, 1522 flow [2022-07-12 10:17:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5704 transitions. [2022-07-12 10:17:49,148 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7962032384142937 [2022-07-12 10:17:49,148 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5704 transitions. [2022-07-12 10:17:49,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5704 transitions. [2022-07-12 10:17:49,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:49,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5704 transitions. [2022-07-12 10:17:49,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 633.7777777777778) internal successors, (5704), 9 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:49,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 796.0) internal successors, (7960), 10 states have internal predecessors, (7960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:49,155 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 796.0) internal successors, (7960), 10 states have internal predecessors, (7960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:49,155 INFO L186 Difference]: Start difference. First operand has 707 places, 649 transitions, 1418 flow. Second operand 9 states and 5704 transitions. [2022-07-12 10:17:49,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 659 transitions, 1522 flow [2022-07-12 10:17:49,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 659 transitions, 1520 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:49,162 INFO L242 Difference]: Finished difference. Result has 706 places, 655 transitions, 1466 flow [2022-07-12 10:17:49,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1466, PETRI_PLACES=706, PETRI_TRANSITIONS=655} [2022-07-12 10:17:49,162 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 1 predicate places. [2022-07-12 10:17:49,163 INFO L495 AbstractCegarLoop]: Abstraction has has 706 places, 655 transitions, 1466 flow [2022-07-12 10:17:49,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 631.3) internal successors, (6313), 10 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:49,163 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:49,163 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] [2022-07-12 10:17:49,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-12 10:17:49,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-07-12 10:17:49,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash 706235489, now seen corresponding path program 1 times [2022-07-12 10:17:49,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:49,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376810661] [2022-07-12 10:17:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:49,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:49,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376810661] [2022-07-12 10:17:49,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376810661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302933942] [2022-07-12 10:17:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:49,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:49,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:49,414 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:49,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-12 10:17:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:49,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:49,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:49,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:49,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302933942] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:49,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:49,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:49,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228586528] [2022-07-12 10:17:49,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:49,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:49,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:49,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:49,943 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-12 10:17:49,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 706 places, 655 transitions, 1466 flow. Second operand has 18 states, 18 states have (on average 631.6111111111111) internal successors, (11369), 18 states have internal predecessors, (11369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:49,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:49,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-12 10:17:49,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:50,483 INFO L129 PetriNetUnfolder]: 0/1006 cut-off events. [2022-07-12 10:17:50,483 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-07-12 10:17:50,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 1006 events. 0/1006 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3184 event pairs, 0 based on Foata normal form. 4/1010 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-12 10:17:50,486 INFO L132 encePairwiseOnDemand]: 790/796 looper letters, 40 selfloop transitions, 21 changer transitions 0/679 dead transitions. [2022-07-12 10:17:50,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 679 transitions, 1696 flow [2022-07-12 10:17:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13274 transitions. [2022-07-12 10:17:50,492 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940894950945202 [2022-07-12 10:17:50,492 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13274 transitions. [2022-07-12 10:17:50,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13274 transitions. [2022-07-12 10:17:50,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:50,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13274 transitions. [2022-07-12 10:17:50,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 632.0952380952381) internal successors, (13274), 21 states have internal predecessors, (13274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:50,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 796.0) internal successors, (17512), 22 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:50,512 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 796.0) internal successors, (17512), 22 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:50,512 INFO L186 Difference]: Start difference. First operand has 706 places, 655 transitions, 1466 flow. Second operand 21 states and 13274 transitions. [2022-07-12 10:17:50,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 679 transitions, 1696 flow [2022-07-12 10:17:50,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 679 transitions, 1682 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:50,520 INFO L242 Difference]: Finished difference. Result has 730 places, 668 transitions, 1590 flow [2022-07-12 10:17:50,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1590, PETRI_PLACES=730, PETRI_TRANSITIONS=668} [2022-07-12 10:17:50,521 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 25 predicate places. [2022-07-12 10:17:50,521 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 668 transitions, 1590 flow [2022-07-12 10:17:50,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 631.6111111111111) internal successors, (11369), 18 states have internal predecessors, (11369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:50,522 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:50,522 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:50,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:50,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:50,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1489721021, now seen corresponding path program 1 times [2022-07-12 10:17:50,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:50,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028503344] [2022-07-12 10:17:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:50,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:50,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:50,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028503344] [2022-07-12 10:17:50,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028503344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:50,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226645896] [2022-07-12 10:17:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:50,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:50,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:50,832 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:50,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-12 10:17:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:51,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:51,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:51,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:51,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226645896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:51,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:51,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:51,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109392123] [2022-07-12 10:17:51,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:51,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:51,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:51,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:51,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:51,616 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-12 10:17:51,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 668 transitions, 1590 flow. Second operand has 34 states, 34 states have (on average 631.7941176470588) internal successors, (21481), 34 states have internal predecessors, (21481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:51,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:51,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-12 10:17:51,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:52,474 INFO L129 PetriNetUnfolder]: 0/918 cut-off events. [2022-07-12 10:17:52,474 INFO L130 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-07-12 10:17:52,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 918 events. 0/918 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2606 event pairs, 0 based on Foata normal form. 8/926 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2022-07-12 10:17:52,477 INFO L132 encePairwiseOnDemand]: 790/796 looper letters, 56 selfloop transitions, 45 changer transitions 0/719 dead transitions. [2022-07-12 10:17:52,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 719 transitions, 2108 flow [2022-07-12 10:17:52,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 28414 transitions. [2022-07-12 10:17:52,493 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932439977666108 [2022-07-12 10:17:52,494 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 28414 transitions. [2022-07-12 10:17:52,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 28414 transitions. [2022-07-12 10:17:52,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:52,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 28414 transitions. [2022-07-12 10:17:52,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 631.4222222222222) internal successors, (28414), 45 states have internal predecessors, (28414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:52,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 796.0) internal successors, (36616), 46 states have internal predecessors, (36616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:52,545 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 796.0) internal successors, (36616), 46 states have internal predecessors, (36616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:52,546 INFO L186 Difference]: Start difference. First operand has 730 places, 668 transitions, 1590 flow. Second operand 45 states and 28414 transitions. [2022-07-12 10:17:52,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 719 transitions, 2108 flow [2022-07-12 10:17:52,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 719 transitions, 2068 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:52,572 INFO L242 Difference]: Finished difference. Result has 777 places, 693 transitions, 1868 flow [2022-07-12 10:17:52,573 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1868, PETRI_PLACES=777, PETRI_TRANSITIONS=693} [2022-07-12 10:17:52,573 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 72 predicate places. [2022-07-12 10:17:52,574 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 693 transitions, 1868 flow [2022-07-12 10:17:52,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 631.7941176470588) internal successors, (21481), 34 states have internal predecessors, (21481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:52,577 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:52,577 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:52,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:52,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-07-12 10:17:52,791 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:52,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:52,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1813980361, now seen corresponding path program 1 times [2022-07-12 10:17:52,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:52,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783038188] [2022-07-12 10:17:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:52,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:53,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783038188] [2022-07-12 10:17:53,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783038188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:53,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843954853] [2022-07-12 10:17:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:53,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:53,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:53,186 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:53,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-12 10:17:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:53,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:53,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:53,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:54,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843954853] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:54,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:54,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:54,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142418501] [2022-07-12 10:17:54,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:54,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:54,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:54,526 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-12 10:17:54,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 693 transitions, 1868 flow. Second operand has 66 states, 66 states have (on average 631.8939393939394) internal successors, (41705), 66 states have internal predecessors, (41705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:54,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:54,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-12 10:17:54,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:55,807 INFO L129 PetriNetUnfolder]: 0/830 cut-off events. [2022-07-12 10:17:55,808 INFO L130 PetriNetUnfolder]: For 1135/1135 co-relation queries the response was YES. [2022-07-12 10:17:55,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 830 events. 0/830 cut-off events. For 1135/1135 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2051 event pairs, 0 based on Foata normal form. 8/838 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2022-07-12 10:17:55,809 INFO L132 encePairwiseOnDemand]: 791/796 looper letters, 69 selfloop transitions, 67 changer transitions 0/744 dead transitions. [2022-07-12 10:17:55,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 744 transitions, 2542 flow [2022-07-12 10:17:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-12 10:17:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-12 10:17:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 43545 transitions. [2022-07-12 10:17:55,826 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928228097006773 [2022-07-12 10:17:55,826 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 43545 transitions. [2022-07-12 10:17:55,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 43545 transitions. [2022-07-12 10:17:55,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:55,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 43545 transitions. [2022-07-12 10:17:55,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 631.0869565217391) internal successors, (43545), 69 states have internal predecessors, (43545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:55,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 796.0) internal successors, (55720), 70 states have internal predecessors, (55720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:55,897 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 796.0) internal successors, (55720), 70 states have internal predecessors, (55720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:55,898 INFO L186 Difference]: Start difference. First operand has 777 places, 693 transitions, 1868 flow. Second operand 69 states and 43545 transitions. [2022-07-12 10:17:55,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 744 transitions, 2542 flow [2022-07-12 10:17:55,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 744 transitions, 2357 flow, removed 17 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:55,907 INFO L242 Difference]: Finished difference. Result has 801 places, 703 transitions, 1999 flow [2022-07-12 10:17:55,908 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1999, PETRI_PLACES=801, PETRI_TRANSITIONS=703} [2022-07-12 10:17:55,908 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 96 predicate places. [2022-07-12 10:17:55,908 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 703 transitions, 1999 flow [2022-07-12 10:17:55,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 631.8939393939394) internal successors, (41705), 66 states have internal predecessors, (41705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:55,913 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:55,913 INFO L200 CegarLoopForPetriNet]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:55,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:56,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-07-12 10:17:56,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:56,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash -780882567, now seen corresponding path program 1 times [2022-07-12 10:17:56,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:56,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852668211] [2022-07-12 10:17:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:56,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:56,163 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:56,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:56,216 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:56,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:56,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:56,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-07-12 10:17:56,217 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:56,218 WARN L231 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:56,218 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2022-07-12 10:17:56,270 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:56,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 734 places, 829 transitions, 2279 flow [2022-07-12 10:17:56,843 INFO L129 PetriNetUnfolder]: 234/1652 cut-off events. [2022-07-12 10:17:56,843 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-12 10:17:56,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 1652 events. 234/1652 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6067 event pairs, 0 based on Foata normal form. 0/1370 useless extension candidates. Maximal degree in co-relation 1875. Up to 48 conditions per place. [2022-07-12 10:17:56,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 734 places, 829 transitions, 2279 flow [2022-07-12 10:17:56,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 734 places, 829 transitions, 2279 flow [2022-07-12 10:17:56,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:56,922 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:17:56,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:56,926 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-12 10:17:56,926 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:56,926 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:56,926 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] [2022-07-12 10:17:56,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:56,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1860539806, now seen corresponding path program 1 times [2022-07-12 10:17:56,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:56,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523202682] [2022-07-12 10:17:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:56,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:56,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:56,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523202682] [2022-07-12 10:17:56,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523202682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:56,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:56,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:56,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534155068] [2022-07-12 10:17:56,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:56,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:56,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:56,948 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 656 out of 829 [2022-07-12 10:17:56,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 829 transitions, 2279 flow. Second operand has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:56,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:56,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 656 of 829 [2022-07-12 10:17:56,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:57,470 INFO L129 PetriNetUnfolder]: 0/1372 cut-off events. [2022-07-12 10:17:57,470 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-12 10:17:57,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 1372 events. 0/1372 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5536 event pairs, 0 based on Foata normal form. 9110/10436 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2022-07-12 10:17:57,473 INFO L132 encePairwiseOnDemand]: 684/829 looper letters, 32 selfloop transitions, 2 changer transitions 11/690 dead transitions. [2022-07-12 10:17:57,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 690 transitions, 2069 flow [2022-07-12 10:17:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2152 transitions. [2022-07-12 10:17:57,475 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8652995577000402 [2022-07-12 10:17:57,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2152 transitions. [2022-07-12 10:17:57,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2152 transitions. [2022-07-12 10:17:57,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:57,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2152 transitions. [2022-07-12 10:17:57,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 717.3333333333334) internal successors, (2152), 3 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:57,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 829.0) internal successors, (3316), 4 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:57,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 829.0) internal successors, (3316), 4 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:57,478 INFO L186 Difference]: Start difference. First operand has 734 places, 829 transitions, 2279 flow. Second operand 3 states and 2152 transitions. [2022-07-12 10:17:57,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 690 transitions, 2069 flow [2022-07-12 10:17:57,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 690 transitions, 1563 flow, removed 253 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:57,487 INFO L242 Difference]: Finished difference. Result has 736 places, 676 transitions, 1477 flow [2022-07-12 10:17:57,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1477, PETRI_PLACES=736, PETRI_TRANSITIONS=676} [2022-07-12 10:17:57,488 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 2 predicate places. [2022-07-12 10:17:57,488 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 676 transitions, 1477 flow [2022-07-12 10:17:57,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:57,488 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:57,488 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] [2022-07-12 10:17:57,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-07-12 10:17:57,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:57,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:57,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1202039306, now seen corresponding path program 1 times [2022-07-12 10:17:57,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:57,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707708863] [2022-07-12 10:17:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:57,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:57,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707708863] [2022-07-12 10:17:57,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707708863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479380118] [2022-07-12 10:17:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:57,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:57,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:57,516 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:57,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-12 10:17:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:57,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:57,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:57,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479380118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:57,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:57,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:57,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909344578] [2022-07-12 10:17:57,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:57,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:57,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:57,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:57,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:57,990 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-12 10:17:57,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 676 transitions, 1477 flow. Second operand has 10 states, 10 states have (on average 657.3) internal successors, (6573), 10 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:57,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:57,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-12 10:17:57,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:58,481 INFO L129 PetriNetUnfolder]: 0/1097 cut-off events. [2022-07-12 10:17:58,481 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-07-12 10:17:58,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 1097 events. 0/1097 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3642 event pairs, 0 based on Foata normal form. 2/1099 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-12 10:17:58,484 INFO L132 encePairwiseOnDemand]: 823/829 looper letters, 33 selfloop transitions, 9 changer transitions 0/686 dead transitions. [2022-07-12 10:17:58,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 686 transitions, 1583 flow [2022-07-12 10:17:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5939 transitions. [2022-07-12 10:17:58,487 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7960058973327973 [2022-07-12 10:17:58,487 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5939 transitions. [2022-07-12 10:17:58,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5939 transitions. [2022-07-12 10:17:58,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:58,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5939 transitions. [2022-07-12 10:17:58,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 659.8888888888889) internal successors, (5939), 9 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:58,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 829.0) internal successors, (8290), 10 states have internal predecessors, (8290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:58,495 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 829.0) internal successors, (8290), 10 states have internal predecessors, (8290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:58,495 INFO L186 Difference]: Start difference. First operand has 736 places, 676 transitions, 1477 flow. Second operand 9 states and 5939 transitions. [2022-07-12 10:17:58,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 686 transitions, 1583 flow [2022-07-12 10:17:58,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 686 transitions, 1581 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:58,502 INFO L242 Difference]: Finished difference. Result has 735 places, 682 transitions, 1525 flow [2022-07-12 10:17:58,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1525, PETRI_PLACES=735, PETRI_TRANSITIONS=682} [2022-07-12 10:17:58,503 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 1 predicate places. [2022-07-12 10:17:58,503 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 682 transitions, 1525 flow [2022-07-12 10:17:58,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 657.3) internal successors, (6573), 10 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:58,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:58,504 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] [2022-07-12 10:17:58,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-07-12 10:17:58,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-07-12 10:17:58,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1084817695, now seen corresponding path program 1 times [2022-07-12 10:17:58,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:58,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510808880] [2022-07-12 10:17:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:58,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:58,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:58,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510808880] [2022-07-12 10:17:58,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510808880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:58,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697166726] [2022-07-12 10:17:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:58,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:58,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:58,750 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:58,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-12 10:17:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:59,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:59,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697166726] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:59,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:59,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:59,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957347686] [2022-07-12 10:17:59,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:59,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:59,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:59,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:59,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:59,286 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-12 10:17:59,291 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 682 transitions, 1525 flow. Second operand has 18 states, 18 states have (on average 657.6111111111111) internal successors, (11837), 18 states have internal predecessors, (11837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:59,291 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:59,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-12 10:17:59,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:59,902 INFO L129 PetriNetUnfolder]: 0/1053 cut-off events. [2022-07-12 10:17:59,902 INFO L130 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-07-12 10:17:59,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 1053 events. 0/1053 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3371 event pairs, 0 based on Foata normal form. 4/1057 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-12 10:17:59,904 INFO L132 encePairwiseOnDemand]: 823/829 looper letters, 41 selfloop transitions, 21 changer transitions 0/706 dead transitions. [2022-07-12 10:17:59,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 706 transitions, 1757 flow [2022-07-12 10:17:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13821 transitions. [2022-07-12 10:17:59,910 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7938997070480786 [2022-07-12 10:17:59,910 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13821 transitions. [2022-07-12 10:17:59,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13821 transitions. [2022-07-12 10:17:59,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:59,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13821 transitions. [2022-07-12 10:17:59,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 658.1428571428571) internal successors, (13821), 21 states have internal predecessors, (13821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:59,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 829.0) internal successors, (18238), 22 states have internal predecessors, (18238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:59,929 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 829.0) internal successors, (18238), 22 states have internal predecessors, (18238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:59,929 INFO L186 Difference]: Start difference. First operand has 735 places, 682 transitions, 1525 flow. Second operand 21 states and 13821 transitions. [2022-07-12 10:17:59,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 706 transitions, 1757 flow [2022-07-12 10:17:59,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 754 places, 706 transitions, 1743 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:59,937 INFO L242 Difference]: Finished difference. Result has 759 places, 695 transitions, 1649 flow [2022-07-12 10:17:59,938 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1649, PETRI_PLACES=759, PETRI_TRANSITIONS=695} [2022-07-12 10:17:59,938 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 25 predicate places. [2022-07-12 10:17:59,938 INFO L495 AbstractCegarLoop]: Abstraction has has 759 places, 695 transitions, 1649 flow [2022-07-12 10:17:59,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 657.6111111111111) internal successors, (11837), 18 states have internal predecessors, (11837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:59,939 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:59,939 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:59,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-07-12 10:18:00,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:00,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash 709153987, now seen corresponding path program 1 times [2022-07-12 10:18:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:00,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551583042] [2022-07-12 10:18:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:00,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:00,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551583042] [2022-07-12 10:18:00,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551583042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:00,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99206139] [2022-07-12 10:18:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:00,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:00,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:00,243 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:00,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-12 10:18:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:00,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:00,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:00,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:00,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99206139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:00,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:00,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:00,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74136235] [2022-07-12 10:18:00,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:00,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:00,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:00,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:00,988 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-12 10:18:00,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 695 transitions, 1649 flow. Second operand has 34 states, 34 states have (on average 657.7941176470588) internal successors, (22365), 34 states have internal predecessors, (22365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:00,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:00,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-12 10:18:00,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:01,881 INFO L129 PetriNetUnfolder]: 0/965 cut-off events. [2022-07-12 10:18:01,881 INFO L130 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-07-12 10:18:01,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1550 conditions, 965 events. 0/965 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2778 event pairs, 0 based on Foata normal form. 8/973 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-12 10:18:01,884 INFO L132 encePairwiseOnDemand]: 823/829 looper letters, 57 selfloop transitions, 45 changer transitions 0/746 dead transitions. [2022-07-12 10:18:01,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 746 transitions, 2169 flow [2022-07-12 10:18:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 29585 transitions. [2022-07-12 10:18:01,898 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930572309341911 [2022-07-12 10:18:01,898 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 29585 transitions. [2022-07-12 10:18:01,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 29585 transitions. [2022-07-12 10:18:01,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:01,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 29585 transitions. [2022-07-12 10:18:01,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 657.4444444444445) internal successors, (29585), 45 states have internal predecessors, (29585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:01,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 829.0) internal successors, (38134), 46 states have internal predecessors, (38134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:01,950 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 829.0) internal successors, (38134), 46 states have internal predecessors, (38134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:01,950 INFO L186 Difference]: Start difference. First operand has 759 places, 695 transitions, 1649 flow. Second operand 45 states and 29585 transitions. [2022-07-12 10:18:01,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 746 transitions, 2169 flow [2022-07-12 10:18:01,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 746 transitions, 2129 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:01,961 INFO L242 Difference]: Finished difference. Result has 806 places, 720 transitions, 1927 flow [2022-07-12 10:18:01,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1927, PETRI_PLACES=806, PETRI_TRANSITIONS=720} [2022-07-12 10:18:01,962 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 72 predicate places. [2022-07-12 10:18:01,962 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 720 transitions, 1927 flow [2022-07-12 10:18:01,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 657.7941176470588) internal successors, (22365), 34 states have internal predecessors, (22365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:01,964 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:01,964 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:01,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-07-12 10:18:02,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-07-12 10:18:02,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1368193207, now seen corresponding path program 1 times [2022-07-12 10:18:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:02,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663616069] [2022-07-12 10:18:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:02,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:02,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663616069] [2022-07-12 10:18:02,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663616069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174990698] [2022-07-12 10:18:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:02,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:02,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:02,506 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:02,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-12 10:18:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:02,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:02,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:03,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:03,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174990698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:03,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:03,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:03,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757198398] [2022-07-12 10:18:03,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:03,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:03,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:03,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:03,904 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-12 10:18:03,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 720 transitions, 1927 flow. Second operand has 66 states, 66 states have (on average 657.8939393939394) internal successors, (43421), 66 states have internal predecessors, (43421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:03,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-12 10:18:03,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:05,222 INFO L129 PetriNetUnfolder]: 0/866 cut-off events. [2022-07-12 10:18:05,222 INFO L130 PetriNetUnfolder]: For 1256/1256 co-relation queries the response was YES. [2022-07-12 10:18:05,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 866 events. 