./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_28-funptr_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:33:27,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:33:27,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:33:27,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:33:27,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:33:27,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:33:27,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:33:27,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:33:27,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:33:27,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:33:27,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:33:27,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:33:27,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:33:27,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:33:27,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:33:27,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:33:27,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:33:27,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:33:27,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:33:27,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:33:27,589 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:33:27,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:33:27,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:33:27,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:33:27,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:33:27,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:33:27,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:33:27,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:33:27,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:33:27,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:33:27,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:33:27,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:33:27,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:33:27,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:33:27,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:33:27,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:33:27,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:33:27,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:33:27,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:33:27,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:33:27,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:33:27,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:33:27,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:33:27,632 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:33:27,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:33:27,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:33:27,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:33:27,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:33:27,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:33:27,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:33:27,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:33:27,634 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:33:27,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:33:27,635 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:33:27,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:33:27,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:33:27,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:33:27,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:33:27,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:33:27,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:33:27,636 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:33:27,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:33:27,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:33:27,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:33:27,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:33:27,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:33:27,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:33:27,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:33:27,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:33:27,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:33:27,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:33:27,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:33:27,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:33:27,639 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:33:27,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:33:27,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:33:27,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 [2022-07-22 21:33:27,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:33:27,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:33:27,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:33:27,881 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:33:27,882 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:33:27,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-07-22 21:33:27,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc1fcd61/eb6b98de95d54c4088a9718c3afefb28/FLAGf855a856d [2022-07-22 21:33:28,367 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:33:28,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-07-22 21:33:28,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc1fcd61/eb6b98de95d54c4088a9718c3afefb28/FLAGf855a856d [2022-07-22 21:33:28,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc1fcd61/eb6b98de95d54c4088a9718c3afefb28 [2022-07-22 21:33:28,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:33:28,679 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:33:28,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:33:28,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:33:28,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:33:28,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:33:28" (1/1) ... [2022-07-22 21:33:28,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5715f38b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:28, skipping insertion in model container [2022-07-22 21:33:28,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:33:28" (1/1) ... [2022-07-22 21:33:28,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:33:28,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:33:29,053 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_28-funptr_racefree.i[41323,41336] [2022-07-22 21:33:29,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:33:29,089 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:33:29,115 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_28-funptr_racefree.i[41323,41336] [2022-07-22 21:33:29,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:33:29,187 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:33:29,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29 WrapperNode [2022-07-22 21:33:29,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:33:29,189 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:33:29,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:33:29,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:33:29,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (1/1) ... [2022-07-22 21:33:29,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (1/1) ... [2022-07-22 21:33:29,225 INFO L137 Inliner]: procedures = 273, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2022-07-22 21:33:29,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:33:29,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:33:29,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:33:29,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:33:29,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (1/1) ... [2022-07-22 21:33:29,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (1/1) ... [2022-07-22 21:33:29,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (1/1) ... [2022-07-22 21:33:29,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (1/1) ... [2022-07-22 21:33:29,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (1/1) ... [2022-07-22 21:33:29,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (1/1) ... [2022-07-22 21:33:29,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (1/1) ... [2022-07-22 21:33:29,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:33:29,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:33:29,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:33:29,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:33:29,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (1/1) ... [2022-07-22 