0/866 cut-off events. For 1256/1256 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2149 event pairs, 0 based on Foata normal form. 9/875 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-12 10:18:05,224 INFO L132 encePairwiseOnDemand]: 824/829 looper letters, 72 selfloop transitions, 70 changer transitions 0/776 dead transitions. [2022-07-12 10:18:05,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 776 transitions, 2657 flow [2022-07-12 10:18:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-12 10:18:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-12 10:18:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 47311 transitions. [2022-07-12 10:18:05,242 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926383862752983 [2022-07-12 10:18:05,243 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 47311 transitions. [2022-07-12 10:18:05,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 47311 transitions. [2022-07-12 10:18:05,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:05,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 47311 transitions. [2022-07-12 10:18:05,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 657.0972222222222) internal successors, (47311), 72 states have internal predecessors, (47311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:05,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 829.0) internal successors, (60517), 73 states have internal predecessors, (60517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:05,323 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 829.0) internal successors, (60517), 73 states have internal predecessors, (60517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:05,323 INFO L186 Difference]: Start difference. First operand has 806 places, 720 transitions, 1927 flow. Second operand 72 states and 47311 transitions. [2022-07-12 10:18:05,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 776 transitions, 2657 flow [2022-07-12 10:18:05,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 776 transitions, 2464 flow, removed 18 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:05,338 INFO L242 Difference]: Finished difference. Result has 833 places, 733 transitions, 2087 flow [2022-07-12 10:18:05,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2087, PETRI_PLACES=833, PETRI_TRANSITIONS=733} [2022-07-12 10:18:05,339 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 99 predicate places. [2022-07-12 10:18:05,339 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 733 transitions, 2087 flow [2022-07-12 10:18:05,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 657.8939393939394) internal successors, (43421), 66 states have internal predecessors, (43421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:05,345 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:05,345 INFO L200 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:05,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:05,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:05,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash -136700829, now seen corresponding path program 1 times [2022-07-12 10:18:05,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:05,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378293154] [2022-07-12 10:18:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:05,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:05,595 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:05,653 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:05,654 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:05,654 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:05,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:05,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-07-12 10:18:05,654 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:18:05,655 WARN L231 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:05,655 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2022-07-12 10:18:05,713 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:05,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 763 places, 862 transitions, 2396 flow [2022-07-12 10:18:06,272 INFO L129 PetriNetUnfolder]: 244/1721 cut-off events. [2022-07-12 10:18:06,272 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-12 10:18:06,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 1721 events. 244/1721 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6344 event pairs, 0 based on Foata normal form. 0/1427 useless extension candidates. Maximal degree in co-relation 1970. Up to 50 conditions per place. [2022-07-12 10:18:06,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 763 places, 862 transitions, 2396 flow [2022-07-12 10:18:06,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 763 places, 862 transitions, 2396 flow [2022-07-12 10:18:06,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:06,451 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:18:06,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:06,454 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2022-07-12 10:18:06,454 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:06,454 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:06,454 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] [2022-07-12 10:18:06,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2052186910, now seen corresponding path program 1 times [2022-07-12 10:18:06,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:06,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159873310] [2022-07-12 10:18:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:06,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159873310] [2022-07-12 10:18:06,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159873310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:06,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:06,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813912361] [2022-07-12 10:18:06,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:06,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:06,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:06,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:06,473 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 682 out of 862 [2022-07-12 10:18:06,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 862 transitions, 2396 flow. Second operand has 3 states, 3 states have (on average 683.0) internal successors, (2049), 3 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:06,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:06,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 682 of 862 [2022-07-12 10:18:06,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:07,068 INFO L129 PetriNetUnfolder]: 0/1430 cut-off events. [2022-07-12 10:18:07,068 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-12 10:18:07,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1952 conditions, 1430 events. 0/1430 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5801 event pairs, 0 based on Foata normal form. 9937/11319 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2022-07-12 10:18:07,071 INFO L132 encePairwiseOnDemand]: 711/862 looper letters, 33 selfloop transitions, 2 changer transitions 11/717 dead transitions. [2022-07-12 10:18:07,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 717 transitions, 2176 flow [2022-07-12 10:18:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2237 transitions. [2022-07-12 10:18:07,075 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8650425367362722 [2022-07-12 10:18:07,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2237 transitions. [2022-07-12 10:18:07,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2237 transitions. [2022-07-12 10:18:07,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:07,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2237 transitions. [2022-07-12 10:18:07,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 745.6666666666666) internal successors, (2237), 3 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:07,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 862.0) internal successors, (3448), 4 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:07,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 862.0) internal successors, (3448), 4 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:07,078 INFO L186 Difference]: Start difference. First operand has 763 places, 862 transitions, 2396 flow. Second operand 3 states and 2237 transitions. [2022-07-12 10:18:07,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 717 transitions, 2176 flow [2022-07-12 10:18:07,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 717 transitions, 1624 flow, removed 276 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:07,088 INFO L242 Difference]: Finished difference. Result has 765 places, 703 transitions, 1536 flow [2022-07-12 10:18:07,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1536, PETRI_PLACES=765, PETRI_TRANSITIONS=703} [2022-07-12 10:18:07,089 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 2 predicate places. [2022-07-12 10:18:07,089 INFO L495 AbstractCegarLoop]: Abstraction has has 765 places, 703 transitions, 1536 flow [2022-07-12 10:18:07,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 683.0) internal successors, (2049), 3 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:07,090 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:07,090 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] [2022-07-12 10:18:07,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-07-12 10:18:07,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2110823594, now seen corresponding path program 1 times [2022-07-12 10:18:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:07,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267017208] [2022-07-12 10:18:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:07,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:07,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:07,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267017208] [2022-07-12 10:18:07,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267017208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:07,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098019144] [2022-07-12 10:18:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:07,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:07,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:07,117 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:07,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-12 10:18:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:07,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:07,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:07,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098019144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:07,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:07,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595324330] [2022-07-12 10:18:07,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:07,612 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-12 10:18:07,614 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 703 transitions, 1536 flow. Second operand has 10 states, 10 states have (on average 683.3) internal successors, (6833), 10 states have internal predecessors, (6833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:07,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:07,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-12 10:18:07,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:08,150 INFO L129 PetriNetUnfolder]: 0/1144 cut-off events. [2022-07-12 10:18:08,150 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-12 10:18:08,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 1144 events. 0/1144 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3834 event pairs, 0 based on Foata normal form. 2/1146 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-12 10:18:08,152 INFO L132 encePairwiseOnDemand]: 856/862 looper letters, 34 selfloop transitions, 9 changer transitions 0/713 dead transitions. [2022-07-12 10:18:08,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 713 transitions, 1644 flow [2022-07-12 10:18:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6174 transitions. [2022-07-12 10:18:08,155 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7958236658932715 [2022-07-12 10:18:08,155 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6174 transitions. [2022-07-12 10:18:08,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6174 transitions. [2022-07-12 10:18:08,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:08,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6174 transitions. [2022-07-12 10:18:08,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 686.0) internal successors, (6174), 9 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 862.0) internal successors, (8620), 10 states have internal predecessors, (8620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,163 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 862.0) internal successors, (8620), 10 states have internal predecessors, (8620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,163 INFO L186 Difference]: Start difference. First operand has 765 places, 703 transitions, 1536 flow. Second operand 9 states and 6174 transitions. [2022-07-12 10:18:08,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 713 transitions, 1644 flow [2022-07-12 10:18:08,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 713 transitions, 1642 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:08,172 INFO L242 Difference]: Finished difference. Result has 764 places, 709 transitions, 1584 flow [2022-07-12 10:18:08,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1584, PETRI_PLACES=764, PETRI_TRANSITIONS=709} [2022-07-12 10:18:08,173 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 1 predicate places. [2022-07-12 10:18:08,173 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 709 transitions, 1584 flow [2022-07-12 10:18:08,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 683.3) internal successors, (6833), 10 states have internal predecessors, (6833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,174 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:08,174 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] [2022-07-12 10:18:08,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:08,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-07-12 10:18:08,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1492616703, now seen corresponding path program 1 times [2022-07-12 10:18:08,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:08,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495371521] [2022-07-12 10:18:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:08,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:08,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:08,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495371521] [2022-07-12 10:18:08,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495371521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:08,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868412253] [2022-07-12 10:18:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:08,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:08,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:08,423 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:08,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-12 10:18:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:08,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:08,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:08,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:08,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868412253] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:08,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:08,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:08,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493584665] [2022-07-12 10:18:08,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:08,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:08,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:08,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:08,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:08,987 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-12 10:18:08,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 709 transitions, 1584 flow. Second operand has 18 states, 18 states have (on average 683.6111111111111) internal successors, (12305), 18 states have internal predecessors, (12305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:08,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-12 10:18:08,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:09,608 INFO L129 PetriNetUnfolder]: 0/1100 cut-off events. [2022-07-12 10:18:09,608 INFO L130 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-07-12 10:18:09,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 1100 events. 0/1100 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3542 event pairs, 0 based on Foata normal form. 4/1104 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-12 10:18:09,610 INFO L132 encePairwiseOnDemand]: 856/862 looper letters, 42 selfloop transitions, 21 changer transitions 0/733 dead transitions. [2022-07-12 10:18:09,610 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 733 transitions, 1818 flow [2022-07-12 10:18:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14368 transitions. [2022-07-12 10:18:09,617 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7937244503369794 [2022-07-12 10:18:09,617 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14368 transitions. [2022-07-12 10:18:09,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14368 transitions. [2022-07-12 10:18:09,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:09,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14368 transitions. [2022-07-12 10:18:09,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 684.1904761904761) internal successors, (14368), 21 states have internal predecessors, (14368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:09,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 862.0) internal successors, (18964), 22 states have internal predecessors, (18964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:09,637 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 862.0) internal successors, (18964), 22 states have internal predecessors, (18964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:09,637 INFO L186 Difference]: Start difference. First operand has 764 places, 709 transitions, 1584 flow. Second operand 21 states and 14368 transitions. [2022-07-12 10:18:09,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 733 transitions, 1818 flow [2022-07-12 10:18:09,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 783 places, 733 transitions, 1804 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:09,648 INFO L242 Difference]: Finished difference. Result has 788 places, 722 transitions, 1708 flow [2022-07-12 10:18:09,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1708, PETRI_PLACES=788, PETRI_TRANSITIONS=722} [2022-07-12 10:18:09,652 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 25 predicate places. [2022-07-12 10:18:09,659 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 722 transitions, 1708 flow [2022-07-12 10:18:09,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 683.6111111111111) internal successors, (12305), 18 states have internal predecessors, (12305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:09,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:09,661 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:09,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-07-12 10:18:09,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-07-12 10:18:09,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash -111277213, now seen corresponding path program 1 times [2022-07-12 10:18:09,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:09,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202845866] [2022-07-12 10:18:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:09,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:09,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:09,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202845866] [2022-07-12 10:18:09,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202845866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:09,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692969965] [2022-07-12 10:18:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:09,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:09,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:09,971 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:09,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-12 10:18:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:10,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:10,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692969965] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:10,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:10,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:10,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318005552] [2022-07-12 10:18:10,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:10,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:10,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:10,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:10,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:10,749 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-12 10:18:10,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 722 transitions, 1708 flow. Second operand has 34 states, 34 states have (on average 683.7941176470588) internal successors, (23249), 34 states have internal predecessors, (23249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:10,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:10,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-12 10:18:10,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:11,745 INFO L129 PetriNetUnfolder]: 0/1012 cut-off events. [2022-07-12 10:18:11,746 INFO L130 PetriNetUnfolder]: For 519/519 co-relation queries the response was YES. [2022-07-12 10:18:11,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 1012 events. 0/1012 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2958 event pairs, 0 based on Foata normal form. 8/1020 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2022-07-12 10:18:11,748 INFO L132 encePairwiseOnDemand]: 856/862 looper letters, 58 selfloop transitions, 45 changer transitions 0/773 dead transitions. [2022-07-12 10:18:11,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 773 transitions, 2230 flow [2022-07-12 10:18:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 30756 transitions. [2022-07-12 10:18:11,761 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928847641144625 [2022-07-12 10:18:11,761 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 30756 transitions. [2022-07-12 10:18:11,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 30756 transitions. [2022-07-12 10:18:11,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:11,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 30756 transitions. [2022-07-12 10:18:11,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 683.4666666666667) internal successors, (30756), 45 states have internal predecessors, (30756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:11,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 862.0) internal successors, (39652), 46 states have internal predecessors, (39652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:11,814 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 862.0) internal successors, (39652), 46 states have internal predecessors, (39652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:11,814 INFO L186 Difference]: Start difference. First operand has 788 places, 722 transitions, 1708 flow. Second operand 45 states and 30756 transitions. [2022-07-12 10:18:11,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 773 transitions, 2230 flow [2022-07-12 10:18:11,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 826 places, 773 transitions, 2190 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:11,829 INFO L242 Difference]: Finished difference. Result has 835 places, 747 transitions, 1986 flow [2022-07-12 10:18:11,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1986, PETRI_PLACES=835, PETRI_TRANSITIONS=747} [2022-07-12 10:18:11,830 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 72 predicate places. [2022-07-12 10:18:11,831 INFO L495 AbstractCegarLoop]: Abstraction has has 835 places, 747 transitions, 1986 flow [2022-07-12 10:18:11,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 683.7941176470588) internal successors, (23249), 34 states have internal predecessors, (23249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:11,834 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:11,834 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:11,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:12,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-07-12 10:18:12,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:12,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash 74524247, now seen corresponding path program 1 times [2022-07-12 10:18:12,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:12,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519095067] [2022-07-12 10:18:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:12,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:12,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:12,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519095067] [2022-07-12 10:18:12,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519095067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:12,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143563872] [2022-07-12 10:18:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:12,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:12,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:12,400 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:12,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-12 10:18:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:12,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:12,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:13,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:13,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143563872] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:13,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:13,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:13,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741533485] [2022-07-12 10:18:13,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:13,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:13,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:13,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:13,863 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-12 10:18:13,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 835 places, 747 transitions, 1986 flow. Second operand has 66 states, 66 states have (on average 683.8939393939394) internal successors, (45137), 66 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:13,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:13,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-12 10:18:13,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:15,321 INFO L129 PetriNetUnfolder]: 0/902 cut-off events. [2022-07-12 10:18:15,321 INFO L130 PetriNetUnfolder]: For 1377/1377 co-relation queries the response was YES. [2022-07-12 10:18:15,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 902 events. 0/902 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2247 event pairs, 0 based on Foata normal form. 10/912 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2022-07-12 10:18:15,323 INFO L132 encePairwiseOnDemand]: 857/862 looper letters, 75 selfloop transitions, 73 changer transitions 0/808 dead transitions. [2022-07-12 10:18:15,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 808 transitions, 2772 flow [2022-07-12 10:18:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-12 10:18:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-12 10:18:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 51233 transitions. [2022-07-12 10:18:15,343 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924671307037896 [2022-07-12 10:18:15,343 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 51233 transitions. [2022-07-12 10:18:15,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 51233 transitions. [2022-07-12 10:18:15,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:15,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 51233 transitions. [2022-07-12 10:18:15,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 683.1066666666667) internal successors, (51233), 75 states have internal predecessors, (51233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:15,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 862.0) internal successors, (65512), 76 states have internal predecessors, (65512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:15,427 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 862.0) internal successors, (65512), 76 states have internal predecessors, (65512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:15,428 INFO L186 Difference]: Start difference. First operand has 835 places, 747 transitions, 1986 flow. Second operand 75 states and 51233 transitions. [2022-07-12 10:18:15,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 808 transitions, 2772 flow [2022-07-12 10:18:15,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 865 places, 808 transitions, 2571 flow, removed 19 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:15,438 INFO L242 Difference]: Finished difference. Result has 865 places, 763 transitions, 2175 flow [2022-07-12 10:18:15,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=2175, PETRI_PLACES=865, PETRI_TRANSITIONS=763} [2022-07-12 10:18:15,439 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 102 predicate places. [2022-07-12 10:18:15,439 INFO L495 AbstractCegarLoop]: Abstraction has has 865 places, 763 transitions, 2175 flow [2022-07-12 10:18:15,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 683.8939393939394) internal successors, (45137), 66 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:15,443 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:15,443 INFO L200 CegarLoopForPetriNet]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:15,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-07-12 10:18:15,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:15,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:15,646 INFO L85 PathProgramCache]: Analyzing trace with hash 488055662, now seen corresponding path program 1 times [2022-07-12 10:18:15,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:15,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441469106] [2022-07-12 10:18:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:15,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:15,679 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:15,741 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:15,741 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:15,741 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:15,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:15,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-07-12 10:18:15,742 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:18:15,742 WARN L231 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:15,742 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2022-07-12 10:18:15,796 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:15,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 792 places, 895 transitions, 2515 flow [2022-07-12 10:18:16,439 INFO L129 PetriNetUnfolder]: 254/1790 cut-off events. [2022-07-12 10:18:16,439 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-12 10:18:16,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2191 conditions, 1790 events. 254/1790 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6609 event pairs, 0 based on Foata normal form. 0/1484 useless extension candidates. Maximal degree in co-relation 2066. Up to 52 conditions per place. [2022-07-12 10:18:16,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 792 places, 895 transitions, 2515 flow [2022-07-12 10:18:16,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 792 places, 895 transitions, 2515 flow [2022-07-12 10:18:16,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:16,530 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:18:16,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:16,534 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-12 10:18:16,534 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:16,534 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:16,534 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] [2022-07-12 10:18:16,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:16,534 INFO L85 PathProgramCache]: Analyzing trace with hash 180318754, now seen corresponding path program 1 times [2022-07-12 10:18:16,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:16,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800019197] [2022-07-12 10:18:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:16,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:16,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:16,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800019197] [2022-07-12 10:18:16,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800019197] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:16,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:16,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:16,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932666233] [2022-07-12 10:18:16,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:16,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:16,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:16,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:16,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:16,552 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 708 out of 895 [2022-07-12 10:18:16,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 895 transitions, 2515 flow. Second operand has 3 states, 3 states have (on average 709.0) internal successors, (2127), 3 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:16,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:16,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 708 of 895 [2022-07-12 10:18:16,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:17,231 INFO L129 PetriNetUnfolder]: 0/1488 cut-off events. [2022-07-12 10:18:17,231 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-12 10:18:17,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 1488 events. 0/1488 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6075 event pairs, 0 based on Foata normal form. 10799/12237 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2022-07-12 10:18:17,234 INFO L132 encePairwiseOnDemand]: 738/895 looper letters, 34 selfloop transitions, 2 changer transitions 11/744 dead transitions. [2022-07-12 10:18:17,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 744 transitions, 2285 flow [2022-07-12 10:18:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2322 transitions. [2022-07-12 10:18:17,236 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.864804469273743 [2022-07-12 10:18:17,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2322 transitions. [2022-07-12 10:18:17,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2322 transitions. [2022-07-12 10:18:17,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:17,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2322 transitions. [2022-07-12 10:18:17,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 774.0) internal successors, (2322), 3 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:17,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 895.0) internal successors, (3580), 4 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:17,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 895.0) internal successors, (3580), 4 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:17,240 INFO L186 Difference]: Start difference. First operand has 792 places, 895 transitions, 2515 flow. Second operand 3 states and 2322 transitions. [2022-07-12 10:18:17,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 744 transitions, 2285 flow [2022-07-12 10:18:17,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 744 transitions, 1685 flow, removed 300 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:17,250 INFO L242 Difference]: Finished difference. Result has 794 places, 730 transitions, 1595 flow [2022-07-12 10:18:17,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1595, PETRI_PLACES=794, PETRI_TRANSITIONS=730} [2022-07-12 10:18:17,251 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 2 predicate places. [2022-07-12 10:18:17,251 INFO L495 AbstractCegarLoop]: Abstraction has has 794 places, 730 transitions, 1595 flow [2022-07-12 10:18:17,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 709.0) internal successors, (2127), 3 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:17,251 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:17,251 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] [2022-07-12 10:18:17,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-07-12 10:18:17,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1827379178, now seen corresponding path program 1 times [2022-07-12 10:18:17,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:17,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105368458] [2022-07-12 10:18:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:17,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:17,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:17,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105368458] [2022-07-12 10:18:17,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105368458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:17,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917730986] [2022-07-12 10:18:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:17,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:17,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:17,278 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:17,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-12 10:18:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:17,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:17,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:17,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:17,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917730986] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:17,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:17,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:17,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849412] [2022-07-12 10:18:17,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:17,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:17,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:17,813 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-12 10:18:17,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 730 transitions, 1595 flow. Second operand has 10 states, 10 states have (on average 709.3) internal successors, (7093), 10 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:17,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:17,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-12 10:18:17,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:18,417 INFO L129 PetriNetUnfolder]: 0/1191 cut-off events. [2022-07-12 10:18:18,418 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-07-12 10:18:18,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 1191 events. 0/1191 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3982 event pairs, 0 based on Foata normal form. 2/1193 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-07-12 10:18:18,420 INFO L132 encePairwiseOnDemand]: 889/895 looper letters, 35 selfloop transitions, 9 changer transitions 0/740 dead transitions. [2022-07-12 10:18:18,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 740 transitions, 1705 flow [2022-07-12 10:18:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6409 transitions. [2022-07-12 10:18:18,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956548727498448 [2022-07-12 10:18:18,423 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6409 transitions. [2022-07-12 10:18:18,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6409 transitions. [2022-07-12 10:18:18,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:18,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6409 transitions. [2022-07-12 10:18:18,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 712.1111111111111) internal successors, (6409), 9 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:18,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 895.0) internal successors, (8950), 10 states have internal predecessors, (8950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:18,432 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 895.0) internal successors, (8950), 10 states have internal predecessors, (8950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:18,432 INFO L186 Difference]: Start difference. First operand has 794 places, 730 transitions, 1595 flow. Second operand 9 states and 6409 transitions. [2022-07-12 10:18:18,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 740 transitions, 1705 flow [2022-07-12 10:18:18,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 790 places, 740 transitions, 1703 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:18,439 INFO L242 Difference]: Finished difference. Result has 793 places, 736 transitions, 1643 flow [2022-07-12 10:18:18,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1643, PETRI_PLACES=793, PETRI_TRANSITIONS=736} [2022-07-12 10:18:18,440 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 1 predicate places. [2022-07-12 10:18:18,440 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 736 transitions, 1643 flow [2022-07-12 10:18:18,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 709.3) internal successors, (7093), 10 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:18,441 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:18,441 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] [2022-07-12 10:18:18,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-07-12 10:18:18,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-07-12 10:18:18,641 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:18,642 INFO L85 PathProgramCache]: Analyzing trace with hash -517161535, now seen corresponding path program 1 times [2022-07-12 10:18:18,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:18,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698637039] [2022-07-12 10:18:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:18,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:18,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:18,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698637039] [2022-07-12 10:18:18,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698637039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:18,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891590860] [2022-07-12 10:18:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:18,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:18,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:18,689 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:18,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-12 10:18:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:19,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:19,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:19,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:19,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891590860] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:19,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:19,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:19,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24618374] [2022-07-12 10:18:19,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:19,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:19,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:19,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:19,293 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-12 10:18:19,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 736 transitions, 1643 flow. Second operand has 18 states, 18 states have (on average 709.6111111111111) internal successors, (12773), 18 states have internal predecessors, (12773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:19,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:19,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-12 10:18:19,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:19,963 INFO L129 PetriNetUnfolder]: 0/1147 cut-off events. [2022-07-12 10:18:19,963 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-07-12 10:18:19,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 1147 events. 0/1147 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3713 event pairs, 0 based on Foata normal form. 4/1151 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-12 10:18:19,966 INFO L132 encePairwiseOnDemand]: 889/895 looper letters, 43 selfloop transitions, 21 changer transitions 0/760 dead transitions. [2022-07-12 10:18:19,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 813 places, 760 transitions, 1879 flow [2022-07-12 10:18:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14915 transitions. [2022-07-12 10:18:19,972 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7935621175844639 [2022-07-12 10:18:19,972 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14915 transitions. [2022-07-12 10:18:19,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14915 transitions. [2022-07-12 10:18:19,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:19,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14915 transitions. [2022-07-12 10:18:19,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 710.2380952380952) internal successors, (14915), 21 states have internal predecessors, (14915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:19,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 895.0) internal successors, (19690), 22 states have internal predecessors, (19690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:19,993 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 895.0) internal successors, (19690), 22 states have internal predecessors, (19690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:19,994 INFO L186 Difference]: Start difference. First operand has 793 places, 736 transitions, 1643 flow. Second operand 21 states and 14915 transitions. [2022-07-12 10:18:19,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 813 places, 760 transitions, 1879 flow [2022-07-12 10:18:19,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 760 transitions, 1865 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:20,003 INFO L242 Difference]: Finished difference. Result has 817 places, 749 transitions, 1767 flow [2022-07-12 10:18:20,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1767, PETRI_PLACES=817, PETRI_TRANSITIONS=749} [2022-07-12 10:18:20,003 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 25 predicate places. [2022-07-12 10:18:20,003 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 749 transitions, 1767 flow [2022-07-12 10:18:20,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 709.6111111111111) internal successors, (12773), 18 states have internal predecessors, (12773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:20,004 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:20,005 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:20,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-07-12 10:18:20,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:20,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:20,205 INFO L85 PathProgramCache]: Analyzing trace with hash 343952675, now seen corresponding path program 1 times [2022-07-12 10:18:20,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:20,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711217988] [2022-07-12 10:18:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:20,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:20,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711217988] [2022-07-12 10:18:20,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711217988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359380777] [2022-07-12 10:18:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:20,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:20,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:20,307 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:20,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-12 10:18:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:20,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:20,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:20,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:21,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359380777] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:21,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:21,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:21,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300729714] [2022-07-12 10:18:21,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:21,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:21,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:21,129 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-12 10:18:21,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 749 transitions, 1767 flow. Second operand has 34 states, 34 states have (on average 709.7941176470588) internal successors, (24133), 34 states have internal predecessors, (24133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:21,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:21,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-12 10:18:21,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:22,104 INFO L129 PetriNetUnfolder]: 0/1059 cut-off events. [2022-07-12 10:18:22,104 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-12 10:18:22,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 1059 events. 0/1059 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3118 event pairs, 0 based on Foata normal form. 8/1067 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-12 10:18:22,106 INFO L132 encePairwiseOnDemand]: 889/895 looper letters, 59 selfloop transitions, 45 changer transitions 0/800 dead transitions. [2022-07-12 10:18:22,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 861 places, 800 transitions, 2291 flow [2022-07-12 10:18:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 31927 transitions. [2022-07-12 10:18:22,121 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927250155183116 [2022-07-12 10:18:22,121 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 31927 transitions. [2022-07-12 10:18:22,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 31927 transitions. [2022-07-12 10:18:22,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:22,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 31927 transitions. [2022-07-12 10:18:22,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 709.4888888888889) internal successors, (31927), 45 states have internal predecessors, (31927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:22,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 895.0) internal successors, (41170), 46 states have internal predecessors, (41170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:22,179 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 895.0) internal successors, (41170), 46 states have internal predecessors, (41170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:22,179 INFO L186 Difference]: Start difference. First operand has 817 places, 749 transitions, 1767 flow. Second operand 45 states and 31927 transitions. [2022-07-12 10:18:22,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 861 places, 800 transitions, 2291 flow [2022-07-12 10:18:22,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 800 transitions, 2251 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:22,189 INFO L242 Difference]: Finished difference. Result has 864 places, 774 transitions, 2045 flow [2022-07-12 10:18:22,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2045, PETRI_PLACES=864, PETRI_TRANSITIONS=774} [2022-07-12 10:18:22,190 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 72 predicate places. [2022-07-12 10:18:22,190 INFO L495 AbstractCegarLoop]: Abstraction has has 864 places, 774 transitions, 2045 flow [2022-07-12 10:18:22,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 709.7941176470588) internal successors, (24133), 34 states have internal predecessors, (24133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:22,193 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:22,193 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:22,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-07-12 10:18:22,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:22,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:22,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1400019945, now seen corresponding path program 1 times [2022-07-12 10:18:22,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:22,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259547082] [2022-07-12 10:18:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:22,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:22,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:22,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259547082] [2022-07-12 10:18:22,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259547082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:22,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144632814] [2022-07-12 10:18:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:22,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:22,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:22,741 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:22,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-12 10:18:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:23,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:23,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:23,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:24,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144632814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:24,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:24,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:24,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003940657] [2022-07-12 10:18:24,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:24,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:24,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:24,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:24,187 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-12 10:18:24,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 774 transitions, 2045 flow. Second operand has 66 states, 66 states have (on average 709.8939393939394) internal successors, (46853), 66 states have internal predecessors, (46853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:24,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:24,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-12 10:18:24,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:25,809 INFO L129 PetriNetUnfolder]: 0/938 cut-off events. [2022-07-12 10:18:25,809 INFO L130 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2022-07-12 10:18:25,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 938 events. 0/938 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2345 event pairs, 0 based on Foata normal form. 11/949 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2022-07-12 10:18:25,811 INFO L132 encePairwiseOnDemand]: 890/895 looper letters, 78 selfloop transitions, 76 changer transitions 0/840 dead transitions. [2022-07-12 10:18:25,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 840 transitions, 2887 flow [2022-07-12 10:18:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-12 10:18:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-12 10:18:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 55311 transitions. [2022-07-12 10:18:25,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923076923076923 [2022-07-12 10:18:25,833 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 55311 transitions. [2022-07-12 10:18:25,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 55311 transitions. [2022-07-12 10:18:25,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:25,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 55311 transitions. [2022-07-12 10:18:25,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 709.1153846153846) internal successors, (55311), 78 states have internal predecessors, (55311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:25,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 895.0) internal successors, (70705), 79 states have internal predecessors, (70705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:25,929 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 895.0) internal successors, (70705), 79 states have internal predecessors, (70705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:25,930 INFO L186 Difference]: Start difference. First operand has 864 places, 774 transitions, 2045 flow. Second operand 78 states and 55311 transitions. [2022-07-12 10:18:25,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 840 transitions, 2887 flow [2022-07-12 10:18:25,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 840 transitions, 2678 flow, removed 20 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:25,942 INFO L242 Difference]: Finished difference. Result has 897 places, 793 transitions, 2263 flow [2022-07-12 10:18:25,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2263, PETRI_PLACES=897, PETRI_TRANSITIONS=793} [2022-07-12 10:18:25,943 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 105 predicate places. [2022-07-12 10:18:25,943 INFO L495 AbstractCegarLoop]: Abstraction has has 897 places, 793 transitions, 2263 flow [2022-07-12 10:18:25,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 709.8939393939394) internal successors, (46853), 66 states have internal predecessors, (46853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:25,949 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:25,949 INFO L200 CegarLoopForPetriNet]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:25,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:26,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:26,175 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:26,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:26,176 INFO L85 PathProgramCache]: Analyzing trace with hash -906765510, now seen corresponding path program 1 times [2022-07-12 10:18:26,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:26,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130922089] [2022-07-12 10:18:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:26,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:26,210 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:26,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:26,276 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:26,277 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:26,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:26,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-07-12 10:18:26,277 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:18:26,277 WARN L231 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:26,278 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2022-07-12 10:18:26,331 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:26,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 821 places, 928 transitions, 2636 flow [2022-07-12 10:18:26,945 INFO L129 PetriNetUnfolder]: 264/1859 cut-off events. [2022-07-12 10:18:26,946 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-12 10:18:27,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 1859 events. 264/1859 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6830 event pairs, 0 based on Foata normal form. 0/1541 useless extension candidates. Maximal degree in co-relation 2163. Up to 54 conditions per place. [2022-07-12 10:18:27,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 821 places, 928 transitions, 2636 flow [2022-07-12 10:18:27,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 821 places, 928 transitions, 2636 flow [2022-07-12 10:18:27,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:27,139 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:18:27,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:27,142 INFO L129 PetriNetUnfolder]: 4/78 cut-off events. [2022-07-12 10:18:27,142 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:27,142 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:27,142 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] [2022-07-12 10:18:27,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash 542009890, now seen corresponding path program 1 times [2022-07-12 10:18:27,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:27,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987727887] [2022-07-12 10:18:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:27,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987727887] [2022-07-12 10:18:27,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987727887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:27,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:27,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:27,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985087129] [2022-07-12 10:18:27,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:27,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:27,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:27,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:27,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:27,165 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 734 out of 928 [2022-07-12 10:18:27,165 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 928 transitions, 2636 flow. Second operand has 3 states, 3 states have (on average 735.0) internal successors, (2205), 3 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:27,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:27,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 734 of 928 [2022-07-12 10:18:27,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:27,858 INFO L129 PetriNetUnfolder]: 0/1546 cut-off events. [2022-07-12 10:18:27,858 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-12 10:18:27,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 1546 events. 0/1546 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6283 event pairs, 0 based on Foata normal form. 11698/13192 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2022-07-12 10:18:27,861 INFO L132 encePairwiseOnDemand]: 765/928 looper letters, 35 selfloop transitions, 2 changer transitions 11/771 dead transitions. [2022-07-12 10:18:27,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 771 transitions, 2396 flow [2022-07-12 10:18:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2407 transitions. [2022-07-12 10:18:27,863 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8645833333333334 [2022-07-12 10:18:27,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2407 transitions. [2022-07-12 10:18:27,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2407 transitions. [2022-07-12 10:18:27,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:27,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2407 transitions. [2022-07-12 10:18:27,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 802.3333333333334) internal successors, (2407), 3 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:27,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 928.0) internal successors, (3712), 4 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:27,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 928.0) internal successors, (3712), 4 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:27,866 INFO L186 Difference]: Start difference. First operand has 821 places, 928 transitions, 2636 flow. Second operand 3 states and 2407 transitions. [2022-07-12 10:18:27,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 771 transitions, 2396 flow [2022-07-12 10:18:27,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 822 places, 771 transitions, 1746 flow, removed 325 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:27,877 INFO L242 Difference]: Finished difference. Result has 823 places, 757 transitions, 1654 flow [2022-07-12 10:18:27,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1654, PETRI_PLACES=823, PETRI_TRANSITIONS=757} [2022-07-12 10:18:27,877 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 2 predicate places. [2022-07-12 10:18:27,877 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 757 transitions, 1654 flow [2022-07-12 10:18:27,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 735.0) internal successors, (2205), 3 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:27,878 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:27,878 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] [2022-07-12 10:18:27,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-07-12 10:18:27,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:27,878 INFO L85 PathProgramCache]: Analyzing trace with hash -351706058, now seen corresponding path program 1 times [2022-07-12 10:18:27,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:27,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814504571] [2022-07-12 10:18:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:27,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:27,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:27,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814504571] [2022-07-12 10:18:27,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814504571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:27,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117804999] [2022-07-12 10:18:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:27,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:27,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:27,905 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:27,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-12 10:18:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:28,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:28,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:28,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117804999] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:28,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:28,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:28,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981360634] [2022-07-12 10:18:28,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:28,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:28,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:28,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:28,500 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-12 10:18:28,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 757 transitions, 1654 flow. Second operand has 10 states, 10 states have (on average 735.3) internal successors, (7353), 10 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:28,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:28,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-12 10:18:28,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:29,101 INFO L129 PetriNetUnfolder]: 0/1238 cut-off events. [2022-07-12 10:18:29,101 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-12 10:18:29,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1582 conditions, 1238 events. 0/1238 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4176 event pairs, 0 based on Foata normal form. 2/1240 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-07-12 10:18:29,104 INFO L132 encePairwiseOnDemand]: 922/928 looper letters, 36 selfloop transitions, 9 changer transitions 0/767 dead transitions. [2022-07-12 10:18:29,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 767 transitions, 1766 flow [2022-07-12 10:18:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6644 transitions. [2022-07-12 10:18:29,107 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954980842911877 [2022-07-12 10:18:29,107 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6644 transitions. [2022-07-12 10:18:29,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6644 transitions. [2022-07-12 10:18:29,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:29,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6644 transitions. [2022-07-12 10:18:29,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 738.2222222222222) internal successors, (6644), 9 states have internal predecessors, (6644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:29,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 928.0) internal successors, (9280), 10 states have internal predecessors, (9280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:29,115 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 928.0) internal successors, (9280), 10 states have internal predecessors, (9280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:29,116 INFO L186 Difference]: Start difference. First operand has 823 places, 757 transitions, 1654 flow. Second operand 9 states and 6644 transitions. [2022-07-12 10:18:29,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 767 transitions, 1766 flow [2022-07-12 10:18:29,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 767 transitions, 1764 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:29,123 INFO L242 Difference]: Finished difference. Result has 822 places, 763 transitions, 1702 flow [2022-07-12 10:18:29,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1702, PETRI_PLACES=822, PETRI_TRANSITIONS=763} [2022-07-12 10:18:29,123 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 1 predicate places. [2022-07-12 10:18:29,124 INFO L495 AbstractCegarLoop]: Abstraction has has 822 places, 763 transitions, 1702 flow [2022-07-12 10:18:29,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 735.3) internal successors, (7353), 10 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:29,124 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:29,124 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] [2022-07-12 10:18:29,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-07-12 10:18:29,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:29,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1841547809, now seen corresponding path program 1 times [2022-07-12 10:18:29,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:29,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82669654] [2022-07-12 10:18:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:29,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:29,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:29,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82669654] [2022-07-12 10:18:29,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82669654] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:29,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733543316] [2022-07-12 10:18:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:29,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:29,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:29,372 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:29,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-12 10:18:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:29,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:29,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:29,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:30,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733543316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:30,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:30,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:30,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226452876] [2022-07-12 10:18:30,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:30,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:30,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:30,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:30,009 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-12 10:18:30,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 763 transitions, 1702 flow. Second operand has 18 states, 18 states have (on average 735.6111111111111) internal successors, (13241), 18 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:30,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:30,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-12 10:18:30,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:30,736 INFO L129 PetriNetUnfolder]: 0/1194 cut-off events. [2022-07-12 10:18:30,736 INFO L130 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-07-12 10:18:30,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1727 conditions, 1194 events. 0/1194 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3864 event pairs, 0 based on Foata normal form. 4/1198 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-12 10:18:30,739 INFO L132 encePairwiseOnDemand]: 922/928 looper letters, 44 selfloop transitions, 21 changer transitions 0/787 dead transitions. [2022-07-12 10:18:30,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 842 places, 787 transitions, 1940 flow [2022-07-12 10:18:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 15462 transitions. [2022-07-12 10:18:30,746 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934113300492611 [2022-07-12 10:18:30,746 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 15462 transitions. [2022-07-12 10:18:30,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 15462 transitions. [2022-07-12 10:18:30,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:30,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 15462 transitions. [2022-07-12 10:18:30,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 736.2857142857143) internal successors, (15462), 21 states have internal predecessors, (15462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:30,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 928.0) internal successors, (20416), 22 states have internal predecessors, (20416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:30,770 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 928.0) internal successors, (20416), 22 states have internal predecessors, (20416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:30,770 INFO L186 Difference]: Start difference. First operand has 822 places, 763 transitions, 1702 flow. Second operand 21 states and 15462 transitions. [2022-07-12 10:18:30,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 842 places, 787 transitions, 1940 flow [2022-07-12 10:18:30,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 787 transitions, 1926 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:30,881 INFO L242 Difference]: Finished difference. Result has 846 places, 776 transitions, 1826 flow [2022-07-12 10:18:30,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=821, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1826, PETRI_PLACES=846, PETRI_TRANSITIONS=776} [2022-07-12 10:18:30,882 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 25 predicate places. [2022-07-12 10:18:30,882 INFO L495 AbstractCegarLoop]: Abstraction has has 846 places, 776 transitions, 1826 flow [2022-07-12 10:18:30,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 735.6111111111111) internal successors, (13241), 18 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:30,883 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:30,884 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:30,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:31,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-07-12 10:18:31,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:31,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2074843651, now seen corresponding path program 1 times [2022-07-12 10:18:31,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:31,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022595930] [2022-07-12 10:18:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:31,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:31,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:31,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022595930] [2022-07-12 10:18:31,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022595930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:31,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640948679] [2022-07-12 10:18:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:31,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:31,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:31,210 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:31,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-12 10:18:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:31,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:31,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:31,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:32,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640948679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:32,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:32,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:32,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306338915] [2022-07-12 10:18:32,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:32,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:32,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:32,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:32,166 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-12 10:18:32,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 776 transitions, 1826 flow. Second operand has 34 states, 34 states have (on average 735.7941176470588) internal successors, (25017), 34 states have internal predecessors, (25017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:32,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:32,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-12 10:18:32,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:33,159 INFO L129 PetriNetUnfolder]: 0/1106 cut-off events. [2022-07-12 10:18:33,159 INFO L130 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-07-12 10:18:33,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1781 conditions, 1106 events. 0/1106 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3283 event pairs, 0 based on Foata normal form. 8/1114 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-12 10:18:33,162 INFO L132 encePairwiseOnDemand]: 922/928 looper letters, 60 selfloop transitions, 45 changer transitions 0/827 dead transitions. [2022-07-12 10:18:33,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 827 transitions, 2352 flow [2022-07-12 10:18:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 33098 transitions. [2022-07-12 10:18:33,175 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925766283524904 [2022-07-12 10:18:33,175 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 33098 transitions. [2022-07-12 10:18:33,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 33098 transitions. [2022-07-12 10:18:33,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:33,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 33098 transitions. [2022-07-12 10:18:33,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 735.5111111111111) internal successors, (33098), 45 states have internal predecessors, (33098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:33,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 928.0) internal successors, (42688), 46 states have internal predecessors, (42688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:33,235 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 928.0) internal successors, (42688), 46 states have internal predecessors, (42688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:33,235 INFO L186 Difference]: Start difference. First operand has 846 places, 776 transitions, 1826 flow. Second operand 45 states and 33098 transitions. [2022-07-12 10:18:33,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 890 places, 827 transitions, 2352 flow [2022-07-12 10:18:33,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 884 places, 827 transitions, 2312 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:33,246 INFO L242 Difference]: Finished difference. Result has 893 places, 801 transitions, 2104 flow [2022-07-12 10:18:33,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=840, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2104, PETRI_PLACES=893, PETRI_TRANSITIONS=801} [2022-07-12 10:18:33,246 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 72 predicate places. [2022-07-12 10:18:33,246 INFO L495 AbstractCegarLoop]: Abstraction has has 893 places, 801 transitions, 2104 flow [2022-07-12 10:18:33,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 735.7941176470588) internal successors, (25017), 34 states have internal predecessors, (25017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:33,249 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:33,249 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:33,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-07-12 10:18:33,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:33,449 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1239527927, now seen corresponding path program 1 times [2022-07-12 10:18:33,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:33,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613805159] [2022-07-12 10:18:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:33,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:33,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:33,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613805159] [2022-07-12 10:18:33,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613805159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:33,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017939461] [2022-07-12 10:18:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:33,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:33,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:33,763 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:33,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-12 10:18:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:34,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:35,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017939461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:35,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:35,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:35,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804487089] [2022-07-12 10:18:35,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:35,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:35,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:35,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:35,318 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-12 10:18:35,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 801 transitions, 2104 flow. Second operand has 66 states, 66 states have (on average 735.8939393939394) internal successors, (48569), 66 states have internal predecessors, (48569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:35,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:35,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-12 10:18:35,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:37,236 INFO L129 PetriNetUnfolder]: 0/974 cut-off events. [2022-07-12 10:18:37,236 INFO L130 PetriNetUnfolder]: For 1619/1619 co-relation queries the response was YES. [2022-07-12 10:18:37,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 974 events. 