21:33:29,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:33:29,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:29,304 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) [2022-07-22 21:33:29,310 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 [2022-07-22 21:33:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:33:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:33:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:33:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:33:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:33:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:33:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-22 21:33:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-22 21:33:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:33:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:33:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:33:29,338 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:33:29,426 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:33:29,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:33:29,677 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:33:29,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:33:29,682 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-22 21:33:29,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:33:29 BoogieIcfgContainer [2022-07-22 21:33:29,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:33:29,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:33:29,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:33:29,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:33:29,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:33:28" (1/3) ... [2022-07-22 21:33:29,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a179720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:33:29, skipping insertion in model container [2022-07-22 21:33:29,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:29" (2/3) ... [2022-07-22 21:33:29,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a179720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:33:29, skipping insertion in model container [2022-07-22 21:33:29,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:33:29" (3/3) ... [2022-07-22 21:33:29,689 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2022-07-22 21:33:29,705 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:33:29,711 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:33:29,711 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:33:29,711 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:33:29,757 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:33:29,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 119 places, 128 transitions, 264 flow [2022-07-22 21:33:29,842 INFO L129 PetriNetUnfolder]: 17/168 cut-off events. [2022-07-22 21:33:29,842 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-22 21:33:29,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 168 events. 17/168 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 398 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 84. Up to 4 conditions per place. [2022-07-22 21:33:29,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 128 transitions, 264 flow [2022-07-22 21:33:29,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 123 transitions, 251 flow [2022-07-22 21:33:29,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:29,872 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@179796e2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3286f5de [2022-07-22 21:33:29,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:29,900 INFO L129 PetriNetUnfolder]: 4/95 cut-off events. [2022-07-22 21:33:29,900 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:29,900 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:29,901 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] [2022-07-22 21:33:29,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:29,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash 773467911, now seen corresponding path program 1 times [2022-07-22 21:33:29,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:29,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551916629] [2022-07-22 21:33:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:29,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:30,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:30,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551916629] [2022-07-22 21:33:30,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551916629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:30,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:30,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:30,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374350567] [2022-07-22 21:33:30,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:30,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:30,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:30,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:30,178 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 128 [2022-07-22 21:33:30,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:30,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 128 [2022-07-22 21:33:30,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:30,226 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2022-07-22 21:33:30,226 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:30,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 115 events. 0/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 16/128 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-22 21:33:30,228 INFO L132 encePairwiseOnDemand]: 114/128 looper letters, 8 selfloop transitions, 2 changer transitions 15/113 dead transitions. [2022-07-22 21:33:30,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 113 transitions, 251 flow [2022-07-22 21:33:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2022-07-22 21:33:30,244 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9114583333333334 [2022-07-22 21:33:30,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2022-07-22 21:33:30,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2022-07-22 21:33:30,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:30,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2022-07-22 21:33:30,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,262 INFO L186 Difference]: Start difference. First operand has 115 places, 123 transitions, 251 flow. Second operand 3 states and 350 transitions. [2022-07-22 21:33:30,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 113 transitions, 251 flow [2022-07-22 21:33:30,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 113 transitions, 251 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:30,270 INFO L242 Difference]: Finished difference. Result has 117 places, 96 transitions, 205 flow [2022-07-22 21:33:30,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=117, PETRI_TRANSITIONS=96} [2022-07-22 21:33:30,275 INFO L279 CegarLoopForPetriNet]: 115 programPoint places, 2 predicate places. [2022-07-22 21:33:30,275 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 96 transitions, 205 flow [2022-07-22 21:33:30,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,276 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:30,276 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:30,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:33:30,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:30,278 INFO L85 PathProgramCache]: Analyzing trace with hash 349975661, now seen corresponding path program 1 times [2022-07-22 21:33:30,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:30,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760496125] [2022-07-22 21:33:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:30,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:30,314 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:30,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:30,359 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:30,360 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:30,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:30,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:33:30,362 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:33:30,367 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:30,368 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:33:30,399 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:33:30,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 169 transitions, 356 flow [2022-07-22 21:33:30,435 INFO L129 PetriNetUnfolder]: 31/274 cut-off events. [2022-07-22 21:33:30,436 INFO L130 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-07-22 21:33:30,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 274 events. 