0/974 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2443 event pairs, 0 based on Foata normal form. 12/986 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-12 10:18:37,239 INFO L132 encePairwiseOnDemand]: 923/928 looper letters, 81 selfloop transitions, 79 changer transitions 0/872 dead transitions. [2022-07-12 10:18:37,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 872 transitions, 3002 flow [2022-07-12 10:18:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-12 10:18:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-12 10:18:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 59545 transitions. [2022-07-12 10:18:37,273 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921588974031503 [2022-07-12 10:18:37,273 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 59545 transitions. [2022-07-12 10:18:37,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 59545 transitions. [2022-07-12 10:18:37,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:37,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 59545 transitions. [2022-07-12 10:18:37,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 735.1234567901234) internal successors, (59545), 81 states have internal predecessors, (59545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:37,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 928.0) internal successors, (76096), 82 states have internal predecessors, (76096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:37,405 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 928.0) internal successors, (76096), 82 states have internal predecessors, (76096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:37,405 INFO L186 Difference]: Start difference. First operand has 893 places, 801 transitions, 2104 flow. Second operand 81 states and 59545 transitions. [2022-07-12 10:18:37,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 872 transitions, 3002 flow [2022-07-12 10:18:37,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 872 transitions, 2785 flow, removed 21 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:37,419 INFO L242 Difference]: Finished difference. Result has 929 places, 823 transitions, 2351 flow [2022-07-12 10:18:37,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2351, PETRI_PLACES=929, PETRI_TRANSITIONS=823} [2022-07-12 10:18:37,420 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 108 predicate places. [2022-07-12 10:18:37,420 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 823 transitions, 2351 flow [2022-07-12 10:18:37,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 735.8939393939394) internal successors, (48569), 66 states have internal predecessors, (48569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:37,428 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:37,428 INFO L200 CegarLoopForPetriNet]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:37,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:37,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:37,655 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:37,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1409301607, now seen corresponding path program 1 times [2022-07-12 10:18:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:37,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806083520] [2022-07-12 10:18:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:37,689 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:37,743 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:37,743 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:37,744 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:37,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:37,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-07-12 10:18:37,744 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:18:37,744 WARN L231 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:37,744 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2022-07-12 10:18:37,799 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:37,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 850 places, 961 transitions, 2759 flow [2022-07-12 10:18:38,586 INFO L129 PetriNetUnfolder]: 274/1928 cut-off events. [2022-07-12 10:18:38,586 INFO L130 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-07-12 10:18:38,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2388 conditions, 1928 events. 274/1928 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7047 event pairs, 0 based on Foata normal form. 0/1598 useless extension candidates. Maximal degree in co-relation 2261. Up to 56 conditions per place. [2022-07-12 10:18:38,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 850 places, 961 transitions, 2759 flow [2022-07-12 10:18:38,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 850 places, 961 transitions, 2759 flow [2022-07-12 10:18:38,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:38,708 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:18:38,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:38,711 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-12 10:18:38,712 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:38,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:38,712 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] [2022-07-12 10:18:38,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash -967113502, now seen corresponding path program 1 times [2022-07-12 10:18:38,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:38,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827112533] [2022-07-12 10:18:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:38,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:38,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827112533] [2022-07-12 10:18:38,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827112533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:38,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:38,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:38,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208719647] [2022-07-12 10:18:38,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:38,737 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 760 out of 961 [2022-07-12 10:18:38,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 961 transitions, 2759 flow. Second operand has 3 states, 3 states have (on average 761.0) internal successors, (2283), 3 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:38,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:38,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 760 of 961 [2022-07-12 10:18:38,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:39,563 INFO L129 PetriNetUnfolder]: 0/1604 cut-off events. [2022-07-12 10:18:39,563 INFO L130 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-07-12 10:18:39,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2231 conditions, 1604 events. 0/1604 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6535 event pairs, 0 based on Foata normal form. 12633/14183 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2022-07-12 10:18:39,566 INFO L132 encePairwiseOnDemand]: 792/961 looper letters, 36 selfloop transitions, 2 changer transitions 11/798 dead transitions. [2022-07-12 10:18:39,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 851 places, 798 transitions, 2509 flow [2022-07-12 10:18:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2492 transitions. [2022-07-12 10:18:39,568 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8643773846687478 [2022-07-12 10:18:39,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2492 transitions. [2022-07-12 10:18:39,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2492 transitions. [2022-07-12 10:18:39,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:39,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2492 transitions. [2022-07-12 10:18:39,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 830.6666666666666) internal successors, (2492), 3 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:39,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 961.0) internal successors, (3844), 4 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:39,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 961.0) internal successors, (3844), 4 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:39,571 INFO L186 Difference]: Start difference. First operand has 850 places, 961 transitions, 2759 flow. Second operand 3 states and 2492 transitions. [2022-07-12 10:18:39,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 851 places, 798 transitions, 2509 flow [2022-07-12 10:18:39,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 798 transitions, 1807 flow, removed 351 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:39,582 INFO L242 Difference]: Finished difference. Result has 852 places, 784 transitions, 1713 flow [2022-07-12 10:18:39,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1713, PETRI_PLACES=852, PETRI_TRANSITIONS=784} [2022-07-12 10:18:39,583 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 2 predicate places. [2022-07-12 10:18:39,583 INFO L495 AbstractCegarLoop]: Abstraction has has 852 places, 784 transitions, 1713 flow [2022-07-12 10:18:39,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 761.0) internal successors, (2283), 3 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:39,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:39,583 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] [2022-07-12 10:18:39,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-07-12 10:18:39,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:39,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:39,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1978771530, now seen corresponding path program 1 times [2022-07-12 10:18:39,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:39,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848592354] [2022-07-12 10:18:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:39,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:39,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:39,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848592354] [2022-07-12 10:18:39,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848592354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:39,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728005143] [2022-07-12 10:18:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:39,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:39,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:39,617 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:39,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-12 10:18:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:40,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:40,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:40,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:40,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728005143] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:40,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:40,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:40,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574280668] [2022-07-12 10:18:40,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:40,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:40,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:40,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:40,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:40,211 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-12 10:18:40,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 852 places, 784 transitions, 1713 flow. Second operand has 10 states, 10 states have (on average 761.3) internal successors, (7613), 10 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:40,213 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:40,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-12 10:18:40,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:40,897 INFO L129 PetriNetUnfolder]: 0/1285 cut-off events. [2022-07-12 10:18:40,897 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-12 10:18:40,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 1285 events. 0/1285 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4322 event pairs, 0 based on Foata normal form. 2/1287 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-07-12 10:18:40,900 INFO L132 encePairwiseOnDemand]: 955/961 looper letters, 37 selfloop transitions, 9 changer transitions 0/794 dead transitions. [2022-07-12 10:18:40,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 794 transitions, 1827 flow [2022-07-12 10:18:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:40,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6879 transitions. [2022-07-12 10:18:40,903 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953520638224072 [2022-07-12 10:18:40,903 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6879 transitions. [2022-07-12 10:18:40,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6879 transitions. [2022-07-12 10:18:40,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:40,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6879 transitions. [2022-07-12 10:18:40,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 764.3333333333334) internal successors, (6879), 9 states have internal predecessors, (6879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:40,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 961.0) internal successors, (9610), 10 states have internal predecessors, (9610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:40,912 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 961.0) internal successors, (9610), 10 states have internal predecessors, (9610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:40,912 INFO L186 Difference]: Start difference. First operand has 852 places, 784 transitions, 1713 flow. Second operand 9 states and 6879 transitions. [2022-07-12 10:18:40,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 794 transitions, 1827 flow [2022-07-12 10:18:40,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 848 places, 794 transitions, 1825 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:40,920 INFO L242 Difference]: Finished difference. Result has 851 places, 790 transitions, 1761 flow [2022-07-12 10:18:40,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=840, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1761, PETRI_PLACES=851, PETRI_TRANSITIONS=790} [2022-07-12 10:18:40,920 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 1 predicate places. [2022-07-12 10:18:40,920 INFO L495 AbstractCegarLoop]: Abstraction has has 851 places, 790 transitions, 1761 flow [2022-07-12 10:18:40,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 761.3) internal successors, (7613), 10 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:40,921 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:40,921 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] [2022-07-12 10:18:40,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-07-12 10:18:41,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:41,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:41,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:41,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1288544033, now seen corresponding path program 1 times [2022-07-12 10:18:41,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:41,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938338603] [2022-07-12 10:18:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:41,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:41,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:41,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938338603] [2022-07-12 10:18:41,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938338603] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:41,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906687359] [2022-07-12 10:18:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:41,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:41,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:41,172 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:41,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-12 10:18:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:41,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:41,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:41,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:41,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906687359] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:41,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:41,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:41,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731259367] [2022-07-12 10:18:41,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:41,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:41,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:41,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:41,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:41,857 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-12 10:18:41,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 790 transitions, 1761 flow. Second operand has 18 states, 18 states have (on average 761.6111111111111) internal successors, (13709), 18 states have internal predecessors, (13709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:41,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:41,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-12 10:18:41,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:42,611 INFO L129 PetriNetUnfolder]: 0/1241 cut-off events. [2022-07-12 10:18:42,611 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-12 10:18:42,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 1241 events. 0/1241 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4052 event pairs, 0 based on Foata normal form. 4/1245 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-12 10:18:42,614 INFO L132 encePairwiseOnDemand]: 955/961 looper letters, 45 selfloop transitions, 21 changer transitions 0/814 dead transitions. [2022-07-12 10:18:42,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 814 transitions, 2001 flow [2022-07-12 10:18:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:42,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:42,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16009 transitions. [2022-07-12 10:18:42,620 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932708983697537 [2022-07-12 10:18:42,621 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16009 transitions. [2022-07-12 10:18:42,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16009 transitions. [2022-07-12 10:18:42,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:42,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16009 transitions. [2022-07-12 10:18:42,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 762.3333333333334) internal successors, (16009), 21 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:42,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 961.0) internal successors, (21142), 22 states have internal predecessors, (21142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:42,644 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 961.0) internal successors, (21142), 22 states have internal predecessors, (21142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:42,644 INFO L186 Difference]: Start difference. First operand has 851 places, 790 transitions, 1761 flow. Second operand 21 states and 16009 transitions. [2022-07-12 10:18:42,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 814 transitions, 2001 flow [2022-07-12 10:18:42,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 814 transitions, 1987 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:42,654 INFO L242 Difference]: Finished difference. Result has 875 places, 803 transitions, 1885 flow [2022-07-12 10:18:42,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=850, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1885, PETRI_PLACES=875, PETRI_TRANSITIONS=803} [2022-07-12 10:18:42,655 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 25 predicate places. [2022-07-12 10:18:42,655 INFO L495 AbstractCegarLoop]: Abstraction has has 875 places, 803 transitions, 1885 flow [2022-07-12 10:18:42,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 761.6111111111111) internal successors, (13709), 18 states have internal predecessors, (13709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:42,656 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:42,656 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:42,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:42,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:42,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 786428419, now seen corresponding path program 1 times [2022-07-12 10:18:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:42,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013933185] [2022-07-12 10:18:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:42,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:42,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013933185] [2022-07-12 10:18:42,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013933185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:42,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455739692] [2022-07-12 10:18:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:42,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:42,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:42,965 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:42,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-12 10:18:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:43,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:43,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:43,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455739692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:43,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:43,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:43,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872646038] [2022-07-12 10:18:43,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:43,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:43,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:43,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:43,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:43,919 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-12 10:18:43,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 875 places, 803 transitions, 1885 flow. Second operand has 34 states, 34 states have (on average 761.7941176470588) internal successors, (25901), 34 states have internal predecessors, (25901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:43,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:43,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-12 10:18:43,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:45,011 INFO L129 PetriNetUnfolder]: 0/1153 cut-off events. [2022-07-12 10:18:45,012 INFO L130 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2022-07-12 10:18:45,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 1153 events. 0/1153 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3471 event pairs, 0 based on Foata normal form. 8/1161 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-12 10:18:45,014 INFO L132 encePairwiseOnDemand]: 955/961 looper letters, 61 selfloop transitions, 45 changer transitions 0/854 dead transitions. [2022-07-12 10:18:45,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 919 places, 854 transitions, 2413 flow [2022-07-12 10:18:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 34269 transitions. [2022-07-12 10:18:45,104 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924384321886924 [2022-07-12 10:18:45,104 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 34269 transitions. [2022-07-12 10:18:45,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 34269 transitions. [2022-07-12 10:18:45,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:45,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 34269 transitions. [2022-07-12 10:18:45,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 761.5333333333333) internal successors, (34269), 45 states have internal predecessors, (34269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:45,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 961.0) internal successors, (44206), 46 states have internal predecessors, (44206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:45,160 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 961.0) internal successors, (44206), 46 states have internal predecessors, (44206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:45,160 INFO L186 Difference]: Start difference. First operand has 875 places, 803 transitions, 1885 flow. Second operand 45 states and 34269 transitions. [2022-07-12 10:18:45,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 919 places, 854 transitions, 2413 flow [2022-07-12 10:18:45,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 913 places, 854 transitions, 2373 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:45,170 INFO L242 Difference]: Finished difference. Result has 922 places, 828 transitions, 2163 flow [2022-07-12 10:18:45,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2163, PETRI_PLACES=922, PETRI_TRANSITIONS=828} [2022-07-12 10:18:45,170 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 72 predicate places. [2022-07-12 10:18:45,170 INFO L495 AbstractCegarLoop]: Abstraction has has 922 places, 828 transitions, 2163 flow [2022-07-12 10:18:45,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 761.7941176470588) internal successors, (25901), 34 states have internal predecessors, (25901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:45,173 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:45,173 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:45,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:45,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:45,374 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:45,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:45,374 INFO L85 PathProgramCache]: Analyzing trace with hash -596766729, now seen corresponding path program 1 times [2022-07-12 10:18:45,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:45,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058811068] [2022-07-12 10:18:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:45,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:45,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:45,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058811068] [2022-07-12 10:18:45,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058811068] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:45,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399303681] [2022-07-12 10:18:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:45,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:45,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:45,688 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:45,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-07-12 10:18:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:46,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:46,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:46,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:47,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399303681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:47,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:47,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:47,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429463461] [2022-07-12 10:18:47,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:47,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:47,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:47,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:47,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:47,190 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-12 10:18:47,204 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 922 places, 828 transitions, 2163 flow. Second operand has 66 states, 66 states have (on average 761.8939393939394) internal successors, (50285), 66 states have internal predecessors, (50285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:47,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:47,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-12 10:18:47,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:48,978 INFO L129 PetriNetUnfolder]: 0/1010 cut-off events. [2022-07-12 10:18:48,978 INFO L130 PetriNetUnfolder]: For 1740/1740 co-relation queries the response was YES. [2022-07-12 10:18:48,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1725 conditions, 1010 events. 0/1010 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2541 event pairs, 0 based on Foata normal form. 13/1023 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2022-07-12 10:18:48,980 INFO L132 encePairwiseOnDemand]: 956/961 looper letters, 84 selfloop transitions, 82 changer transitions 0/904 dead transitions. [2022-07-12 10:18:48,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 994 places, 904 transitions, 3117 flow [2022-07-12 10:18:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-12 10:18:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-07-12 10:18:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 63935 transitions. [2022-07-12 10:18:49,004 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7920197215202418 [2022-07-12 10:18:49,004 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 63935 transitions. [2022-07-12 10:18:49,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 63935 transitions. [2022-07-12 10:18:49,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:49,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 63935 transitions. [2022-07-12 10:18:49,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 761.1309523809524) internal successors, (63935), 84 states have internal predecessors, (63935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 961.0) internal successors, (81685), 85 states have internal predecessors, (81685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,107 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 961.0) internal successors, (81685), 85 states have internal predecessors, (81685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,107 INFO L186 Difference]: Start difference. First operand has 922 places, 828 transitions, 2163 flow. Second operand 84 states and 63935 transitions. [2022-07-12 10:18:49,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 994 places, 904 transitions, 3117 flow [2022-07-12 10:18:49,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 961 places, 904 transitions, 2892 flow, removed 22 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:49,119 INFO L242 Difference]: Finished difference. Result has 961 places, 853 transitions, 2439 flow [2022-07-12 10:18:49,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=878, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=2439, PETRI_PLACES=961, PETRI_TRANSITIONS=853} [2022-07-12 10:18:49,119 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 111 predicate places. [2022-07-12 10:18:49,119 INFO L495 AbstractCegarLoop]: Abstraction has has 961 places, 853 transitions, 2439 flow [2022-07-12 10:18:49,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 761.8939393939394) internal successors, (50285), 66 states have internal predecessors, (50285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,124 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:49,124 INFO L200 CegarLoopForPetriNet]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:49,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-07-12 10:18:49,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-07-12 10:18:49,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash -98295915, now seen corresponding path program 1 times [2022-07-12 10:18:49,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:49,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220383511] [2022-07-12 10:18:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:49,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:49,363 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:49,438 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:49,438 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:49,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:49,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:49,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-07-12 10:18:49,439 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:18:49,439 WARN L231 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:49,439 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2022-07-12 10:18:49,502 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:49,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 879 places, 994 transitions, 2884 flow [2022-07-12 10:18:50,251 INFO L129 PetriNetUnfolder]: 284/1997 cut-off events. [2022-07-12 10:18:50,251 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-12 10:18:50,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2488 conditions, 1997 events. 284/1997 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7328 event pairs, 0 based on Foata normal form. 0/1655 useless extension candidates. Maximal degree in co-relation 2360. Up to 58 conditions per place. [2022-07-12 10:18:50,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 879 places, 994 transitions, 2884 flow [2022-07-12 10:18:50,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 879 places, 994 transitions, 2884 flow [2022-07-12 10:18:50,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:50,419 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:18:50,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:50,422 INFO L129 PetriNetUnfolder]: 5/80 cut-off events. [2022-07-12 10:18:50,422 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:50,422 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:50,423 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] [2022-07-12 10:18:50,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash -52084126, now seen corresponding path program 1 times [2022-07-12 10:18:50,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:50,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746376101] [2022-07-12 10:18:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:50,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:50,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:50,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746376101] [2022-07-12 10:18:50,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746376101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:50,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:50,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:50,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269514837] [2022-07-12 10:18:50,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:50,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:50,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:50,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:50,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:50,444 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 786 out of 994 [2022-07-12 10:18:50,445 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 879 places, 994 transitions, 2884 flow. Second operand has 3 states, 3 states have (on average 787.0) internal successors, (2361), 3 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:50,445 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:50,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 786 of 994 [2022-07-12 10:18:50,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:51,327 INFO L129 PetriNetUnfolder]: 0/1662 cut-off events. [2022-07-12 10:18:51,328 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-12 10:18:51,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2326 conditions, 1662 events. 0/1662 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6782 event pairs, 0 based on Foata normal form. 13605/15211 useless extension candidates. Maximal degree in co-relation 0. Up to 168 conditions per place. [2022-07-12 10:18:51,331 INFO L132 encePairwiseOnDemand]: 819/994 looper letters, 37 selfloop transitions, 2 changer transitions 11/825 dead transitions. [2022-07-12 10:18:51,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 825 transitions, 2624 flow [2022-07-12 10:18:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:51,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2577 transitions. [2022-07-12 10:18:51,333 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.864185110663984 [2022-07-12 10:18:51,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2577 transitions. [2022-07-12 10:18:51,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2577 transitions. [2022-07-12 10:18:51,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:51,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2577 transitions. [2022-07-12 10:18:51,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 859.0) internal successors, (2577), 3 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 994.0) internal successors, (3976), 4 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 994.0) internal successors, (3976), 4 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,337 INFO L186 Difference]: Start difference. First operand has 879 places, 994 transitions, 2884 flow. Second operand 3 states and 2577 transitions. [2022-07-12 10:18:51,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 825 transitions, 2624 flow [2022-07-12 10:18:51,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 880 places, 825 transitions, 1868 flow, removed 378 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:51,348 INFO L242 Difference]: Finished difference. Result has 881 places, 811 transitions, 1772 flow [2022-07-12 10:18:51,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=878, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1772, PETRI_PLACES=881, PETRI_TRANSITIONS=811} [2022-07-12 10:18:51,348 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 2 predicate places. [2022-07-12 10:18:51,348 INFO L495 AbstractCegarLoop]: Abstraction has has 881 places, 811 transitions, 1772 flow [2022-07-12 10:18:51,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 787.0) internal successors, (2361), 3 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,349 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:51,349 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] [2022-07-12 10:18:51,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-07-12 10:18:51,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:51,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1881358998, now seen corresponding path program 1 times [2022-07-12 10:18:51,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:51,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290813893] [2022-07-12 10:18:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:51,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:51,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290813893] [2022-07-12 10:18:51,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290813893] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:51,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390929129] [2022-07-12 10:18:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:51,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:51,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:51,376 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:51,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-07-12 10:18:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:51,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:51,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:52,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390929129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:52,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:52,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:52,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946047635] [2022-07-12 10:18:52,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:52,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:52,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:52,018 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-12 10:18:52,020 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 811 transitions, 1772 flow. Second operand has 10 states, 10 states have (on average 787.3) internal successors, (7873), 10 states have internal predecessors, (7873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:52,020 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:52,020 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-12 10:18:52,020 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:52,772 INFO L129 PetriNetUnfolder]: 0/1332 cut-off events. [2022-07-12 10:18:52,772 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:18:52,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 1332 events. 0/1332 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4491 event pairs, 0 based on Foata normal form. 2/1334 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-07-12 10:18:52,775 INFO L132 encePairwiseOnDemand]: 988/994 looper letters, 38 selfloop transitions, 9 changer transitions 0/821 dead transitions. [2022-07-12 10:18:52,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 878 places, 821 transitions, 1888 flow [2022-07-12 10:18:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7114 transitions. [2022-07-12 10:18:52,779 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7952157388777107 [2022-07-12 10:18:52,779 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7114 transitions. [2022-07-12 10:18:52,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7114 transitions. [2022-07-12 10:18:52,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:52,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7114 transitions. [2022-07-12 10:18:52,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 790.4444444444445) internal successors, (7114), 9 states have internal predecessors, (7114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:52,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 994.0) internal successors, (9940), 10 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:52,791 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 994.0) internal successors, (9940), 10 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:52,791 INFO L186 Difference]: Start difference. First operand has 881 places, 811 transitions, 1772 flow. Second operand 9 states and 7114 transitions. [2022-07-12 10:18:52,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 878 places, 821 transitions, 1888 flow [2022-07-12 10:18:52,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 877 places, 821 transitions, 1886 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:52,799 INFO L242 Difference]: Finished difference. Result has 880 places, 817 transitions, 1820 flow [2022-07-12 10:18:52,799 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=805, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1820, PETRI_PLACES=880, PETRI_TRANSITIONS=817} [2022-07-12 10:18:52,800 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 1 predicate places. [2022-07-12 10:18:52,800 INFO L495 AbstractCegarLoop]: Abstraction has has 880 places, 817 transitions, 1820 flow [2022-07-12 10:18:52,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 787.3) internal successors, (7873), 10 states have internal predecessors, (7873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:52,801 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:52,801 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] [2022-07-12 10:18:52,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-07-12 10:18:53,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-07-12 10:18:53,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2118794433, now seen corresponding path program 1 times [2022-07-12 10:18:53,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:53,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354967367] [2022-07-12 10:18:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:53,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:53,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354967367] [2022-07-12 10:18:53,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354967367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136726477] [2022-07-12 10:18:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:53,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:53,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:53,056 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:53,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-07-12 10:18:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:53,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:53,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:53,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:53,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136726477] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:53,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:53,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:53,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787076816] [2022-07-12 10:18:53,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:53,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:53,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:53,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:53,809 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-12 10:18:53,813 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 880 places, 817 transitions, 1820 flow. Second operand has 18 states, 18 states have (on average 787.6111111111111) internal successors, (14177), 18 states have internal predecessors, (14177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:53,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:53,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-12 10:18:53,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:54,631 INFO L129 PetriNetUnfolder]: 0/1288 cut-off events. [2022-07-12 10:18:54,631 INFO L130 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-07-12 10:18:54,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 1288 events. 0/1288 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4224 event pairs, 0 based on Foata normal form. 4/1292 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-12 10:18:54,634 INFO L132 encePairwiseOnDemand]: 988/994 looper letters, 46 selfloop transitions, 21 changer transitions 0/841 dead transitions. [2022-07-12 10:18:54,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 841 transitions, 2062 flow [2022-07-12 10:18:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16556 transitions. [2022-07-12 10:18:54,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931397911277187 [2022-07-12 10:18:54,641 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16556 transitions. [2022-07-12 10:18:54,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16556 transitions. [2022-07-12 10:18:54,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:54,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16556 transitions. [2022-07-12 10:18:54,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 788.3809523809524) internal successors, (16556), 21 states have internal predecessors, (16556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:54,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 994.0) internal successors, (21868), 22 states have internal predecessors, (21868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:54,664 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 994.0) internal successors, (21868), 22 states have internal predecessors, (21868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:54,665 INFO L186 Difference]: Start difference. First operand has 880 places, 817 transitions, 1820 flow. Second operand 21 states and 16556 transitions. [2022-07-12 10:18:54,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 841 transitions, 2062 flow [2022-07-12 10:18:54,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 899 places, 841 transitions, 2048 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:54,674 INFO L242 Difference]: Finished difference. Result has 904 places, 830 transitions, 1944 flow [2022-07-12 10:18:54,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=879, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1944, PETRI_PLACES=904, PETRI_TRANSITIONS=830} [2022-07-12 10:18:54,675 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 25 predicate places. [2022-07-12 10:18:54,675 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 830 transitions, 1944 flow [2022-07-12 10:18:54,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 787.6111111111111) internal successors, (14177), 18 states have internal predecessors, (14177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:54,676 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:54,676 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:54,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-07-12 10:18:54,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:54,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash 773674275, now seen corresponding path program 1 times [2022-07-12 10:18:54,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:54,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632399380] [2022-07-12 10:18:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:54,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:54,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:54,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632399380] [2022-07-12 10:18:54,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632399380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:54,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716087862] [2022-07-12 10:18:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:54,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:54,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:54,985 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:54,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-07-12 10:18:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:55,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:55,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716087862] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:55,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:55,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424329945] [2022-07-12 10:18:55,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:55,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:55,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:55,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:55,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:55,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-12 10:18:55,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 830 transitions, 1944 flow. Second operand has 34 states, 34 states have (on average 787.7941176470588) internal successors, (26785), 34 states have internal predecessors, (26785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:55,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:55,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-12 10:18:55,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:57,110 INFO L129 PetriNetUnfolder]: 0/1200 cut-off events. [2022-07-12 10:18:57,110 INFO L130 PetriNetUnfolder]: For 627/627 co-relation queries the response was YES. [2022-07-12 10:18:57,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1935 conditions, 1200 events. 0/1200 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3640 event pairs, 0 based on Foata normal form. 8/1208 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-12 10:18:57,112 INFO L132 encePairwiseOnDemand]: 988/994 looper letters, 62 selfloop transitions, 45 changer transitions 0/881 dead transitions. [2022-07-12 10:18:57,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 881 transitions, 2474 flow [2022-07-12 10:18:57,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 35440 transitions. [2022-07-12 10:18:57,127 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923094120277219 [2022-07-12 10:18:57,127 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 35440 transitions. [2022-07-12 10:18:57,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 35440 transitions. [2022-07-12 10:18:57,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:57,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 35440 transitions. [2022-07-12 10:18:57,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 787.5555555555555) internal successors, (35440), 45 states have internal predecessors, (35440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:57,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 994.0) internal successors, (45724), 46 states have internal predecessors, (45724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:57,191 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 994.0) internal successors, (45724), 46 states have internal predecessors, (45724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:57,191 INFO L186 Difference]: Start difference. First operand has 904 places, 830 transitions, 1944 flow. Second operand 45 states and 35440 transitions. [2022-07-12 10:18:57,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 881 transitions, 2474 flow [2022-07-12 10:18:57,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 942 places, 881 transitions, 2434 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:57,202 INFO L242 Difference]: Finished difference. Result has 951 places, 855 transitions, 2222 flow [2022-07-12 10:18:57,202 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=898, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2222, PETRI_PLACES=951, PETRI_TRANSITIONS=855} [2022-07-12 10:18:57,202 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 72 predicate places. [2022-07-12 10:18:57,203 INFO L495 AbstractCegarLoop]: Abstraction has has 951 places, 855 transitions, 2222 flow [2022-07-12 10:18:57,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 787.7941176470588) internal successors, (26785), 34 states have internal predecessors, (26785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:57,205 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:57,205 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:57,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-07-12 10:18:57,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-07-12 10:18:57,406 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:57,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:57,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1681030679, now seen corresponding path program 1 times [2022-07-12 10:18:57,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:57,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665698217] [2022-07-12 10:18:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:57,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:57,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665698217] [2022-07-12 10:18:57,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665698217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:57,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360770150] [2022-07-12 10:18:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:57,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:57,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:57,720 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:57,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-07-12 10:18:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:58,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:58,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:58,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:59,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360770150] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:59,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:59,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:59,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466873855] [2022-07-12 10:18:59,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:59,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:59,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:59,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:59,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-12 10:18:59,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 951 places, 855 transitions, 2222 flow. Second operand has 66 states, 66 states have (on average 787.8939393939394) internal successors, (52001), 66 states have internal predecessors, (52001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:59,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:59,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-12 10:18:59,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:01,175 INFO L129 PetriNetUnfolder]: 0/1046 cut-off events. [2022-07-12 10:19:01,176 INFO L130 PetriNetUnfolder]: For 1861/1861 co-relation queries the response was YES. [2022-07-12 10:19:01,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1788 conditions, 1046 events. 0/1046 cut-off events. For 1861/1861 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2639 event pairs, 0 based on Foata normal form. 14/1060 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2022-07-12 10:19:01,178 INFO L132 encePairwiseOnDemand]: 989/994 looper letters, 87 selfloop transitions, 85 changer transitions 0/936 dead transitions. [2022-07-12 10:19:01,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1026 places, 936 transitions, 3232 flow [2022-07-12 10:19:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-12 10:19:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-12 10:19:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 68481 transitions. [2022-07-12 10:19:01,206 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918892666342885 [2022-07-12 10:19:01,206 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 68481 transitions. [2022-07-12 10:19:01,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 68481 transitions. [2022-07-12 10:19:01,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:01,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 68481 transitions. [2022-07-12 10:19:01,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 787.1379310344828) internal successors, (68481), 87 states have internal predecessors, (68481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:01,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 994.0) internal successors, (87472), 88 states have internal predecessors, (87472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:01,326 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 994.0) internal successors, (87472), 88 states have internal predecessors, (87472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:01,326 INFO L186 Difference]: Start difference. First operand has 951 places, 855 transitions, 2222 flow. Second operand 87 states and 68481 transitions. [2022-07-12 10:19:01,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1026 places, 936 transitions, 3232 flow [2022-07-12 10:19:01,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 936 transitions, 2999 flow, removed 23 selfloop flow, removed 33 redundant places. [2022-07-12 10:19:01,343 INFO L242 Difference]: Finished difference. Result has 993 places, 883 transitions, 2527 flow [2022-07-12 10:19:01,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=907, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=2527, PETRI_PLACES=993, PETRI_TRANSITIONS=883} [2022-07-12 10:19:01,344 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 114 predicate places. [2022-07-12 10:19:01,344 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 883 transitions, 2527 flow [2022-07-12 10:19:01,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 787.8939393939394) internal successors, (52001), 66 states have internal predecessors, (52001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:01,350 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:01,350 INFO L200 CegarLoopForPetriNet]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:01,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:01,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:01,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1162920604, now seen corresponding path program 1 times [2022-07-12 10:19:01,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:01,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246789713] [2022-07-12 10:19:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:01,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:01,585 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:19:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:01,641 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:19:01,642 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:19:01,642 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:19:01,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:19:01,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-07-12 10:19:01,642 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:19:01,642 WARN L231 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:19:01,643 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2022-07-12 10:19:01,693 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:19:01,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 908 places, 1027 transitions, 3011 flow [2022-07-12 10:19:02,438 INFO L129 PetriNetUnfolder]: 294/2066 cut-off events. [2022-07-12 10:19:02,438 INFO L130 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2022-07-12 10:19:02,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2589 conditions, 2066 events. 294/2066 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7498 event pairs, 0 based on Foata normal form. 0/1712 useless extension candidates. Maximal degree in co-relation 2460. Up to 60 conditions per place. [2022-07-12 10:19:02,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 908 places, 1027 transitions, 3011 flow [2022-07-12 10:19:02,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 908 places, 1027 transitions, 3011 flow [2022-07-12 10:19:02,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:02,615 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:19:02,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:19:02,618 INFO L129 PetriNetUnfolder]: 2/73 cut-off events. [2022-07-12 10:19:02,618 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:19:02,618 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:02,618 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] [2022-07-12 10:19:02,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash 789082081, now seen corresponding path program 1 times [2022-07-12 10:19:02,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:02,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021904356] [2022-07-12 10:19:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:02,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:02,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021904356] [2022-07-12 10:19:02,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021904356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:02,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:02,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:19:02,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989403701] [2022-07-12 10:19:02,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:02,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:19:02,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:19:02,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:19:02,637 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 819 out of 1027 [2022-07-12 10:19:02,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 1027 transitions, 3011 flow. Second operand has 2 states, 2 states have (on average 819.5) internal successors, (1639), 2 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:02,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:02,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 819 of 1027 [2022-07-12 10:19:02,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:03,357 INFO L129 PetriNetUnfolder]: 0/1742 cut-off events. [2022-07-12 10:19:03,357 INFO L130 PetriNetUnfolder]: For 4901/4901 co-relation queries the response was YES. [2022-07-12 10:19:03,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 1742 events. 0/1742 cut-off events. For 4901/4901 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 7105 event pairs, 0 based on Foata normal form. 2564/4246 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-12 10:19:03,360 INFO L132 encePairwiseOnDemand]: 849/1027 looper letters, 29 selfloop transitions, 0 changer transitions 11/848 dead transitions. [2022-07-12 10:19:03,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 848 transitions, 2711 flow [2022-07-12 10:19:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:19:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:19:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1845 transitions. [2022-07-12 10:19:03,362 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8982473222979552 [2022-07-12 10:19:03,362 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1845 transitions. [2022-07-12 10:19:03,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1845 transitions. [2022-07-12 10:19:03,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:03,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1845 transitions. [2022-07-12 10:19:03,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 922.5) internal successors, (1845), 2 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:03,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1027.0) internal successors, (3081), 3 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:03,365 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1027.0) internal successors, (3081), 3 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:03,365 INFO L186 Difference]: Start difference. First operand has 908 places, 1027 transitions, 3011 flow. Second operand 2 states and 1845 transitions. [2022-07-12 10:19:03,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 848 transitions, 2711 flow [2022-07-12 10:19:03,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 908 places, 848 transitions, 1899 flow, removed 406 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:03,378 INFO L242 Difference]: Finished difference. Result has 908 places, 837 transitions, 1819 flow [2022-07-12 10:19:03,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=907, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1819, PETRI_PLACES=908, PETRI_TRANSITIONS=837} [2022-07-12 10:19:03,379 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 0 predicate places. [2022-07-12 10:19:03,379 INFO L495 AbstractCegarLoop]: Abstraction has has 908 places, 837 transitions, 1819 flow [2022-07-12 10:19:03,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 819.5) internal successors, (1639), 2 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:03,379 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:03,380 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] [2022-07-12 10:19:03,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-07-12 10:19:03,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:03,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1007869278, now seen corresponding path program 1 times [2022-07-12 10:19:03,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:03,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931213451] [2022-07-12 10:19:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:03,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:03,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931213451] [2022-07-12 10:19:03,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931213451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:03,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:03,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:19:03,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148493203] [2022-07-12 10:19:03,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:03,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:19:03,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:03,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:19:03,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:19:03,400 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 812 out of 1027 [2022-07-12 10:19:03,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 837 transitions, 1819 flow. Second operand has 3 states, 3 states have (on average 813.0) internal successors, (2439), 3 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:03,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:03,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 812 of 1027 [2022-07-12 10:19:03,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:04,128 INFO L129 PetriNetUnfolder]: 0/1401 cut-off events. [2022-07-12 10:19:04,128 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-12 10:19:04,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1698 conditions, 1401 events. 0/1401 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4819 event pairs, 0 based on Foata normal form. 0/1372 useless extension candidates. Maximal degree in co-relation 0. Up to 174 conditions per place. [2022-07-12 10:19:04,131 INFO L132 encePairwiseOnDemand]: 1024/1027 looper letters, 38 selfloop transitions, 2 changer transitions 0/841 dead transitions. [2022-07-12 10:19:04,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 899 places, 841 transitions, 1907 flow [2022-07-12 10:19:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:19:04,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:19:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2477 transitions. [2022-07-12 10:19:04,132 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8039597533268419 [2022-07-12 10:19:04,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2477 transitions. [2022-07-12 10:19:04,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2477 transitions. [2022-07-12 10:19:04,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:04,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2477 transitions. [2022-07-12 10:19:04,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 825.6666666666666) internal successors, (2477), 3 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:04,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1027.0) internal successors, (4108), 4 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:04,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1027.0) internal successors, (4108), 4 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:04,136 INFO L186 Difference]: Start difference. First operand has 908 places, 837 transitions, 1819 flow. Second operand 3 states and 2477 transitions. [2022-07-12 10:19:04,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 899 places, 841 transitions, 1907 flow [2022-07-12 10:19:04,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 899 places, 841 transitions, 1907 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:04,143 INFO L242 Difference]: Finished difference. Result has 900 places, 838 transitions, 1831 flow [2022-07-12 10:19:04,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=897, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1831, PETRI_PLACES=900, PETRI_TRANSITIONS=838} [2022-07-12 10:19:04,144 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, -8 predicate places. [2022-07-12 10:19:04,144 INFO L495 AbstractCegarLoop]: Abstraction has has 900 places, 838 transitions, 1831 flow [2022-07-12 10:19:04,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 813.0) internal successors, (2439), 3 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:04,144 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:04,144 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] [2022-07-12 10:19:04,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-07-12 10:19:04,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1656216362, now seen corresponding path program 1 times [2022-07-12 10:19:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:04,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329802802] [2022-07-12 10:19:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:04,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:04,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:04,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329802802] [2022-07-12 10:19:04,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329802802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:04,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792206149] [2022-07-12 10:19:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:04,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:04,170 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:04,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-07-12 10:19:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:04,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:19:04,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:04,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:04,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792206149] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:04,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:04,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:19:04,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328627206] [2022-07-12 10:19:04,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:04,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:19:04,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:19:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:19:04,839 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-12 10:19:04,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 900 places, 838 transitions, 1831 flow. Second operand has 10 states, 10 states have (on average 813.3) internal successors, (8133), 10 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:04,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:04,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-12 10:19:04,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:05,554 INFO L129 PetriNetUnfolder]: 0/1379 cut-off events. [2022-07-12 10:19:05,554 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-12 10:19:05,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1763 conditions, 1379 events. 0/1379 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4686 event pairs, 0 based on Foata normal form. 2/1381 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-07-12 10:19:05,557 INFO L132 encePairwiseOnDemand]: 1021/1027 looper letters, 39 selfloop transitions, 9 changer transitions 0/848 dead transitions. [2022-07-12 10:19:05,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 848 transitions, 1949 flow [2022-07-12 10:19:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:19:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:19:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7349 transitions. [2022-07-12 10:19:05,561 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7950881748350103 [2022-07-12 10:19:05,561 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7349 transitions. [2022-07-12 10:19:05,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7349 transitions. [2022-07-12 10:19:05,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:05,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7349 transitions. [2022-07-12 10:19:05,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 816.5555555555555) internal successors, (7349), 9 states have internal predecessors, (7349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:05,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1027.0) internal successors, (10270), 10 states have internal predecessors, (10270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:05,571 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1027.0) internal successors, (10270), 10 states have internal predecessors, (10270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:05,571 INFO L186 Difference]: Start difference. First operand has 900 places, 838 transitions, 1831 flow. Second operand 9 states and 7349 transitions. [2022-07-12 10:19:05,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 848 transitions, 1949 flow [2022-07-12 10:19:05,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 907 places, 848 transitions, 1947 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:05,580 INFO L242 Difference]: Finished difference. Result has 910 places, 844 transitions, 1879 flow [2022-07-12 10:19:05,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=899, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1879, PETRI_PLACES=910, PETRI_TRANSITIONS=844} [2022-07-12 10:19:05,580 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 2 predicate places. [2022-07-12 10:19:05,581 INFO L495 AbstractCegarLoop]: Abstraction has has 910 places, 844 transitions, 1879 flow [2022-07-12 10:19:05,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 813.3) internal successors, (8133), 10 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:05,581 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:05,581 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] [2022-07-12 10:19:05,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-07-12 10:19:05,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:05,782 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:05,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:05,782 INFO L85 PathProgramCache]: Analyzing trace with hash 37331713, now seen corresponding path program 1 times [2022-07-12 10:19:05,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:05,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781252242] [2022-07-12 10:19:05,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:05,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:05,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:05,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781252242] [2022-07-12 10:19:05,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781252242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:05,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128517752] [2022-07-12 10:19:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:05,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:05,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:05,835 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:05,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-07-12 10:19:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:06,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:19:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:06,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:06,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128517752] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:06,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:06,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:19:06,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301596850] [2022-07-12 10:19:06,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:06,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:19:06,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:06,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:19:06,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:19:06,613 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-12 10:19:06,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 910 places, 844 transitions, 1879 flow. Second operand has 18 states, 18 states have (on average 813.6111111111111) internal successors, (14645), 18 states have internal predecessors, (14645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:06,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:06,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-12 10:19:06,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:07,476 INFO L129 PetriNetUnfolder]: 0/1335 cut-off events. [2022-07-12 10:19:07,476 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-12 10:19:07,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 1335 events. 0/1335 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4374 event pairs, 0 based on Foata normal form. 4/1339 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-07-12 10:19:07,479 INFO L132 encePairwiseOnDemand]: 1021/1027 looper letters, 47 selfloop transitions, 21 changer transitions 0/868 dead transitions. [2022-07-12 10:19:07,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 868 transitions, 2123 flow [2022-07-12 10:19:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:19:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:19:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17103 transitions. [2022-07-12 10:19:07,487 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930171094728057 [2022-07-12 10:19:07,487 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17103 transitions. [2022-07-12 10:19:07,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17103 transitions. [2022-07-12 10:19:07,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:07,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17103 transitions. [2022-07-12 10:19:07,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 814.4285714285714) internal successors, (17103), 21 states have internal predecessors, (17103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:07,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1027.0) internal successors, (22594), 22 states have internal predecessors, (22594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:07,512 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1027.0) internal successors, (22594), 22 states have internal predecessors, (22594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:07,512 INFO L186 Difference]: Start difference. First operand has 910 places, 844 transitions, 1879 flow. Second operand 21 states and 17103 transitions. [2022-07-12 10:19:07,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 868 transitions, 2123 flow [2022-07-12 10:19:07,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 868 transitions, 2109 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:07,522 INFO L242 Difference]: Finished difference. Result has 934 places, 857 transitions, 2003 flow [2022-07-12 10:19:07,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=909, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=833, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2003, PETRI_PLACES=934, PETRI_TRANSITIONS=857} [2022-07-12 10:19:07,523 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 26 predicate places. [2022-07-12 10:19:07,523 INFO L495 AbstractCegarLoop]: Abstraction has has 934 places, 857 transitions, 2003 flow [2022-07-12 10:19:07,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 813.6111111111111) internal successors, (14645), 18 states have internal predecessors, (14645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:07,524 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:07,525 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:07,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-07-12 10:19:07,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-07-12 10:19:07,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:07,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2036581219, now seen corresponding path program 1 times [2022-07-12 10:19:07,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:07,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441074465] [2022-07-12 10:19:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:07,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:07,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:07,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441074465] [2022-07-12 10:19:07,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441074465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:07,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65744251] [2022-07-12 10:19:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:07,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:07,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:07,835 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:07,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-07-12 10:19:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:08,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:19:08,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:08,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:08,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65744251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:08,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:08,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:19:08,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029269088] [2022-07-12 10:19:08,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:08,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:19:08,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:08,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:19:08,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:19:08,781 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-12 10:19:08,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 934 places, 857 transitions, 2003 flow. Second operand has 34 states, 34 states have (on average 813.7941176470588) internal successors, (27669), 34 states have internal predecessors, (27669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:08,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:08,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-12 10:19:08,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:09,952 INFO L129 PetriNetUnfolder]: 0/1247 cut-off events. [2022-07-12 10:19:09,952 INFO L130 PetriNetUnfolder]: For 654/654 co-relation queries the response was YES. [2022-07-12 10:19:09,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 1247 events. 