31/274 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 848 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2022-07-22 21:33:30,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 169 transitions, 356 flow [2022-07-22 21:33:30,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 169 transitions, 356 flow [2022-07-22 21:33:30,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:30,446 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@179796e2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3286f5de [2022-07-22 21:33:30,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:30,463 INFO L129 PetriNetUnfolder]: 4/97 cut-off events. [2022-07-22 21:33:30,463 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:33:30,463 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:30,463 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] [2022-07-22 21:33:30,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:30,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:30,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1770099641, now seen corresponding path program 1 times [2022-07-22 21:33:30,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:30,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111971558] [2022-07-22 21:33:30,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:30,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:30,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:30,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111971558] [2022-07-22 21:33:30,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111971558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:30,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:30,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:30,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038043304] [2022-07-22 21:33:30,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:30,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:30,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:30,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:30,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:30,546 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 169 [2022-07-22 21:33:30,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 169 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:30,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 169 [2022-07-22 21:33:30,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:30,604 INFO L129 PetriNetUnfolder]: 2/222 cut-off events. [2022-07-22 21:33:30,605 INFO L130 PetriNetUnfolder]: For 32/78 co-relation queries the response was YES. [2022-07-22 21:33:30,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 222 events. 2/222 cut-off events. For 32/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 496 event pairs, 0 based on Foata normal form. 50/264 useless extension candidates. Maximal degree in co-relation 136. Up to 16 conditions per place. [2022-07-22 21:33:30,613 INFO L132 encePairwiseOnDemand]: 149/169 looper letters, 11 selfloop transitions, 2 changer transitions 21/155 dead transitions. [2022-07-22 21:33:30,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 155 transitions, 358 flow [2022-07-22 21:33:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2022-07-22 21:33:30,616 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9072978303747534 [2022-07-22 21:33:30,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2022-07-22 21:33:30,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2022-07-22 21:33:30,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:30,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2022-07-22 21:33:30,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,620 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) [2022-07-22 21:33:30,621 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) [2022-07-22 21:33:30,621 INFO L186 Difference]: Start difference. First operand has 155 places, 169 transitions, 356 flow. Second operand 3 states and 460 transitions. [2022-07-22 21:33:30,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 155 transitions, 358 flow [2022-07-22 21:33:30,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 155 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:30,626 INFO L242 Difference]: Finished difference. Result has 157 places, 131 transitions, 284 flow [2022-07-22 21:33:30,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=157, PETRI_TRANSITIONS=131} [2022-07-22 21:33:30,627 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 2 predicate places. [2022-07-22 21:33:30,628 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 131 transitions, 284 flow [2022-07-22 21:33:30,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,630 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:30,631 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:30,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:33:30,631 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:30,632 INFO L85 PathProgramCache]: Analyzing trace with hash -720853353, now seen corresponding path program 1 times [2022-07-22 21:33:30,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:30,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405505124] [2022-07-22 21:33:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:30,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:30,657 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:30,684 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:30,684 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:30,685 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:30,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:30,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:33:30,685 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:33:30,686 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:30,686 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:33:30,718 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:33:30,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 191 places, 210 transitions, 450 flow [2022-07-22 21:33:30,762 INFO L129 PetriNetUnfolder]: 50/413 cut-off events. [2022-07-22 21:33:30,762 INFO L130 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-07-22 21:33:30,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 413 events. 50/413 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1481 event pairs, 1 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 282. Up to 16 conditions per place. [2022-07-22 21:33:30,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 210 transitions, 450 flow [2022-07-22 21:33:30,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 210 transitions, 450 flow [2022-07-22 21:33:30,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:30,771 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@179796e2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3286f5de [2022-07-22 21:33:30,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:30,776 INFO L129 PetriNetUnfolder]: 4/94 cut-off events. [2022-07-22 21:33:30,776 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:33:30,776 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:30,777 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] [2022-07-22 21:33:30,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1931036359, now seen corresponding path program 1 times [2022-07-22 21:33:30,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:30,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372415613] [2022-07-22 21:33:30,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:30,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:30,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372415613] [2022-07-22 21:33:30,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372415613] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:30,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:30,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:30,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817982672] [2022-07-22 21:33:30,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:30,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:30,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:30,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:30,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 210 [2022-07-22 21:33:30,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 210 transitions, 450 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:30,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 210 [2022-07-22 21:33:30,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:30,880 INFO L129 PetriNetUnfolder]: 7/346 cut-off events. [2022-07-22 21:33:30,881 INFO L130 PetriNetUnfolder]: For 43/82 co-relation queries the response was YES. [2022-07-22 21:33:30,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 346 events. 