0/1247 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3798 event pairs, 0 based on Foata normal form. 8/1255 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-12 10:19:09,954 INFO L132 encePairwiseOnDemand]: 1021/1027 looper letters, 63 selfloop transitions, 45 changer transitions 0/908 dead transitions. [2022-07-12 10:19:09,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 908 transitions, 2535 flow [2022-07-12 10:19:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:19:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:19:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 36611 transitions. [2022-07-12 10:19:09,969 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921886833279238 [2022-07-12 10:19:09,969 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 36611 transitions. [2022-07-12 10:19:09,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 36611 transitions. [2022-07-12 10:19:09,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:09,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 36611 transitions. [2022-07-12 10:19:09,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 813.5777777777778) internal successors, (36611), 45 states have internal predecessors, (36611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:10,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1027.0) internal successors, (47242), 46 states have internal predecessors, (47242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:10,029 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1027.0) internal successors, (47242), 46 states have internal predecessors, (47242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:10,029 INFO L186 Difference]: Start difference. First operand has 934 places, 857 transitions, 2003 flow. Second operand 45 states and 36611 transitions. [2022-07-12 10:19:10,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 908 transitions, 2535 flow [2022-07-12 10:19:10,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 972 places, 908 transitions, 2495 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:19:10,041 INFO L242 Difference]: Finished difference. Result has 981 places, 882 transitions, 2281 flow [2022-07-12 10:19:10,041 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2281, PETRI_PLACES=981, PETRI_TRANSITIONS=882} [2022-07-12 10:19:10,041 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 73 predicate places. [2022-07-12 10:19:10,041 INFO L495 AbstractCegarLoop]: Abstraction has has 981 places, 882 transitions, 2281 flow [2022-07-12 10:19:10,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 813.7941176470588) internal successors, (27669), 34 states have internal predecessors, (27669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:10,044 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:10,044 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:10,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-07-12 10:19:10,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-07-12 10:19:10,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:10,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash -517014441, now seen corresponding path program 1 times [2022-07-12 10:19:10,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:10,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625752845] [2022-07-12 10:19:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:10,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:10,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:10,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625752845] [2022-07-12 10:19:10,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625752845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:10,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765214128] [2022-07-12 10:19:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:10,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:10,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:10,544 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:10,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-07-12 10:19:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:11,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:19:11,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:11,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:12,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765214128] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:12,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:12,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:19:12,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101599934] [2022-07-12 10:19:12,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:12,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:19:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:19:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:19:12,095 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-12 10:19:12,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 981 places, 882 transitions, 2281 flow. Second operand has 66 states, 66 states have (on average 813.8939393939394) internal successors, (53717), 66 states have internal predecessors, (53717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:12,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:12,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-12 10:19:12,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:14,098 INFO L129 PetriNetUnfolder]: 0/1082 cut-off events. [2022-07-12 10:19:14,098 INFO L130 PetriNetUnfolder]: For 1982/1982 co-relation queries the response was YES. [2022-07-12 10:19:14,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 1082 events. 0/1082 cut-off events. For 1982/1982 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2737 event pairs, 0 based on Foata normal form. 15/1097 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-12 10:19:14,100 INFO L132 encePairwiseOnDemand]: 1022/1027 looper letters, 90 selfloop transitions, 88 changer transitions 0/968 dead transitions. [2022-07-12 10:19:14,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 968 transitions, 3347 flow [2022-07-12 10:19:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-12 10:19:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-07-12 10:19:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 73183 transitions. [2022-07-12 10:19:14,130 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7917667423996538 [2022-07-12 10:19:14,130 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 73183 transitions. [2022-07-12 10:19:14,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 73183 transitions. [2022-07-12 10:19:14,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:14,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 73183 transitions. [2022-07-12 10:19:14,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 813.1444444444444) internal successors, (73183), 90 states have internal predecessors, (73183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:14,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 1027.0) internal successors, (93457), 91 states have internal predecessors, (93457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:14,375 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 1027.0) internal successors, (93457), 91 states have internal predecessors, (93457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:14,375 INFO L186 Difference]: Start difference. First operand has 981 places, 882 transitions, 2281 flow. Second operand 90 states and 73183 transitions. [2022-07-12 10:19:14,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 968 transitions, 3347 flow [2022-07-12 10:19:14,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1026 places, 968 transitions, 3106 flow, removed 24 selfloop flow, removed 33 redundant places. [2022-07-12 10:19:14,387 INFO L242 Difference]: Finished difference. Result has 1026 places, 913 transitions, 2615 flow [2022-07-12 10:19:14,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=937, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=2615, PETRI_PLACES=1026, PETRI_TRANSITIONS=913} [2022-07-12 10:19:14,387 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 118 predicate places. [2022-07-12 10:19:14,387 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 913 transitions, 2615 flow [2022-07-12 10:19:14,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 813.8939393939394) internal successors, (53717), 66 states have internal predecessors, (53717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:14,393 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:14,393 INFO L200 CegarLoopForPetriNet]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:14,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:14,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-07-12 10:19:14,594 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1024905612, now seen corresponding path program 1 times [2022-07-12 10:19:14,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:14,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269771507] [2022-07-12 10:19:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:14,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:14,632 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:19:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:14,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:19:14,694 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:19:14,695 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:19:14,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:19:14,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-07-12 10:19:14,695 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:14,695 WARN L231 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:19:14,695 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2022-07-12 10:19:14,749 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:19:14,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 937 places, 1060 transitions, 3140 flow [2022-07-12 10:19:15,551 INFO L129 PetriNetUnfolder]: 304/2135 cut-off events. [2022-07-12 10:19:15,551 INFO L130 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2022-07-12 10:19:15,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2691 conditions, 2135 events. 304/2135 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7817 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2561. Up to 62 conditions per place. [2022-07-12 10:19:15,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 937 places, 1060 transitions, 3140 flow [2022-07-12 10:19:15,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 937 places, 1060 transitions, 3140 flow [2022-07-12 10:19:15,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:15,791 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:19:15,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:19:15,794 INFO L129 PetriNetUnfolder]: 5/82 cut-off events. [2022-07-12 10:19:15,794 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:19:15,795 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:15,795 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] [2022-07-12 10:19:15,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash 460498338, now seen corresponding path program 1 times [2022-07-12 10:19:15,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:15,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458723804] [2022-07-12 10:19:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:15,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:15,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:15,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458723804] [2022-07-12 10:19:15,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458723804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:15,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:15,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:19:15,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957194982] [2022-07-12 10:19:15,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:15,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:19:15,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:15,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:19:15,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:19:15,816 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 838 out of 1060 [2022-07-12 10:19:15,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 937 places, 1060 transitions, 3140 flow. Second operand has 3 states, 3 states have (on average 839.0) internal successors, (2517), 3 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:15,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:15,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 838 of 1060 [2022-07-12 10:19:15,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:16,822 INFO L129 PetriNetUnfolder]: 0/1778 cut-off events. [2022-07-12 10:19:16,822 INFO L130 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2022-07-12 10:19:16,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 1778 events. 0/1778 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7291 event pairs, 0 based on Foata normal form. 15654/17372 useless extension candidates. Maximal degree in co-relation 0. Up to 180 conditions per place. [2022-07-12 10:19:16,825 INFO L132 encePairwiseOnDemand]: 873/1060 looper letters, 39 selfloop transitions, 2 changer transitions 11/879 dead transitions. [2022-07-12 10:19:16,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 938 places, 879 transitions, 2860 flow [2022-07-12 10:19:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:19:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:19:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2747 transitions. [2022-07-12 10:19:16,826 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8638364779874214 [2022-07-12 10:19:16,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2747 transitions. [2022-07-12 10:19:16,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2747 transitions. [2022-07-12 10:19:16,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:16,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2747 transitions. [2022-07-12 10:19:16,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 915.6666666666666) internal successors, (2747), 3 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:16,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1060.0) internal successors, (4240), 4 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:16,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1060.0) internal successors, (4240), 4 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:16,830 INFO L186 Difference]: Start difference. First operand has 937 places, 1060 transitions, 3140 flow. Second operand 3 states and 2747 transitions. [2022-07-12 10:19:16,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 938 places, 879 transitions, 2860 flow [2022-07-12 10:19:16,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 938 places, 879 transitions, 1990 flow, removed 435 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:16,843 INFO L242 Difference]: Finished difference. Result has 939 places, 865 transitions, 1890 flow [2022-07-12 10:19:16,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=873, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1890, PETRI_PLACES=939, PETRI_TRANSITIONS=865} [2022-07-12 10:19:16,844 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 2 predicate places. [2022-07-12 10:19:16,844 INFO L495 AbstractCegarLoop]: Abstraction has has 939 places, 865 transitions, 1890 flow [2022-07-12 10:19:16,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 839.0) internal successors, (2517), 3 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:16,844 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:16,845 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] [2022-07-12 10:19:16,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-07-12 10:19:16,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:16,845 INFO L85 PathProgramCache]: Analyzing trace with hash 293404278, now seen corresponding path program 1 times [2022-07-12 10:19:16,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:16,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271856908] [2022-07-12 10:19:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:16,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:16,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:16,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271856908] [2022-07-12 10:19:16,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271856908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:16,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605906155] [2022-07-12 10:19:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:16,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:16,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:16,878 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:16,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-07-12 10:19:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:19:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:17,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:17,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605906155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:17,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:17,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:19:17,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852983700] [2022-07-12 10:19:17,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:17,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:19:17,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:19:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:19:17,588 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-12 10:19:17,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 939 places, 865 transitions, 1890 flow. Second operand has 10 states, 10 states have (on average 839.3) internal successors, (8393), 10 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:17,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:17,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-12 10:19:17,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:18,414 INFO L129 PetriNetUnfolder]: 0/1426 cut-off events. [2022-07-12 10:19:18,414 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-07-12 10:19:18,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1822 conditions, 1426 events. 0/1426 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4857 event pairs, 0 based on Foata normal form. 2/1428 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-07-12 10:19:18,417 INFO L132 encePairwiseOnDemand]: 1054/1060 looper letters, 40 selfloop transitions, 9 changer transitions 0/875 dead transitions. [2022-07-12 10:19:18,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 936 places, 875 transitions, 2010 flow [2022-07-12 10:19:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:19:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:19:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7584 transitions. [2022-07-12 10:19:18,425 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7949685534591195 [2022-07-12 10:19:18,425 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7584 transitions. [2022-07-12 10:19:18,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7584 transitions. [2022-07-12 10:19:18,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:18,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7584 transitions. [2022-07-12 10:19:18,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 842.6666666666666) internal successors, (7584), 9 states have internal predecessors, (7584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:18,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1060.0) internal successors, (10600), 10 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:18,441 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1060.0) internal successors, (10600), 10 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:18,441 INFO L186 Difference]: Start difference. First operand has 939 places, 865 transitions, 1890 flow. Second operand 9 states and 7584 transitions. [2022-07-12 10:19:18,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 936 places, 875 transitions, 2010 flow [2022-07-12 10:19:18,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 935 places, 875 transitions, 2008 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:18,453 INFO L242 Difference]: Finished difference. Result has 938 places, 871 transitions, 1938 flow [2022-07-12 10:19:18,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=927, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=859, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1938, PETRI_PLACES=938, PETRI_TRANSITIONS=871} [2022-07-12 10:19:18,454 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 1 predicate places. [2022-07-12 10:19:18,454 INFO L495 AbstractCegarLoop]: Abstraction has has 938 places, 871 transitions, 1938 flow [2022-07-12 10:19:18,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 839.3) internal successors, (8393), 10 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:18,455 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:18,455 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] [2022-07-12 10:19:18,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:18,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:18,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:18,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:18,683 INFO L85 PathProgramCache]: Analyzing trace with hash -660876831, now seen corresponding path program 1 times [2022-07-12 10:19:18,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:18,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794350576] [2022-07-12 10:19:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:18,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:18,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:18,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794350576] [2022-07-12 10:19:18,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794350576] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:18,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289805728] [2022-07-12 10:19:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:18,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:18,728 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:18,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-07-12 10:19:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:19,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:19:19,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:19,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:19,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289805728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:19,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:19,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:19:19,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889616406] [2022-07-12 10:19:19,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:19,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:19:19,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:19,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:19:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:19:19,504 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-12 10:19:19,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 938 places, 871 transitions, 1938 flow. Second operand has 18 states, 18 states have (on average 839.6111111111111) internal successors, (15113), 18 states have internal predecessors, (15113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:19,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:19,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-12 10:19:19,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:20,410 INFO L129 PetriNetUnfolder]: 0/1382 cut-off events. [2022-07-12 10:19:20,410 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-12 10:19:20,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1999 conditions, 1382 events. 0/1382 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4544 event pairs, 0 based on Foata normal form. 4/1386 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-07-12 10:19:20,413 INFO L132 encePairwiseOnDemand]: 1054/1060 looper letters, 48 selfloop transitions, 21 changer transitions 0/895 dead transitions. [2022-07-12 10:19:20,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 958 places, 895 transitions, 2184 flow [2022-07-12 10:19:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:19:20,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:19:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17650 transitions. [2022-07-12 10:19:20,420 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7929020664869721 [2022-07-12 10:19:20,420 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17650 transitions. [2022-07-12 10:19:20,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17650 transitions. [2022-07-12 10:19:20,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:20,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17650 transitions. [2022-07-12 10:19:20,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 840.4761904761905) internal successors, (17650), 21 states have internal predecessors, (17650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1060.0) internal successors, (23320), 22 states have internal predecessors, (23320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,542 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1060.0) internal successors, (23320), 22 states have internal predecessors, (23320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,542 INFO L186 Difference]: Start difference. First operand has 938 places, 871 transitions, 1938 flow. Second operand 21 states and 17650 transitions. [2022-07-12 10:19:20,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 958 places, 895 transitions, 2184 flow [2022-07-12 10:19:20,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 957 places, 895 transitions, 2170 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:20,551 INFO L242 Difference]: Finished difference. Result has 962 places, 884 transitions, 2062 flow [2022-07-12 10:19:20,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=937, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2062, PETRI_PLACES=962, PETRI_TRANSITIONS=884} [2022-07-12 10:19:20,552 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 25 predicate places. [2022-07-12 10:19:20,552 INFO L495 AbstractCegarLoop]: Abstraction has has 962 places, 884 transitions, 2062 flow [2022-07-12 10:19:20,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 839.6111111111111) internal successors, (15113), 18 states have internal predecessors, (15113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:20,554 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:20,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-07-12 10:19:20,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:20,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:20,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:20,754 INFO L85 PathProgramCache]: Analyzing trace with hash 280181955, now seen corresponding path program 1 times [2022-07-12 10:19:20,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:20,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498731048] [2022-07-12 10:19:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:20,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:20,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:20,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498731048] [2022-07-12 10:19:20,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498731048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:20,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353834475] [2022-07-12 10:19:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:20,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:20,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:20,860 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:20,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-07-12 10:19:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:19:21,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:21,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:21,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353834475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:21,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:21,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:19:21,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127294515] [2022-07-12 10:19:21,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:21,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:19:21,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:21,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:19:21,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:19:21,872 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-12 10:19:21,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 962 places, 884 transitions, 2062 flow. Second operand has 34 states, 34 states have (on average 839.7941176470588) internal successors, (28553), 34 states have internal predecessors, (28553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:21,881 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-12 10:19:21,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:23,121 INFO L129 PetriNetUnfolder]: 0/1294 cut-off events. [2022-07-12 10:19:23,122 INFO L130 PetriNetUnfolder]: For 681/681 co-relation queries the response was YES. [2022-07-12 10:19:23,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 1294 events. 0/1294 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3982 event pairs, 0 based on Foata normal form. 8/1302 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-12 10:19:23,124 INFO L132 encePairwiseOnDemand]: 1054/1060 looper letters, 64 selfloop transitions, 45 changer transitions 0/935 dead transitions. [2022-07-12 10:19:23,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 935 transitions, 2596 flow [2022-07-12 10:19:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:19:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:19:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 37782 transitions. [2022-07-12 10:19:23,141 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7920754716981132 [2022-07-12 10:19:23,141 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 37782 transitions. [2022-07-12 10:19:23,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 37782 transitions. [2022-07-12 10:19:23,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:23,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 37782 transitions. [2022-07-12 10:19:23,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 839.6) internal successors, (37782), 45 states have internal predecessors, (37782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1060.0) internal successors, (48760), 46 states have internal predecessors, (48760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,205 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1060.0) internal successors, (48760), 46 states have internal predecessors, (48760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,205 INFO L186 Difference]: Start difference. First operand has 962 places, 884 transitions, 2062 flow. Second operand 45 states and 37782 transitions. [2022-07-12 10:19:23,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 935 transitions, 2596 flow [2022-07-12 10:19:23,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1000 places, 935 transitions, 2556 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:19:23,219 INFO L242 Difference]: Finished difference. Result has 1009 places, 909 transitions, 2340 flow [2022-07-12 10:19:23,219 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=956, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2340, PETRI_PLACES=1009, PETRI_TRANSITIONS=909} [2022-07-12 10:19:23,220 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 72 predicate places. [2022-07-12 10:19:23,220 INFO L495 AbstractCegarLoop]: Abstraction has has 1009 places, 909 transitions, 2340 flow [2022-07-12 10:19:23,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 839.7941176470588) internal successors, (28553), 34 states have internal predecessors, (28553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,222 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:23,223 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:23,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-07-12 10:19:23,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:23,424 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1399032503, now seen corresponding path program 1 times [2022-07-12 10:19:23,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:23,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563658526] [2022-07-12 10:19:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:23,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:23,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:23,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563658526] [2022-07-12 10:19:23,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563658526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:23,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682338233] [2022-07-12 10:19:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:23,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:23,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:23,727 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:23,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-07-12 10:19:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:19:24,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:24,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:25,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682338233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:25,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:25,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:19:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765403052] [2022-07-12 10:19:25,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:25,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:19:25,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:19:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:19:25,379 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-12 10:19:25,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1009 places, 909 transitions, 2340 flow. Second operand has 66 states, 66 states have (on average 839.8939393939394) internal successors, (55433), 66 states have internal predecessors, (55433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:25,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:25,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-12 10:19:25,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:27,544 INFO L129 PetriNetUnfolder]: 0/1118 cut-off events. [2022-07-12 10:19:27,544 INFO L130 PetriNetUnfolder]: For 2103/2103 co-relation queries the response was YES. [2022-07-12 10:19:27,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1914 conditions, 1118 events. 0/1118 cut-off events. For 2103/2103 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2835 event pairs, 0 based on Foata normal form. 16/1134 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2022-07-12 10:19:27,545 INFO L132 encePairwiseOnDemand]: 1055/1060 looper letters, 93 selfloop transitions, 91 changer transitions 0/1000 dead transitions. [2022-07-12 10:19:27,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1090 places, 1000 transitions, 3462 flow [2022-07-12 10:19:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 10:19:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-12 10:19:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 78041 transitions. [2022-07-12 10:19:27,576 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916514505984987 [2022-07-12 10:19:27,576 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 78041 transitions. [2022-07-12 10:19:27,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 78041 transitions. [2022-07-12 10:19:27,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:27,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 78041 transitions. [2022-07-12 10:19:27,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 839.1505376344086) internal successors, (78041), 93 states have internal predecessors, (78041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:27,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1060.0) internal successors, (99640), 94 states have internal predecessors, (99640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:27,706 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1060.0) internal successors, (99640), 94 states have internal predecessors, (99640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:27,707 INFO L186 Difference]: Start difference. First operand has 1009 places, 909 transitions, 2340 flow. Second operand 93 states and 78041 transitions. [2022-07-12 10:19:27,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1090 places, 1000 transitions, 3462 flow [2022-07-12 10:19:27,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1057 places, 1000 transitions, 3213 flow, removed 25 selfloop flow, removed 33 redundant places. [2022-07-12 10:19:27,718 INFO L242 Difference]: Finished difference. Result has 1057 places, 943 transitions, 2703 flow [2022-07-12 10:19:27,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=965, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=2703, PETRI_PLACES=1057, PETRI_TRANSITIONS=943} [2022-07-12 10:19:27,719 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 120 predicate places. [2022-07-12 10:19:27,719 INFO L495 AbstractCegarLoop]: Abstraction has has 1057 places, 943 transitions, 2703 flow [2022-07-12 10:19:27,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 839.8939393939394) internal successors, (55433), 66 states have internal predecessors, (55433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:27,724 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:27,725 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:27,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-07-12 10:19:27,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:27,925 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1478585189, now seen corresponding path program 1 times [2022-07-12 10:19:27,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:27,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068367803] [2022-07-12 10:19:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:27,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:27,974 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:19:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:28,058 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:19:28,058 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:19:28,058 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:19:28,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:19:28,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-07-12 10:19:28,059 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:19:28,059 WARN L231 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:19:28,059 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2022-07-12 10:19:28,126 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:19:28,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 966 places, 1093 transitions, 3271 flow [2022-07-12 10:19:29,102 INFO L129 PetriNetUnfolder]: 314/2204 cut-off events. [2022-07-12 10:19:29,103 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-12 10:19:29,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 2204 events. 