7/346 cut-off events. For 43/82 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1079 event pairs, 1 based on Foata normal form. 139/471 useless extension candidates. Maximal degree in co-relation 250. Up to 30 conditions per place. [2022-07-22 21:33:30,884 INFO L132 encePairwiseOnDemand]: 184/210 looper letters, 12 selfloop transitions, 2 changer transitions 22/190 dead transitions. [2022-07-22 21:33:30,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 190 transitions, 444 flow [2022-07-22 21:33:30,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-07-22 21:33:30,888 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-22 21:33:30,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-07-22 21:33:30,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-07-22 21:33:30,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:30,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-07-22 21:33:30,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2022-07-22 21:33:30,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,892 INFO L186 Difference]: Start difference. First operand has 191 places, 210 transitions, 450 flow. Second operand 3 states and 567 transitions. [2022-07-22 21:33:30,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 190 transitions, 444 flow [2022-07-22 21:33:30,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 190 transitions, 444 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:30,899 INFO L242 Difference]: Finished difference. Result has 193 places, 165 transitions, 361 flow [2022-07-22 21:33:30,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=193, PETRI_TRANSITIONS=165} [2022-07-22 21:33:30,901 INFO L279 CegarLoopForPetriNet]: 191 programPoint places, 2 predicate places. [2022-07-22 21:33:30,901 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 165 transitions, 361 flow [2022-07-22 21:33:30,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:30,901 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:30,901 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:30,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:33:30,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:30,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:30,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1053079369, now seen corresponding path program 1 times [2022-07-22 21:33:30,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:30,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456307415] [2022-07-22 21:33:30,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:30,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:30,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:30,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456307415] [2022-07-22 21:33:30,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456307415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:30,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576138283] [2022-07-22 21:33:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:30,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:30,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:30,972 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) [2022-07-22 21:33:30,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:33:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:31,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:31,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:31,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576138283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:31,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:31,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:31,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686065702] [2022-07-22 21:33:31,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:31,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:31,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:31,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:31,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:31,182 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 210 [2022-07-22 21:33:31,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 165 transitions, 361 flow. Second operand has 10 states, 10 states have (on average 174.3) internal successors, (1743), 10 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:31,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 210 [2022-07-22 21:33:31,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:31,256 INFO L129 PetriNetUnfolder]: 0/186 cut-off events. [2022-07-22 21:33:31,256 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:33:31,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 186 events. 0/186 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 316 event pairs, 0 based on Foata normal form. 2/188 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-22 21:33:31,257 INFO L132 encePairwiseOnDemand]: 204/210 looper letters, 13 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2022-07-22 21:33:31,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 175 transitions, 427 flow [2022-07-22 21:33:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1572 transitions. [2022-07-22 21:33:31,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-07-22 21:33:31,260 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1572 transitions. [2022-07-22 21:33:31,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1572 transitions. [2022-07-22 21:33:31,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:31,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1572 transitions. [2022-07-22 21:33:31,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,266 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,266 INFO L186 Difference]: Start difference. First operand has 193 places, 165 transitions, 361 flow. Second operand 9 states and 1572 transitions. [2022-07-22 21:33:31,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 175 transitions, 427 flow [2022-07-22 21:33:31,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 175 transitions, 419 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:31,270 INFO L242 Difference]: Finished difference. Result has 184 places, 171 transitions, 403 flow [2022-07-22 21:33:31,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=403, PETRI_PLACES=184, PETRI_TRANSITIONS=171} [2022-07-22 21:33:31,271 INFO L279 CegarLoopForPetriNet]: 191 programPoint places, -7 predicate places. [2022-07-22 21:33:31,271 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 171 transitions, 403 flow [2022-07-22 21:33:31,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 174.3) internal successors, (1743), 10 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,272 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:31,272 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:31,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:31,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 21:33:31,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:31,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:31,491 INFO L85 PathProgramCache]: Analyzing trace with hash -707148592, now seen corresponding path program 1 times [2022-07-22 21:33:31,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:31,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145441580] [2022-07-22 21:33:31,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:31,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:31,511 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:31,547 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:31,549 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:31,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:31,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:31,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:33:31,550 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 21:33:31,551 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:31,551 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:33:31,582 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 21:33:31,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 227 places, 251 transitions, 546 flow [2022-07-22 21:33:31,649 INFO L129 PetriNetUnfolder]: 81/620 cut-off events. [2022-07-22 21:33:31,649 INFO L130 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-07-22 21:33:31,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 620 events. 81/620 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2544 event pairs, 6 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 433. Up to 32 conditions per place. [2022-07-22 21:33:31,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 251 transitions, 546 flow [2022-07-22 21:33:31,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 251 transitions, 546 flow [2022-07-22 21:33:31,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:31,665 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@179796e2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3286f5de [2022-07-22 21:33:31,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:31,670 INFO L129 PetriNetUnfolder]: 4/96 cut-off events. [2022-07-22 21:33:31,670 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:33:31,670 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:31,670 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] [2022-07-22 21:33:31,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:31,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1779389510, now seen corresponding path program 1 times [2022-07-22 21:33:31,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:31,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023893126] [2022-07-22 21:33:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:31,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:31,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:31,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023893126] [2022-07-22 21:33:31,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023893126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:31,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:31,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:33:31,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8927072] [2022-07-22 21:33:31,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:31,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:33:31,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:31,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:33:31,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:33:31,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 251 [2022-07-22 21:33:31,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 251 transitions, 546 flow. Second operand has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:31,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 251 [2022-07-22 21:33:31,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:31,760 INFO L129 PetriNetUnfolder]: 21/555 cut-off events. [2022-07-22 21:33:31,760 INFO L130 PetriNetUnfolder]: For 126/150 co-relation queries the response was YES. [2022-07-22 21:33:31,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 555 events. 21/555 cut-off events. For 126/150 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2261 event pairs, 6 based on Foata normal form. 240/769 useless extension candidates. Maximal degree in co-relation 402. Up to 37 conditions per place. [2022-07-22 21:33:31,765 INFO L132 encePairwiseOnDemand]: 222/251 looper letters, 4 selfloop transitions, 0 changer transitions 23/221 dead transitions. [2022-07-22 21:33:31,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 221 transitions, 502 flow [2022-07-22 21:33:31,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:33:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:33:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-07-22 21:33:31,767 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9223107569721115 [2022-07-22 21:33:31,767 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-07-22 21:33:31,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-07-22 21:33:31,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:31,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-07-22 21:33:31,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,770 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,770 INFO L186 Difference]: Start difference. First operand has 227 places, 251 transitions, 546 flow. Second operand 2 states and 463 transitions. [2022-07-22 21:33:31,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 221 transitions, 502 flow [2022-07-22 21:33:31,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 221 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:31,773 INFO L242 Difference]: Finished difference. Result has 227 places, 198 transitions, 428 flow [2022-07-22 21:33:31,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=428, PETRI_PLACES=227, PETRI_TRANSITIONS=198} [2022-07-22 21:33:31,774 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, 0 predicate places. [2022-07-22 21:33:31,774 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 198 transitions, 428 flow [2022-07-22 21:33:31,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,775 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:31,775 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:31,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:33:31,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:31,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1008025977, now seen corresponding path program 1 times [2022-07-22 21:33:31,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:31,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064177858] [2022-07-22 21:33:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:31,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:31,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:31,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064177858] [2022-07-22 21:33:31,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064177858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:31,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:31,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372787898] [2022-07-22 21:33:31,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:31,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:31,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:31,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:31,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:31,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 251 [2022-07-22 21:33:31,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 198 transitions, 428 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:31,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 251 [2022-07-22 21:33:31,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:31,847 INFO L129 PetriNetUnfolder]: 0/274 cut-off events. [2022-07-22 21:33:31,848 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:33:31,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 274 events. 0/274 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 764 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-22 21:33:31,849 INFO L132 encePairwiseOnDemand]: 248/251 looper letters, 13 selfloop transitions, 2 changer transitions 0/202 dead transitions. [2022-07-22 21:33:31,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 202 transitions, 466 flow [2022-07-22 21:33:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 634 transitions. [2022-07-22 21:33:31,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8419654714475432 [2022-07-22 21:33:31,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 634 transitions. [2022-07-22 21:33:31,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 634 transitions. [2022-07-22 21:33:31,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:31,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 634 transitions. [2022-07-22 21:33:31,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,853 INFO L186 Difference]: Start difference. First operand has 227 places, 198 transitions, 428 flow. Second operand 3 states and 634 transitions. [2022-07-22 21:33:31,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 202 transitions, 466 flow [2022-07-22 21:33:31,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 202 transitions, 454 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:31,856 INFO L242 Difference]: Finished difference. Result has 211 places, 199 transitions, 428 flow [2022-07-22 21:33:31,857 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=428, PETRI_PLACES=211, PETRI_TRANSITIONS=199} [2022-07-22 21:33:31,857 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, -16 predicate places. [2022-07-22 21:33:31,858 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 199 transitions, 428 flow [2022-07-22 21:33:31,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,858 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:31,858 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:31,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:33:31,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:31,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:31,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1183444336, now seen corresponding path program 1 times [2022-07-22 21:33:31,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:31,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246398529] [2022-07-22 21:33:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:31,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:31,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:31,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246398529] [2022-07-22 21:33:31,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246398529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:31,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91832195] [2022-07-22 21:33:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:31,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:31,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:31,888 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) [2022-07-22 21:33:31,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:33:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:31,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91832195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:32,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:32,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:32,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010759402] [2022-07-22 21:33:32,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:32,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:32,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:32,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:32,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:32,028 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 251 [2022-07-22 21:33:32,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 199 transitions, 428 flow. Second operand has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:32,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 251 [2022-07-22 21:33:32,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:32,114 INFO L129 PetriNetUnfolder]: 0/244 cut-off events. [2022-07-22 21:33:32,114 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:33:32,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 244 events. 0/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 572 event pairs, 0 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-22 21:33:32,115 INFO L132 encePairwiseOnDemand]: 245/251 looper letters, 14 selfloop transitions, 9 changer transitions 0/209 dead transitions. [2022-07-22 21:33:32,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 209 transitions, 496 flow [2022-07-22 21:33:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1870 transitions. [2022-07-22 21:33:32,119 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8277999114652501 [2022-07-22 21:33:32,119 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1870 transitions. [2022-07-22 21:33:32,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1870 transitions. [2022-07-22 21:33:32,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:32,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1870 transitions. [2022-07-22 21:33:32,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.77777777777777) internal successors, (1870), 9 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,126 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,126 INFO L186 Difference]: Start difference. First operand has 211 places, 199 transitions, 428 flow. Second operand 9 states and 1870 transitions. [2022-07-22 21:33:32,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 209 transitions, 496 flow [2022-07-22 21:33:32,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 209 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:32,129 INFO L242 Difference]: Finished difference. Result has 221 places, 205 transitions, 476 flow [2022-07-22 21:33:32,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=476, PETRI_PLACES=221, PETRI_TRANSITIONS=205} [2022-07-22 21:33:32,130 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, -6 predicate places. [2022-07-22 21:33:32,131 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 205 transitions, 476 flow [2022-07-22 21:33:32,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,132 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:32,132 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:32,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:32,351 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,SelfDestructingSolverStorable9 [2022-07-22 21:33:32,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:32,352 INFO L85 PathProgramCache]: Analyzing trace with hash 134031480, now seen corresponding path program 1 times [2022-07-22 21:33:32,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:32,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796506011] [2022-07-22 21:33:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:32,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:32,367 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:32,382 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:32,382 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:32,382 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:32,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:32,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:33:32,382 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:33:32,383 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:32,383 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:33:32,400 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-22 21:33:32,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 263 places, 292 transitions, 644 flow [2022-07-22 21:33:32,530 INFO L129 PetriNetUnfolder]: 140/967 cut-off events. [2022-07-22 21:33:32,530 INFO L130 PetriNetUnfolder]: For 110/115 co-relation queries the response was YES. [2022-07-22 21:33:32,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 967 events. 140/967 cut-off events. For 110/115 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4579 event pairs, 23 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 665. Up to 80 conditions per place. [2022-07-22 21:33:32,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 292 transitions, 644 flow [2022-07-22 21:33:32,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 292 transitions, 644 flow [2022-07-22 21:33:32,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:32,554 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@179796e2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3286f5de [2022-07-22 21:33:32,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:32,558 INFO L129 PetriNetUnfolder]: 4/97 cut-off events. [2022-07-22 21:33:32,558 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:33:32,559 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:32,559 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] [2022-07-22 21:33:32,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:32,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:32,559 INFO L85 PathProgramCache]: Analyzing trace with hash 790063430, now seen corresponding path program 1 times [2022-07-22 21:33:32,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:32,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932664961] [2022-07-22 21:33:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:32,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:32,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932664961] [2022-07-22 21:33:32,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932664961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:32,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:32,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:33:32,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226053870] [2022-07-22 21:33:32,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:32,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:33:32,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:32,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:33:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:33:32,574 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 292 [2022-07-22 21:33:32,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 292 transitions, 644 flow. Second operand has 2 states, 2 states have (on average 246.5) internal successors, (493), 2 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:32,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 292 [2022-07-22 21:33:32,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:32,720 INFO L129 PetriNetUnfolder]: 54/875 cut-off events. [2022-07-22 21:33:32,721 INFO L130 PetriNetUnfolder]: For 287/308 co-relation queries the response was YES. [2022-07-22 21:33:32,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 875 events. 54/875 cut-off events. For 287/308 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4171 event pairs, 23 based on Foata normal form. 563/1394 useless extension candidates. Maximal degree in co-relation 636. Up to 86 conditions per place. [2022-07-22 21:33:32,728 INFO L132 encePairwiseOnDemand]: 257/292 looper letters, 5 selfloop transitions, 0 changer transitions 24/256 dead transitions. [2022-07-22 21:33:32,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 256 transitions, 592 flow [2022-07-22 21:33:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:33:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:33:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 537 transitions. [2022-07-22 21:33:32,731 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9195205479452054 [2022-07-22 21:33:32,731 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 537 transitions. [2022-07-22 21:33:32,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 537 transitions. [2022-07-22 21:33:32,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:32,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 537 transitions. [2022-07-22 21:33:32,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 268.5) internal successors, (537), 2 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,733 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,734 INFO L186 Difference]: Start difference. First operand has 263 places, 292 transitions, 644 flow. Second operand 2 states and 537 transitions. [2022-07-22 21:33:32,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 256 transitions, 592 flow [2022-07-22 21:33:32,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 256 transitions, 592 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:32,737 INFO L242 Difference]: Finished difference. Result has 263 places, 232 transitions, 509 flow [2022-07-22 21:33:32,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=509, PETRI_PLACES=263, PETRI_TRANSITIONS=232} [2022-07-22 21:33:32,738 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, 0 predicate places. [2022-07-22 21:33:32,739 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 232 transitions, 509 flow [2022-07-22 21:33:32,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 246.5) internal successors, (493), 2 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,739 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:32,739 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] [2022-07-22 21:33:32,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:33:32,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1997352057, now seen corresponding path program 1 times [2022-07-22 21:33:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:32,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033138074] [2022-07-22 21:33:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:32,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:32,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033138074] [2022-07-22 21:33:32,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033138074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:32,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:32,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:32,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006445202] [2022-07-22 21:33:32,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:32,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:32,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:32,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:32,761 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 292 [2022-07-22 21:33:32,762 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 232 transitions, 509 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:32,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 292 [2022-07-22 21:33:32,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:32,816 INFO L129 PetriNetUnfolder]: 0/332 cut-off events. [2022-07-22 21:33:32,817 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:33:32,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 332 events. 0/332 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1017 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-22 21:33:32,818 INFO L132 encePairwiseOnDemand]: 289/292 looper letters, 14 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-07-22 21:33:32,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 236 transitions, 549 flow [2022-07-22 21:33:32,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2022-07-22 21:33:32,820 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8378995433789954 [2022-07-22 21:33:32,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2022-07-22 21:33:32,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2022-07-22 21:33:32,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:32,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2022-07-22 21:33:32,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,823 INFO L186 Difference]: Start difference. First operand has 263 places, 232 transitions, 509 flow. Second operand 3 states and 734 transitions. [2022-07-22 21:33:32,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 236 transitions, 549 flow [2022-07-22 21:33:32,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 236 transitions, 529 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:32,827 INFO L242 Difference]: Finished difference. Result has 247 places, 233 transitions, 501 flow [2022-07-22 21:33:32,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=501, PETRI_PLACES=247, PETRI_TRANSITIONS=233} [2022-07-22 21:33:32,828 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, -16 predicate places. [2022-07-22 21:33:32,828 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 233 transitions, 501 flow [2022-07-22 21:33:32,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,828 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:32,828 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:32,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:33:32,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:32,829 INFO L85 PathProgramCache]: Analyzing trace with hash 446612663, now seen corresponding path program 1 times [2022-07-22 21:33:32,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:32,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938693866] [2022-07-22 21:33:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:32,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:32,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938693866] [2022-07-22 21:33:32,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938693866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:32,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261227496] [2022-07-22 21:33:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:32,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:32,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:32,857 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) [2022-07-22 21:33:32,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:33:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:32,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:32,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261227496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:32,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:32,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:32,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859958128] [2022-07-22 21:33:32,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:32,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:32,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:32,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:32,995 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 292 [2022-07-22 21:33:32,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 233 transitions, 501 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:32,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 292 [2022-07-22 21:33:32,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:33,077 INFO L129 PetriNetUnfolder]: 0/302 cut-off events. [2022-07-22 21:33:33,077 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:33:33,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 302 events. 0/302 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 829 event pairs, 0 based on Foata normal form. 2/304 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-22 21:33:33,078 INFO L132 encePairwiseOnDemand]: 286/292 looper letters, 15 selfloop transitions, 9 changer transitions 0/243 dead transitions. [2022-07-22 21:33:33,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 243 transitions, 571 flow [2022-07-22 21:33:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2168 transitions. [2022-07-22 21:33:33,082 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8249619482496194 [2022-07-22 21:33:33,083 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2168 transitions. [2022-07-22 21:33:33,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2168 transitions. [2022-07-22 21:33:33,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:33,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2168 transitions. [2022-07-22 21:33:33,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 240.88888888888889) internal successors, (2168), 9 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 292.0) internal successors, (2920), 10 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) [2022-07-22 21:33:33,091 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 292.0) internal successors, (2920), 10 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) [2022-07-22 21:33:33,091 INFO L186 Difference]: Start difference. First operand has 247 places, 233 transitions, 501 flow. Second operand 9 states and 2168 transitions. [2022-07-22 21:33:33,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 243 transitions, 571 flow [2022-07-22 21:33:33,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 243 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:33,095 INFO L242 Difference]: Finished difference. Result has 257 places, 239 transitions, 549 flow [2022-07-22 21:33:33,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=549, PETRI_PLACES=257, PETRI_TRANSITIONS=239} [2022-07-22 21:33:33,097 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, -6 predicate places. [2022-07-22 21:33:33,097 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 239 transitions, 549 flow [2022-07-22 21:33:33,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,098 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:33,098 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:33,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:33,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:33,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1580915110, now seen corresponding path program 1 times [2022-07-22 21:33:33,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:33,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306223359] [2022-07-22 21:33:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 21:33:33,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:33,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306223359] [2022-07-22 21:33:33,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306223359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:33,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:33,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:33:33,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859176415] [2022-07-22 21:33:33,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:33,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:33:33,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:33:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:33:33,410 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 292 [2022-07-22 21:33:33,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 239 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:33,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 292 [2022-07-22 21:33:33,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:08,886 INFO L129 PetriNetUnfolder]: 110509/274479 cut-off events. [2022-07-22 21:34:08,886 INFO L130 PetriNetUnfolder]: For 2454/2454 co-relation queries the response was YES. [2022-07-22 21:34:12,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 418466 conditions, 274479 events. 110509/274479 cut-off events. For 2454/2454 co-relation queries the response was YES. Maximal size of possible extension queue 9001. Compared 4091916 event pairs, 63940 based on Foata normal form. 3875/273785 useless extension candidates. Maximal degree in co-relation 418454. Up to 88950 conditions per place. [2022-07-22 21:34:13,401 INFO L132 encePairwiseOnDemand]: 283/292 looper letters, 38 selfloop transitions, 6 changer transitions 65/318 dead transitions. [2022-07-22 21:34:13,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 318 transitions, 945 flow [2022-07-22 21:34:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:34:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:34:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1651 transitions. [2022-07-22 21:34:13,404 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8077299412915852 [2022-07-22 21:34:13,404 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1651 transitions. [2022-07-22 21:34:13,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1651 transitions. [2022-07-22 21:34:13,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:13,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1651 transitions. [2022-07-22 21:34:13,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 235.85714285714286) internal successors, (1651), 7 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:13,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:13,513 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 292.0) internal successors, (2336), 8 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:13,513 INFO L186 Difference]: Start difference. First operand has 257 places, 239 transitions, 549 flow. Second operand 7 states and 1651 transitions. [2022-07-22 21:34:13,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 318 transitions, 945 flow [2022-07-22 21:34:13,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 318 transitions, 939 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:13,523 INFO L242 Difference]: Finished difference. Result has 267 places, 244 transitions, 611 flow [2022-07-22 21:34:13,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=611, PETRI_PLACES=267, PETRI_TRANSITIONS=244} [2022-07-22 21:34:13,524 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, 4 predicate places. [2022-07-22 21:34:13,524 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 244 transitions, 611 flow [2022-07-22 21:34:13,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:13,525 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:13,525 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:13,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:34:13,525 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:13,527 INFO L85 PathProgramCache]: Analyzing trace with hash -366048529, now seen corresponding path program 1 times [2022-07-22 21:34:13,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:13,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334848902] [2022-07-22 21:34:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:13,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:13,552 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:13,587 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:13,587 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:13,588 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:13,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:13,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:34:13,588 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 21:34:13,589 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:13,589 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-22 21:34:13,610 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-22 21:34:13,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 299 places, 333 transitions, 744 flow