314/2204 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8097 event pairs, 0 based on Foata normal form. 0/1826 useless extension candidates. Maximal degree in co-relation 2663. Up to 64 conditions per place. [2022-07-12 10:19:29,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 966 places, 1093 transitions, 3271 flow [2022-07-12 10:19:29,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 966 places, 1093 transitions, 3271 flow [2022-07-12 10:19:29,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:29,420 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:19:29,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:19:29,423 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-12 10:19:29,423 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:19:29,423 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:29,423 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] [2022-07-12 10:19:29,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:29,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:29,423 INFO L85 PathProgramCache]: Analyzing trace with hash 58051426, now seen corresponding path program 1 times [2022-07-12 10:19:29,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:29,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178575852] [2022-07-12 10:19:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:29,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:29,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178575852] [2022-07-12 10:19:29,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178575852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:29,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:29,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:19:29,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635737888] [2022-07-12 10:19:29,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:29,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:19:29,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:29,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:19:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:19:29,449 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 864 out of 1093 [2022-07-12 10:19:29,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 966 places, 1093 transitions, 3271 flow. Second operand has 3 states, 3 states have (on average 865.0) internal successors, (2595), 3 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:29,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:29,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 864 of 1093 [2022-07-12 10:19:29,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:30,443 INFO L129 PetriNetUnfolder]: 0/1836 cut-off events. [2022-07-12 10:19:30,443 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-12 10:19:30,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 1836 events. 0/1836 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7539 event pairs, 0 based on Foata normal form. 16733/18507 useless extension candidates. Maximal degree in co-relation 0. Up to 186 conditions per place. [2022-07-12 10:19:30,446 INFO L132 encePairwiseOnDemand]: 900/1093 looper letters, 40 selfloop transitions, 2 changer transitions 11/906 dead transitions. [2022-07-12 10:19:30,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 906 transitions, 2981 flow [2022-07-12 10:19:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:19:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:19:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2832 transitions. [2022-07-12 10:19:30,448 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8636779505946935 [2022-07-12 10:19:30,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2832 transitions. [2022-07-12 10:19:30,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2832 transitions. [2022-07-12 10:19:30,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:30,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2832 transitions. [2022-07-12 10:19:30,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 944.0) internal successors, (2832), 3 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:30,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1093.0) internal successors, (4372), 4 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:30,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1093.0) internal successors, (4372), 4 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:30,452 INFO L186 Difference]: Start difference. First operand has 966 places, 1093 transitions, 3271 flow. Second operand 3 states and 2832 transitions. [2022-07-12 10:19:30,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 906 transitions, 2981 flow [2022-07-12 10:19:30,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 967 places, 906 transitions, 2051 flow, removed 465 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:30,467 INFO L242 Difference]: Finished difference. Result has 968 places, 892 transitions, 1949 flow [2022-07-12 10:19:30,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=965, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=900, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1949, PETRI_PLACES=968, PETRI_TRANSITIONS=892} [2022-07-12 10:19:30,468 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 2 predicate places. [2022-07-12 10:19:30,468 INFO L495 AbstractCegarLoop]: Abstraction has has 968 places, 892 transitions, 1949 flow [2022-07-12 10:19:30,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 865.0) internal successors, (2595), 3 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:30,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:30,468 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] [2022-07-12 10:19:30,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-07-12 10:19:30,468 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:30,469 INFO L85 PathProgramCache]: Analyzing trace with hash -859713674, now seen corresponding path program 1 times [2022-07-12 10:19:30,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:30,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990468444] [2022-07-12 10:19:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:30,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:30,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:30,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990468444] [2022-07-12 10:19:30,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990468444] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:30,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768891155] [2022-07-12 10:19:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:30,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:30,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:30,502 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:30,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-07-12 10:19:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:19:31,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:31,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:31,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768891155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:31,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:31,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:19:31,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091349896] [2022-07-12 10:19:31,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:31,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:19:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:31,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:19:31,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:19:31,270 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-12 10:19:31,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 968 places, 892 transitions, 1949 flow. Second operand has 10 states, 10 states have (on average 865.3) internal successors, (8653), 10 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:31,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:31,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-12 10:19:31,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:32,130 INFO L129 PetriNetUnfolder]: 0/1473 cut-off events. [2022-07-12 10:19:32,131 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-12 10:19:32,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1882 conditions, 1473 events. 0/1473 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5031 event pairs, 0 based on Foata normal form. 2/1475 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-07-12 10:19:32,134 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 41 selfloop transitions, 9 changer transitions 0/902 dead transitions. [2022-07-12 10:19:32,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 965 places, 902 transitions, 2071 flow [2022-07-12 10:19:32,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:19:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:19:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7819 transitions. [2022-07-12 10:19:32,138 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7948561553319101 [2022-07-12 10:19:32,138 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7819 transitions. [2022-07-12 10:19:32,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7819 transitions. [2022-07-12 10:19:32,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:32,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7819 transitions. [2022-07-12 10:19:32,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 868.7777777777778) internal successors, (7819), 9 states have internal predecessors, (7819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:32,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1093.0) internal successors, (10930), 10 states have internal predecessors, (10930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:32,148 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1093.0) internal successors, (10930), 10 states have internal predecessors, (10930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:32,148 INFO L186 Difference]: Start difference. First operand has 968 places, 892 transitions, 1949 flow. Second operand 9 states and 7819 transitions. [2022-07-12 10:19:32,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 965 places, 902 transitions, 2071 flow [2022-07-12 10:19:32,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 964 places, 902 transitions, 2069 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:32,157 INFO L242 Difference]: Finished difference. Result has 967 places, 898 transitions, 1997 flow [2022-07-12 10:19:32,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=956, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=886, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1997, PETRI_PLACES=967, PETRI_TRANSITIONS=898} [2022-07-12 10:19:32,158 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 1 predicate places. [2022-07-12 10:19:32,158 INFO L495 AbstractCegarLoop]: Abstraction has has 967 places, 898 transitions, 1997 flow [2022-07-12 10:19:32,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 865.3) internal successors, (8653), 10 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:32,159 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:32,159 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] [2022-07-12 10:19:32,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:32,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-07-12 10:19:32,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:32,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:32,360 INFO L85 PathProgramCache]: Analyzing trace with hash 24168801, now seen corresponding path program 1 times [2022-07-12 10:19:32,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:32,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658249035] [2022-07-12 10:19:32,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:32,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658249035] [2022-07-12 10:19:32,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658249035] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072663571] [2022-07-12 10:19:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:32,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:32,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:32,417 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:32,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-07-12 10:19:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:33,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:19:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:33,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:33,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072663571] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:33,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:33,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:19:33,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640036640] [2022-07-12 10:19:33,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:33,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:19:33,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:19:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:19:33,265 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-12 10:19:33,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 967 places, 898 transitions, 1997 flow. Second operand has 18 states, 18 states have (on average 865.6111111111111) internal successors, (15581), 18 states have internal predecessors, (15581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:33,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:33,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-12 10:19:33,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:34,196 INFO L129 PetriNetUnfolder]: 0/1429 cut-off events. [2022-07-12 10:19:34,196 INFO L130 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-07-12 10:19:34,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2067 conditions, 1429 events. 0/1429 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4736 event pairs, 0 based on Foata normal form. 4/1433 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-07-12 10:19:34,199 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 49 selfloop transitions, 21 changer transitions 0/922 dead transitions. [2022-07-12 10:19:34,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 987 places, 922 transitions, 2245 flow [2022-07-12 10:19:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:19:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:19:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18197 transitions. [2022-07-12 10:19:34,206 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927939702871084 [2022-07-12 10:19:34,207 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18197 transitions. [2022-07-12 10:19:34,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18197 transitions. [2022-07-12 10:19:34,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:34,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18197 transitions. [2022-07-12 10:19:34,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 866.5238095238095) internal successors, (18197), 21 states have internal predecessors, (18197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:34,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1093.0) internal successors, (24046), 22 states have internal predecessors, (24046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:34,235 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1093.0) internal successors, (24046), 22 states have internal predecessors, (24046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:34,236 INFO L186 Difference]: Start difference. First operand has 967 places, 898 transitions, 1997 flow. Second operand 21 states and 18197 transitions. [2022-07-12 10:19:34,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 987 places, 922 transitions, 2245 flow [2022-07-12 10:19:34,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 986 places, 922 transitions, 2231 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:34,246 INFO L242 Difference]: Finished difference. Result has 991 places, 911 transitions, 2121 flow [2022-07-12 10:19:34,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=966, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=887, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2121, PETRI_PLACES=991, PETRI_TRANSITIONS=911} [2022-07-12 10:19:34,247 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 25 predicate places. [2022-07-12 10:19:34,247 INFO L495 AbstractCegarLoop]: Abstraction has has 991 places, 911 transitions, 2121 flow [2022-07-12 10:19:34,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 865.6111111111111) internal successors, (15581), 18 states have internal predecessors, (15581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:34,248 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:34,248 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:34,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-07-12 10:19:34,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-07-12 10:19:34,449 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:34,449 INFO L85 PathProgramCache]: Analyzing trace with hash -200556221, now seen corresponding path program 1 times [2022-07-12 10:19:34,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:34,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108497509] [2022-07-12 10:19:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:34,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:34,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:34,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108497509] [2022-07-12 10:19:34,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108497509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:34,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880463930] [2022-07-12 10:19:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:34,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:34,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:34,568 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:34,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-07-12 10:19:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:35,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:19:35,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:35,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:35,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880463930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:35,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:35,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:19:35,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359102314] [2022-07-12 10:19:35,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:35,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:19:35,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:35,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:19:35,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:19:35,619 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-12 10:19:35,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 991 places, 911 transitions, 2121 flow. Second operand has 34 states, 34 states have (on average 865.7941176470588) internal successors, (29437), 34 states have internal predecessors, (29437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:35,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:35,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-12 10:19:35,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:36,936 INFO L129 PetriNetUnfolder]: 0/1341 cut-off events. [2022-07-12 10:19:36,936 INFO L130 PetriNetUnfolder]: For 708/708 co-relation queries the response was YES. [2022-07-12 10:19:36,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2166 conditions, 1341 events. 0/1341 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4138 event pairs, 0 based on Foata normal form. 8/1349 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-12 10:19:36,938 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 65 selfloop transitions, 45 changer transitions 0/962 dead transitions. [2022-07-12 10:19:36,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 962 transitions, 2657 flow [2022-07-12 10:19:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:19:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:19:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 38953 transitions. [2022-07-12 10:19:36,954 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7919690962691878 [2022-07-12 10:19:36,954 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 38953 transitions. [2022-07-12 10:19:36,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 38953 transitions. [2022-07-12 10:19:36,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:36,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 38953 transitions. [2022-07-12 10:19:36,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 865.6222222222223) internal successors, (38953), 45 states have internal predecessors, (38953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:37,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1093.0) internal successors, (50278), 46 states have internal predecessors, (50278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:37,017 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1093.0) internal successors, (50278), 46 states have internal predecessors, (50278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:37,017 INFO L186 Difference]: Start difference. First operand has 991 places, 911 transitions, 2121 flow. Second operand 45 states and 38953 transitions. [2022-07-12 10:19:37,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 962 transitions, 2657 flow [2022-07-12 10:19:37,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1029 places, 962 transitions, 2617 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:19:37,030 INFO L242 Difference]: Finished difference. Result has 1038 places, 936 transitions, 2399 flow [2022-07-12 10:19:37,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=985, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2399, PETRI_PLACES=1038, PETRI_TRANSITIONS=936} [2022-07-12 10:19:37,030 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 72 predicate places. [2022-07-12 10:19:37,031 INFO L495 AbstractCegarLoop]: Abstraction has has 1038 places, 936 transitions, 2399 flow [2022-07-12 10:19:37,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 865.7941176470588) internal successors, (29437), 34 states have internal predecessors, (29437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:37,033 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:37,033 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:37,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-07-12 10:19:37,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-07-12 10:19:37,234 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1160763081, now seen corresponding path program 1 times [2022-07-12 10:19:37,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:37,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118815045] [2022-07-12 10:19:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:37,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118815045] [2022-07-12 10:19:37,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118815045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013585135] [2022-07-12 10:19:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:37,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:37,575 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:37,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-07-12 10:19:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:19:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:38,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:39,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013585135] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:39,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:39,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:19:39,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880658095] [2022-07-12 10:19:39,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:39,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:19:39,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:39,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:19:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:19:39,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-12 10:19:39,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1038 places, 936 transitions, 2399 flow. Second operand has 66 states, 66 states have (on average 865.8939393939394) internal successors, (57149), 66 states have internal predecessors, (57149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:39,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:39,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-12 10:19:39,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:41,564 INFO L129 PetriNetUnfolder]: 0/1165 cut-off events. [2022-07-12 10:19:41,564 INFO L130 PetriNetUnfolder]: For 2224/2224 co-relation queries the response was YES. [2022-07-12 10:19:41,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2004 conditions, 1165 events. 0/1165 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2986 event pairs, 0 based on Foata normal form. 16/1181 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2022-07-12 10:19:41,566 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 97 selfloop transitions, 93 changer transitions 0/1042 dead transitions. [2022-07-12 10:19:41,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1130 places, 1042 transitions, 3627 flow [2022-07-12 10:19:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 10:19:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-12 10:19:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 80465 transitions. [2022-07-12 10:19:41,598 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.791596572519159 [2022-07-12 10:19:41,599 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 80465 transitions. [2022-07-12 10:19:41,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 80465 transitions. [2022-07-12 10:19:41,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:41,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 80465 transitions. [2022-07-12 10:19:41,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 865.2150537634409) internal successors, (80465), 93 states have internal predecessors, (80465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:41,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1093.0) internal successors, (102742), 94 states have internal predecessors, (102742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:41,730 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1093.0) internal successors, (102742), 94 states have internal predecessors, (102742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:41,730 INFO L186 Difference]: Start difference. First operand has 1038 places, 936 transitions, 2399 flow. Second operand 93 states and 80465 transitions. [2022-07-12 10:19:41,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1130 places, 1042 transitions, 3627 flow [2022-07-12 10:19:41,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1112 places, 1042 transitions, 3539 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-12 10:19:41,746 INFO L242 Difference]: Finished difference. Result has 1129 places, 985 transitions, 3033 flow [2022-07-12 10:19:41,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=1020, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3033, PETRI_PLACES=1129, PETRI_TRANSITIONS=985} [2022-07-12 10:19:41,747 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 163 predicate places. [2022-07-12 10:19:41,747 INFO L495 AbstractCegarLoop]: Abstraction has has 1129 places, 985 transitions, 3033 flow [2022-07-12 10:19:41,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 865.8939393939394) internal successors, (57149), 66 states have internal predecessors, (57149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:41,754 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:41,754 INFO L200 CegarLoopForPetriNet]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:41,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:41,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-07-12 10:19:41,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:41,980 INFO L85 PathProgramCache]: Analyzing trace with hash 440356055, now seen corresponding path program 1 times [2022-07-12 10:19:41,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:41,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419606073] [2022-07-12 10:19:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:41,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:42,022 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:19:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:42,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:19:42,090 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:19:42,090 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:19:42,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:19:42,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-07-12 10:19:42,091 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:19:42,091 WARN L231 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:19:42,091 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2022-07-12 10:19:42,153 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:19:42,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 995 places, 1126 transitions, 3404 flow [2022-07-12 10:19:43,198 INFO L129 PetriNetUnfolder]: 324/2273 cut-off events. [2022-07-12 10:19:43,198 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-12 10:19:43,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 2273 events. 324/2273 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8327 event pairs, 0 based on Foata normal form. 0/1883 useless extension candidates. Maximal degree in co-relation 2766. Up to 66 conditions per place. [2022-07-12 10:19:43,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 995 places, 1126 transitions, 3404 flow [2022-07-12 10:19:43,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 995 places, 1126 transitions, 3404 flow [2022-07-12 10:19:43,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:43,373 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:19:43,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:19:43,376 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-12 10:19:43,376 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:19:43,376 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:43,377 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] [2022-07-12 10:19:43,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2079757282, now seen corresponding path program 1 times [2022-07-12 10:19:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:43,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650063874] [2022-07-12 10:19:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:43,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:43,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650063874] [2022-07-12 10:19:43,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650063874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:43,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:43,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:19:43,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780729369] [2022-07-12 10:19:43,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:43,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:19:43,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:19:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:19:43,400 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 890 out of 1126 [2022-07-12 10:19:43,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 995 places, 1126 transitions, 3404 flow. Second operand has 3 states, 3 states have (on average 891.0) internal successors, (2673), 3 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:43,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:43,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 890 of 1126 [2022-07-12 10:19:43,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:44,485 INFO L129 PetriNetUnfolder]: 0/1894 cut-off events. [2022-07-12 10:19:44,486 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-12 10:19:44,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2716 conditions, 1894 events. 0/1894 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7779 event pairs, 0 based on Foata normal form. 17848/19678 useless extension candidates. Maximal degree in co-relation 0. Up to 192 conditions per place. [2022-07-12 10:19:44,489 INFO L132 encePairwiseOnDemand]: 927/1126 looper letters, 41 selfloop transitions, 2 changer transitions 11/933 dead transitions. [2022-07-12 10:19:44,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 933 transitions, 3104 flow [2022-07-12 10:19:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:19:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:19:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2917 transitions. [2022-07-12 10:19:44,491 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8635287152161042 [2022-07-12 10:19:44,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2917 transitions. [2022-07-12 10:19:44,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2917 transitions. [2022-07-12 10:19:44,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:44,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2917 transitions. [2022-07-12 10:19:44,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 972.3333333333334) internal successors, (2917), 3 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:44,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 4 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:44,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 4 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:44,495 INFO L186 Difference]: Start difference. First operand has 995 places, 1126 transitions, 3404 flow. Second operand 3 states and 2917 transitions. [2022-07-12 10:19:44,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 933 transitions, 3104 flow [2022-07-12 10:19:44,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 996 places, 933 transitions, 2112 flow, removed 496 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:44,511 INFO L242 Difference]: Finished difference. Result has 997 places, 919 transitions, 2008 flow [2022-07-12 10:19:44,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=994, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=927, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2008, PETRI_PLACES=997, PETRI_TRANSITIONS=919} [2022-07-12 10:19:44,512 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 2 predicate places. [2022-07-12 10:19:44,512 INFO L495 AbstractCegarLoop]: Abstraction has has 997 places, 919 transitions, 2008 flow [2022-07-12 10:19:44,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 891.0) internal successors, (2673), 3 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:44,513 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:44,513 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] [2022-07-12 10:19:44,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-07-12 10:19:44,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:44,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:44,514 INFO L85 PathProgramCache]: Analyzing trace with hash -820602922, now seen corresponding path program 1 times [2022-07-12 10:19:44,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:44,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799611174] [2022-07-12 10:19:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:44,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:44,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799611174] [2022-07-12 10:19:44,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799611174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730024817] [2022-07-12 10:19:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:44,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:44,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:44,552 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:44,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-07-12 10:19:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:19:45,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:45,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:45,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730024817] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:45,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:45,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:19:45,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65002111] [2022-07-12 10:19:45,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:45,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:19:45,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:45,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:19:45,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:19:45,364 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-12 10:19:45,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 997 places, 919 transitions, 2008 flow. Second operand has 10 states, 10 states have (on average 891.3) internal successors, (8913), 10 states have internal predecessors, (8913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:45,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:45,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-12 10:19:45,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:46,247 INFO L129 PetriNetUnfolder]: 0/1520 cut-off events. [2022-07-12 10:19:46,248 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-12 10:19:46,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 1520 events. 0/1520 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5172 event pairs, 0 based on Foata normal form. 2/1522 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-07-12 10:19:46,250 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 42 selfloop transitions, 9 changer transitions 0/929 dead transitions. [2022-07-12 10:19:46,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 994 places, 929 transitions, 2132 flow [2022-07-12 10:19:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:19:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:19:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8054 transitions. [2022-07-12 10:19:46,254 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7947503453720149 [2022-07-12 10:19:46,254 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8054 transitions. [2022-07-12 10:19:46,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8054 transitions. [2022-07-12 10:19:46,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:46,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8054 transitions. [2022-07-12 10:19:46,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 894.8888888888889) internal successors, (8054), 9 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:46,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1126.0) internal successors, (11260), 10 states have internal predecessors, (11260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:46,264 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1126.0) internal successors, (11260), 10 states have internal predecessors, (11260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:46,264 INFO L186 Difference]: Start difference. First operand has 997 places, 919 transitions, 2008 flow. Second operand 9 states and 8054 transitions. [2022-07-12 10:19:46,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 994 places, 929 transitions, 2132 flow [2022-07-12 10:19:46,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 929 transitions, 2130 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:46,273 INFO L242 Difference]: Finished difference. Result has 996 places, 925 transitions, 2056 flow [2022-07-12 10:19:46,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=985, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2056, PETRI_PLACES=996, PETRI_TRANSITIONS=925} [2022-07-12 10:19:46,274 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 1 predicate places. [2022-07-12 10:19:46,274 INFO L495 AbstractCegarLoop]: Abstraction has has 996 places, 925 transitions, 2056 flow [2022-07-12 10:19:46,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 891.3) internal successors, (8913), 10 states have internal predecessors, (8913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:46,275 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:46,275 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] [2022-07-12 10:19:46,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:46,475 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2092468609, now seen corresponding path program 1 times [2022-07-12 10:19:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:46,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827321774] [2022-07-12 10:19:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:46,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:46,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827321774] [2022-07-12 10:19:46,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827321774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:46,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291330624] [2022-07-12 10:19:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:46,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:46,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:46,524 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:46,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-07-12 10:19:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:47,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:19:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:47,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:47,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291330624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:47,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:47,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:19:47,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923925883] [2022-07-12 10:19:47,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:47,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:19:47,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:19:47,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:19:47,412 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-12 10:19:47,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 996 places, 925 transitions, 2056 flow. Second operand has 18 states, 18 states have (on average 891.6111111111111) internal successors, (16049), 18 states have internal predecessors, (16049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:47,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:47,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-12 10:19:47,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:48,393 INFO L129 PetriNetUnfolder]: 0/1476 cut-off events. [2022-07-12 10:19:48,393 INFO L130 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-07-12 10:19:48,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 1476 events. 0/1476 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4910 event pairs, 0 based on Foata normal form. 4/1480 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-07-12 10:19:48,396 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 50 selfloop transitions, 21 changer transitions 0/949 dead transitions. [2022-07-12 10:19:48,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1016 places, 949 transitions, 2306 flow [2022-07-12 10:19:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:19:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:19:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18744 transitions. [2022-07-12 10:19:48,404 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926922100989596 [2022-07-12 10:19:48,404 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18744 transitions. [2022-07-12 10:19:48,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18744 transitions. [2022-07-12 10:19:48,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:48,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18744 transitions. [2022-07-12 10:19:48,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 892.5714285714286) internal successors, (18744), 21 states have internal predecessors, (18744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:48,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1126.0) internal successors, (24772), 22 states have internal predecessors, (24772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:48,431 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1126.0) internal successors, (24772), 22 states have internal predecessors, (24772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:48,432 INFO L186 Difference]: Start difference. First operand has 996 places, 925 transitions, 2056 flow. Second operand 21 states and 18744 transitions. [2022-07-12 10:19:48,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1016 places, 949 transitions, 2306 flow [2022-07-12 10:19:48,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1015 places, 949 transitions, 2292 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:48,442 INFO L242 Difference]: Finished difference. Result has 1020 places, 938 transitions, 2180 flow [2022-07-12 10:19:48,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=995, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2180, PETRI_PLACES=1020, PETRI_TRANSITIONS=938} [2022-07-12 10:19:48,443 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 25 predicate places. [2022-07-12 10:19:48,443 INFO L495 AbstractCegarLoop]: Abstraction has has 1020 places, 938 transitions, 2180 flow [2022-07-12 10:19:48,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 891.6111111111111) internal successors, (16049), 18 states have internal predecessors, (16049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:48,444 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:48,444 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:48,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-07-12 10:19:48,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:48,645 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash 594366691, now seen corresponding path program 1 times [2022-07-12 10:19:48,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:48,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817503617] [2022-07-12 10:19:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:48,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:48,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817503617] [2022-07-12 10:19:48,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817503617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:48,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800276727] [2022-07-12 10:19:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:48,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:48,763 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:48,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-07-12 10:19:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:49,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:19:49,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:49,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:49,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800276727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:49,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:49,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:19:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350467983] [2022-07-12 10:19:49,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:49,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:19:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:19:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:19:49,856 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-12 10:19:49,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1020 places, 938 transitions, 2180 flow. Second operand has 34 states, 34 states have (on average 891.7941176470588) internal successors, (30321), 34 states have internal predecessors, (30321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:49,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:49,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-12 10:19:49,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:51,110 INFO L129 PetriNetUnfolder]: 0/1388 cut-off events. [2022-07-12 10:19:51,110 INFO L130 PetriNetUnfolder]: For 735/735 co-relation queries the response was YES. [2022-07-12 10:19:51,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2243 conditions, 1388 events. 0/1388 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4321 event pairs, 0 based on Foata normal form. 8/1396 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-12 10:19:51,112 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 66 selfloop transitions, 45 changer transitions 0/989 dead transitions. [2022-07-12 10:19:51,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1064 places, 989 transitions, 2718 flow [2022-07-12 10:19:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:19:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:19:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 40124 transitions. [2022-07-12 10:19:51,128 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918689559897375 [2022-07-12 10:19:51,128 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 40124 transitions. [2022-07-12 10:19:51,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 40124 transitions. [2022-07-12 10:19:51,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:51,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 40124 transitions. [2022-07-12 10:19:51,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 891.6444444444444) internal successors, (40124), 45 states have internal predecessors, (40124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:51,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1126.0) internal successors, (51796), 46 states have internal predecessors, (51796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:51,193 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1126.0) internal successors, (51796), 46 states have internal predecessors, (51796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:51,193 INFO L186 Difference]: Start difference. First operand has 1020 places, 938 transitions, 2180 flow. Second operand 45 states and 40124 transitions. [2022-07-12 10:19:51,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1064 places, 989 transitions, 2718 flow [2022-07-12 10:19:51,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1058 places, 989 transitions, 2678 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:19:51,205 INFO L242 Difference]: Finished difference. Result has 1067 places, 963 transitions, 2458 flow [2022-07-12 10:19:51,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=1014, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2458, PETRI_PLACES=1067, PETRI_TRANSITIONS=963} [2022-07-12 10:19:51,205 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 72 predicate places. [2022-07-12 10:19:51,205 INFO L495 AbstractCegarLoop]: Abstraction has has 1067 places, 963 transitions, 2458 flow [2022-07-12 10:19:51,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 891.7941176470588) internal successors, (30321), 34 states have internal predecessors, (30321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:51,209 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:51,210 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:51,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:51,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:51,410 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:51,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:51,410 INFO L85 PathProgramCache]: Analyzing trace with hash 393533399, now seen corresponding path program 1 times [2022-07-12 10:19:51,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:51,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043549268] [2022-07-12 10:19:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:51,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:51,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:51,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043549268] [2022-07-12 10:19:51,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043549268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:51,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739289950] [2022-07-12 10:19:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:51,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:51,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:51,714 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:51,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-07-12 10:19:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:52,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:19:52,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:52,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:53,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739289950] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:53,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:53,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:19:53,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441635170] [2022-07-12 10:19:53,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:53,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:19:53,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:19:53,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:19:53,414 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-12 10:19:53,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1067 places, 963 transitions, 2458 flow. Second operand has 66 states, 66 states have (on average 891.8939393939394) internal successors, (58865), 66 states have internal predecessors, (58865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:53,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:53,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-12 10:19:53,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:55,681 INFO L129 PetriNetUnfolder]: 0/1212 cut-off events. [2022-07-12 10:19:55,681 INFO L130 PetriNetUnfolder]: For 2345/2345 co-relation queries the response was YES. [2022-07-12 10:19:55,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 1212 events. 0/1212 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3158 event pairs, 0 based on Foata normal form. 16/1228 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-12 10:19:55,683 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 98 selfloop transitions, 93 changer transitions 0/1069 dead transitions. [2022-07-12 10:19:55,683 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1159 places, 1069 transitions, 3688 flow [2022-07-12 10:19:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 10:19:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-12 10:19:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 82884 transitions. [2022-07-12 10:19:55,816 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7914971638113791 [2022-07-12 10:19:55,816 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 82884 transitions. [2022-07-12 10:19:55,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 82884 transitions. [2022-07-12 10:19:55,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:55,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 82884 transitions. [2022-07-12 10:19:55,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 891.2258064516129) internal successors, (82884), 93 states have internal predecessors, (82884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:55,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1126.0) internal successors, (105844), 94 states have internal predecessors, (105844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:55,954 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1126.0) internal successors, (105844), 94 states have internal predecessors, (105844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:55,954 INFO L186 Difference]: Start difference. First operand has 1067 places, 963 transitions, 2458 flow. Second operand 93 states and 82884 transitions. [2022-07-12 10:19:55,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1159 places, 1069 transitions, 3688 flow [2022-07-12 10:19:55,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1141 places, 1069 transitions, 3600 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-12 10:19:55,967 INFO L242 Difference]: Finished difference. Result has 1158 places, 1012 transitions, 3092 flow [2022-07-12 10:19:55,968 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=1049, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3092, PETRI_PLACES=1158, PETRI_TRANSITIONS=1012} [2022-07-12 10:19:55,968 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 163 predicate places. [2022-07-12 10:19:55,968 INFO L495 AbstractCegarLoop]: Abstraction has has 1158 places, 1012 transitions, 3092 flow [2022-07-12 10:19:55,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 891.8939393939394) internal successors, (58865), 66 states have internal predecessors, (58865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:55,974 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:55,974 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:55,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-07-12 10:19:56,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-07-12 10:19:56,175 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:56,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:56,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1540818559, now seen corresponding path program 1 times [2022-07-12 10:19:56,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:56,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711043377] [2022-07-12 10:19:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:56,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:57,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711043377] [2022-07-12 10:19:57,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711043377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489612336] [2022-07-12 10:19:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:57,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:57,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:57,216 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:57,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-07-12 10:19:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:58,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-12 10:19:58,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:58,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:00,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489612336] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:00,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:00,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-12 10:20:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791143432] [2022-07-12 10:20:00,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:00,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-12 10:20:00,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:00,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-12 10:20:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-12 10:20:01,029 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-12 10:20:01,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1158 places, 1012 transitions, 3092 flow. Second operand has 130 states, 130 states have (on average 891.9461538461538) internal successors, (115953), 130 states have internal predecessors, (115953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:01,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:01,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-12 10:20:01,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:03,870 INFO L129 PetriNetUnfolder]: 0/1190 cut-off events. [2022-07-12 10:20:03,870 INFO L130 PetriNetUnfolder]: For 1692/1692 co-relation queries the response was YES. [2022-07-12 10:20:03,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 1190 events. 0/1190 cut-off events. For 1692/1692 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3031 event pairs, 0 based on Foata normal form. 2/1192 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-12 10:20:03,872 INFO L132 encePairwiseOnDemand]: 1121/1126 looper letters, 99 selfloop transitions, 97 changer transitions 0/1064 dead transitions. [2022-07-12 10:20:03,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1245 places, 1064 transitions, 3872 flow [2022-07-12 10:20:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-12 10:20:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-07-12 10:20:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 88209 transitions. [2022-07-12 10:20:03,926 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912966252220248 [2022-07-12 10:20:03,927 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 88209 transitions. [2022-07-12 10:20:03,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 88209 transitions. [2022-07-12 10:20:03,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:03,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 88209 transitions. [2022-07-12 10:20:04,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 891.0) internal successors, (88209), 99 states have internal predecessors, (88209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:04,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 1126.0) internal successors, (112600), 100 states have internal predecessors, (112600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:04,083 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 1126.0) internal successors, (112600), 100 states have internal predecessors, (112600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:04,083 INFO L186 Difference]: Start difference. First operand has 1158 places, 1012 transitions, 3092 flow. Second operand 99 states and 88209 transitions. [2022-07-12 10:20:04,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1245 places, 1064 transitions, 3872 flow [2022-07-12 10:20:04,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1172 places, 1064 transitions, 3540 flow, removed 19 selfloop flow, removed 73 redundant places. [2022-07-12 10:20:04,098 INFO L242 Difference]: Finished difference. Result has 1172 places, 1004 transitions, 2970 flow [2022-07-12 10:20:04,099 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=1074, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=2970, PETRI_PLACES=1172, PETRI_TRANSITIONS=1004} [2022-07-12 10:20:04,099 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 177 predicate places. [2022-07-12 10:20:04,099 INFO L495 AbstractCegarLoop]: Abstraction has has 1172 places, 1004 transitions, 2970 flow [2022-07-12 10:20:04,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 891.9461538461538) internal successors, (115953), 130 states have internal predecessors, (115953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:04,111 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:04,111 INFO L200 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:04,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-07-12 10:20:04,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:04,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2144471914, now seen corresponding path program 1 times [2022-07-12 10:20:04,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:04,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360350761] [2022-07-12 10:20:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:20:04,356 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:20:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:20:04,456 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:20:04,456 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:20:04,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:20:04,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:20:04,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-07-12 10:20:04,457 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:04,457 WARN L231 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:20:04,457 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2022-07-12 10:20:04,520 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:20:04,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1024 places, 1159 transitions, 3539 flow [2022-07-12 10:20:05,699 INFO L129 PetriNetUnfolder]: 334/2342 cut-off events. [2022-07-12 10:20:05,699 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-12 10:20:05,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 2342 events. 334/2342 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8561 event pairs, 0 based on Foata normal form. 0/1940 useless extension candidates. Maximal degree in co-relation 2870. Up to 68 conditions per place. [2022-07-12 10:20:05,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 1024 places, 1159 transitions, 3539 flow [2022-07-12 10:20:06,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1024 places, 1159 transitions, 3539 flow [2022-07-12 10:20:06,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:20:06,026 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@3f3a981e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c898d95 [2022-07-12 10:20:06,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:20:06,030 INFO L129 PetriNetUnfolder]: 3/73 cut-off events. [2022-07-12 10:20:06,030 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:20:06,030 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:06,030 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] [2022-07-12 10:20:06,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2064318686, now seen corresponding path program 1 times [2022-07-12 10:20:06,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:06,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796173585] [2022-07-12 10:20:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:06,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:06,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:06,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796173585] [2022-07-12 10:20:06,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796173585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:06,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:06,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:20:06,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744718628] [2022-07-12 10:20:06,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:06,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:20:06,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:06,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:20:06,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:20:06,062 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 916 out of 1159 [2022-07-12 10:20:06,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 1159 transitions, 3539 flow. Second operand has 3 states, 3 states have (on average 917.0) internal successors, (2751), 3 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:06,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:06,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 916 of 1159 [2022-07-12 10:20:06,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:07,166 INFO L129 PetriNetUnfolder]: 0/1952 cut-off events. [2022-07-12 10:20:07,167 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-12 10:20:07,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2816 conditions, 1952 events. 0/1952 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8083 event pairs, 0 based on Foata normal form. 18999/20885 useless extension candidates. Maximal degree in co-relation 0. Up to 198 conditions per place. [2022-07-12 10:20:07,170 INFO L132 encePairwiseOnDemand]: 954/1159 looper letters, 42 selfloop transitions, 2 changer transitions 11/960 dead transitions. [2022-07-12 10:20:07,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1025 places, 960 transitions, 3229 flow [2022-07-12 10:20:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:20:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:20:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3002 transitions. [2022-07-12 10:20:07,172 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8633879781420765 [2022-07-12 10:20:07,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3002 transitions. [2022-07-12 10:20:07,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3002 transitions. [2022-07-12 10:20:07,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:07,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3002 transitions. [2022-07-12 10:20:07,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1000.6666666666666) internal successors, (3002), 3 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:07,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1159.0) internal successors, (4636), 4 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:07,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1159.0) internal successors, (4636), 4 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:07,176 INFO L186 Difference]: Start difference. First operand has 1024 places, 1159 transitions, 3539 flow. Second operand 3 states and 3002 transitions. [2022-07-12 10:20:07,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1025 places, 960 transitions, 3229 flow [2022-07-12 10:20:07,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1025 places, 960 transitions, 2173 flow, removed 528 selfloop flow, removed 0 redundant places. [2022-07-12 10:20:07,189 INFO L242 Difference]: Finished difference. Result has 1026 places, 946 transitions, 2067 flow [2022-07-12 10:20:07,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=1023, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2067, PETRI_PLACES=1026, PETRI_TRANSITIONS=946} [2022-07-12 10:20:07,190 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 2 predicate places. [2022-07-12 10:20:07,190 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 946 transitions, 2067 flow [2022-07-12 10:20:07,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 917.0) internal successors, (2751), 3 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:07,191 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:07,191 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] [2022-07-12 10:20:07,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-07-12 10:20:07,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash 410736534, now seen corresponding path program 1 times [2022-07-12 10:20:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:07,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936991207] [2022-07-12 10:20:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:07,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936991207] [2022-07-12 10:20:07,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936991207] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147020759] [2022-07-12 10:20:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:07,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:07,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:07,227 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:20:07,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-07-12 10:20:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:08,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:20:08,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:08,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:08,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147020759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:08,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:08,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:20:08,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067873024] [2022-07-12 10:20:08,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:08,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:20:08,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:08,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:20:08,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:20:08,071 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-12 10:20:08,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1026 places, 946 transitions, 2067 flow. Second operand has 10 states, 10 states have (on average 917.3) internal successors, (9173), 10 states have internal predecessors, (9173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:08,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:08,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-12 10:20:08,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:09,001 INFO L129 PetriNetUnfolder]: 0/1567 cut-off events. [2022-07-12 10:20:09,001 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-07-12 10:20:09,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 1567 events. 0/1567 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5371 event pairs, 0 based on Foata normal form. 2/1569 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-07-12 10:20:09,004 INFO L132 encePairwiseOnDemand]: 1153/1159 looper letters, 43 selfloop transitions, 9 changer transitions 0/956 dead transitions. [2022-07-12 10:20:09,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1023 places, 956 transitions, 2193 flow [2022-07-12 10:20:09,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:20:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:20:09,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8289 transitions. [2022-07-12 10:20:09,008 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946505608283002 [2022-07-12 10:20:09,008 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8289 transitions. [2022-07-12 10:20:09,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8289 transitions. [2022-07-12 10:20:09,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:09,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8289 transitions. [2022-07-12 10:20:09,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 921.0) internal successors, (8289), 9 states have internal predecessors, (8289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:09,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1159.0) internal successors, (11590), 10 states have internal predecessors, (11590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:09,019 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1159.0) internal successors, (11590), 10 states have internal predecessors, (11590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:09,019 INFO L186 Difference]: Start difference. First operand has 1026 places, 946 transitions, 2067 flow. Second operand 9 states and 8289 transitions. [2022-07-12 10:20:09,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1023 places, 956 transitions, 2193 flow [2022-07-12 10:20:09,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1022 places, 956 transitions, 2191 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:20:09,029 INFO L242 Difference]: Finished difference. Result has 1025 places, 952 transitions, 2115 flow [2022-07-12 10:20:09,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=1014, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=940, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2115, PETRI_PLACES=1025, PETRI_TRANSITIONS=952} [2022-07-12 10:20:09,030 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 1 predicate places. [2022-07-12 10:20:09,030 INFO L495 AbstractCegarLoop]: Abstraction has has 1025 places, 952 transitions, 2115 flow [2022-07-12 10:20:09,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 917.3) internal successors, (9173), 10 states have internal predecessors, (9173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:09,031 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:09,031 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] [2022-07-12 10:20:09,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-07-12 10:20:09,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:09,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:09,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1249055297, now seen corresponding path program 1 times [2022-07-12 10:20:09,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:09,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991737829] [2022-07-12 10:20:09,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:09,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:09,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:09,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991737829] [2022-07-12 10:20:09,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991737829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:09,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044513492] [2022-07-12 10:20:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:09,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:09,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:09,284 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:20:09,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-07-12 10:20:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:10,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:20:10,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:10,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:10,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044513492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:10,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:10,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:20:10,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772679304] [2022-07-12 10:20:10,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:10,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:20:10,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:20:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:20:10,222 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-12 10:20:10,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1025 places, 952 transitions, 2115 flow. Second operand has 18 states, 18 states have (on average 917.6111111111111) internal successors, (16517), 18 states have internal predecessors, (16517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:10,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:10,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-12 10:20:10,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:11,348 INFO L129 PetriNetUnfolder]: 0/1523 cut-off events. [2022-07-12 10:20:11,349 INFO L130 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-07-12 10:20:11,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 1523 events. 0/1523 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5054 event pairs, 0 based on Foata normal form. 4/1527 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-07-12 10:20:11,353 INFO L132 encePairwiseOnDemand]: 1153/1159 looper letters, 51 selfloop transitions, 21 changer transitions 0/976 dead transitions. [2022-07-12 10:20:11,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1045 places, 976 transitions, 2367 flow [2022-07-12 10:20:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:20:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:20:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19291 transitions. [2022-07-12 10:20:11,363 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.792596244710136 [2022-07-12 10:20:11,364 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19291 transitions. [2022-07-12 10:20:11,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19291 transitions. [2022-07-12 10:20:11,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:11,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19291 transitions. [2022-07-12 10:20:11,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 918.6190476190476) internal successors, (19291), 21 states have internal predecessors, (19291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:11,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1159.0) internal successors, (25498), 22 states have internal predecessors, (25498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:11,394 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1159.0) internal successors, (25498), 22 states have internal predecessors, (25498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:11,395 INFO L186 Difference]: Start difference. First operand has 1025 places, 952 transitions, 2115 flow. Second operand 21 states and 19291 transitions. [2022-07-12 10:20:11,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1045 places, 976 transitions, 2367 flow [2022-07-12 10:20:11,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1044 places, 976 transitions, 2353 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:20:11,407 INFO L242 Difference]: Finished difference. Result has 1049 places, 965 transitions, 2239 flow [2022-07-12 10:20:11,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=1024, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=941, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2239, PETRI_PLACES=1049, PETRI_TRANSITIONS=965} [2022-07-12 10:20:11,408 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 25 predicate places. [2022-07-12 10:20:11,408 INFO L495 AbstractCegarLoop]: Abstraction has has 1049 places, 965 transitions, 2239 flow [2022-07-12 10:20:11,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 917.6111111111111) internal successors, (16517), 18 states have internal predecessors, (16517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:11,410 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:11,410 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:11,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-07-12 10:20:11,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2022-07-12 10:20:11,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1630016605, now seen corresponding path program 1 times [2022-07-12 10:20:11,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:11,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693245382] [2022-07-12 10:20:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:11,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:11,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:11,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693245382] [2022-07-12 10:20:11,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693245382] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:11,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497834608] [2022-07-12 10:20:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:11,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:11,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:11,737 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:20:11,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-07-12 10:20:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:12,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:20:12,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:12,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:12,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497834608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:12,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:12,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:20:12,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519258331] [2022-07-12 10:20:12,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:12,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:20:12,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:12,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:20:12,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:20:12,860 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-12 10:20:12,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1049 places, 965 transitions, 2239 flow. Second operand has 34 states, 34 states have (on average 917.7941176470588) internal successors, (31205), 34 states have internal predecessors, (31205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:12,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:12,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-12 10:20:12,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand