./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:37:25,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:37:25,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:37:25,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:37:25,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:37:25,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:37:25,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:37:25,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:37:25,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:37:25,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:37:25,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:37:25,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:37:25,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:37:25,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:37:25,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:37:25,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:37:25,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:37:25,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:37:25,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:37:25,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:37:25,585 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:37:25,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:37:25,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:37:25,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:37:25,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:37:25,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:37:25,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:37:25,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:37:25,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:37:25,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:37:25,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:37:25,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:37:25,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:37:25,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:37:25,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:37:25,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:37:25,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:37:25,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:37:25,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:37:25,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:37:25,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:37:25,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:37:25,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:37:25,622 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:37:25,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:37:25,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:37:25,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:37:25,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:37:25,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:37:25,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:37:25,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:37:25,625 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:37:25,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:37:25,625 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:37:25,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:37:25,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:37:25,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:37:25,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:37:25,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:37:25,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:37:25,626 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:37:25,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:37:25,627 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:37:25,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:37:25,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:37:25,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:37:25,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:37:25,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:37:25,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:37:25,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:37:25,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:37:25,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:37:25,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:37:25,629 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:37:25,629 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:37:25,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:37:25,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2022-07-21 08:37:25,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:37:25,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:37:25,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:37:25,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:37:25,970 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:37:25,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-07-21 08:37:26,053 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f288450/47c3f2fdf8cc46dab29101e42915e1e5/FLAGfd25b2ba1 [2022-07-21 08:37:26,562 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:37:26,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-07-21 08:37:26,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f288450/47c3f2fdf8cc46dab29101e42915e1e5/FLAGfd25b2ba1 [2022-07-21 08:37:27,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f288450/47c3f2fdf8cc46dab29101e42915e1e5 [2022-07-21 08:37:27,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:37:27,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:37:27,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:37:27,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:37:27,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:37:27,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a8233d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27, skipping insertion in model container [2022-07-21 08:37:27,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:37:27,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:37:27,418 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/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-07-21 08:37:27,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:37:27,436 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:37:27,467 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/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-07-21 08:37:27,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:37:27,520 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:37:27,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27 WrapperNode [2022-07-21 08:37:27,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:37:27,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:37:27,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:37:27,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:37:27,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,571 INFO L137 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2022-07-21 08:37:27,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:37:27,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:37:27,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:37:27,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:37:27,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:37:27,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:37:27,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:37:27,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:37:27,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (1/1) ... [2022-07-21 08:37:27,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:37:27,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:37:27,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:37:27,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:37:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-21 08:37:27,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-21 08:37:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-21 08:37:27,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-21 08:37:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:37:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:37:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:37:27,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:37:27,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:37:27,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:37:27,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:37:27,692 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:37:27,782 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:37:27,783 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:37:28,012 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:37:28,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:37:28,076 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 08:37:28,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:37:28 BoogieIcfgContainer [2022-07-21 08:37:28,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:37:28,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:37:28,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:37:28,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:37:28,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:37:27" (1/3) ... [2022-07-21 08:37:28,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ace3047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:37:28, skipping insertion in model container [2022-07-21 08:37:28,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:27" (2/3) ... [2022-07-21 08:37:28,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ace3047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:37:28, skipping insertion in model container [2022-07-21 08:37:28,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:37:28" (3/3) ... [2022-07-21 08:37:28,087 INFO L111 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2022-07-21 08:37:28,095 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:37:28,104 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:37:28,105 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:37:28,105 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:37:28,165 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:28,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 65 transitions, 140 flow [2022-07-21 08:37:28,275 INFO L129 PetriNetUnfolder]: 7/75 cut-off events. [2022-07-21 08:37:28,276 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:37:28,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 7/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 114 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2022-07-21 08:37:28,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 65 transitions, 140 flow [2022-07-21 08:37:28,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 64 transitions, 136 flow [2022-07-21 08:37:28,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:28,304 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@1b78f654, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e3e065b [2022-07-21 08:37:28,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:37:28,320 INFO L129 PetriNetUnfolder]: 4/42 cut-off events. [2022-07-21 08:37:28,320 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:37:28,321 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:28,321 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] [2022-07-21 08:37:28,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:37:28,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:28,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1602056178, now seen corresponding path program 1 times [2022-07-21 08:37:28,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:28,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945443990] [2022-07-21 08:37:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:28,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:28,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945443990] [2022-07-21 08:37:28,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945443990] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:28,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:28,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:37:28,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755228974] [2022-07-21 08:37:28,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:28,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:37:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:37:28,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:37:28,643 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 65 [2022-07-21 08:37:28,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:28,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:28,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 65 [2022-07-21 08:37:28,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:28,795 INFO L129 PetriNetUnfolder]: 56/168 cut-off events. [2022-07-21 08:37:28,795 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:37:28,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 168 events. 56/168 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 466 event pairs, 12 based on Foata normal form. 94/255 useless extension candidates. Maximal degree in co-relation 263. Up to 56 conditions per place. [2022-07-21 08:37:28,801 INFO L132 encePairwiseOnDemand]: 52/65 looper letters, 21 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2022-07-21 08:37:28,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 184 flow [2022-07-21 08:37:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:37:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 08:37:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2022-07-21 08:37:28,823 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8246153846153846 [2022-07-21 08:37:28,824 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 268 transitions. [2022-07-21 08:37:28,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 268 transitions. [2022-07-21 08:37:28,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:28,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 268 transitions. [2022-07-21 08:37:28,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.6) internal successors, (268), 5 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:28,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:28,839 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:28,841 INFO L186 Difference]: Start difference. First operand has 64 places, 64 transitions, 136 flow. Second operand 5 states and 268 transitions. [2022-07-21 08:37:28,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 184 flow [2022-07-21 08:37:28,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:37:28,847 INFO L242 Difference]: Finished difference. Result has 57 places, 51 transitions, 141 flow [2022-07-21 08:37:28,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2022-07-21 08:37:28,852 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2022-07-21 08:37:28,852 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 141 flow [2022-07-21 08:37:28,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:28,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:28,853 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] [2022-07-21 08:37:28,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:37:28,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:37:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1782947143, now seen corresponding path program 1 times [2022-07-21 08:37:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:28,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130767709] [2022-07-21 08:37:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:28,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:28,881 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:37:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:28,915 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:37:28,916 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:37:28,917 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 08:37:28,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 08:37:28,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-21 08:37:28,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 08:37:28,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:37:28,920 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:37:28,923 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:37:28,923 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:37:28,938 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:28,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 208 flow [2022-07-21 08:37:28,961 INFO L129 PetriNetUnfolder]: 10/101 cut-off events. [2022-07-21 08:37:28,961 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:37:28,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 101 events. 10/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 177 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-07-21 08:37:28,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 208 flow [2022-07-21 08:37:28,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 77 transitions, 169 flow [2022-07-21 08:37:28,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:28,966 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@1b78f654, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e3e065b [2022-07-21 08:37:28,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:37:28,970 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2022-07-21 08:37:28,970 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:37:28,970 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:28,971 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] [2022-07-21 08:37:28,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:37:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:28,972 INFO L85 PathProgramCache]: Analyzing trace with hash 90548252, now seen corresponding path program 1 times [2022-07-21 08:37:28,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:28,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059023302] [2022-07-21 08:37:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:28,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:29,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059023302] [2022-07-21 08:37:29,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059023302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:29,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:29,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:37:29,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946952229] [2022-07-21 08:37:29,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:29,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:37:29,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:29,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:37:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:37:29,025 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 92 [2022-07-21 08:37:29,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:29,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 92 [2022-07-21 08:37:29,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:29,317 INFO L129 PetriNetUnfolder]: 740/1312 cut-off events. [2022-07-21 08:37:29,317 INFO L130 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2022-07-21 08:37:29,323 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 1312 events. 740/1312 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7296 event pairs, 122 based on Foata normal form. 768/2032 useless extension candidates. Maximal degree in co-relation 2564. Up to 667 conditions per place. [2022-07-21 08:37:29,336 INFO L132 encePairwiseOnDemand]: 75/92 looper letters, 34 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2022-07-21 08:37:29,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 271 flow [2022-07-21 08:37:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:37:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 08:37:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2022-07-21 08:37:29,340 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7391304347826086 [2022-07-21 08:37:29,340 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2022-07-21 08:37:29,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2022-07-21 08:37:29,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:29,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2022-07-21 08:37:29,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,346 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,347 INFO L186 Difference]: Start difference. First operand has 77 places, 77 transitions, 169 flow. Second operand 5 states and 340 transitions. [2022-07-21 08:37:29,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 271 flow [2022-07-21 08:37:29,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 268 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-21 08:37:29,351 INFO L242 Difference]: Finished difference. Result has 67 places, 63 transitions, 186 flow [2022-07-21 08:37:29,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2022-07-21 08:37:29,352 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2022-07-21 08:37:29,352 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 186 flow [2022-07-21 08:37:29,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,353 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:29,353 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] [2022-07-21 08:37:29,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:37:29,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:37:29,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash -965967294, now seen corresponding path program 1 times [2022-07-21 08:37:29,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:29,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356549848] [2022-07-21 08:37:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:29,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:29,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:29,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356549848] [2022-07-21 08:37:29,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356549848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:29,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:29,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:37:29,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983319523] [2022-07-21 08:37:29,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:29,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:37:29,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:37:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:37:29,454 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 92 [2022-07-21 08:37:29,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:29,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 92 [2022-07-21 08:37:29,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:29,525 INFO L129 PetriNetUnfolder]: 38/250 cut-off events. [2022-07-21 08:37:29,525 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-07-21 08:37:29,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 250 events. 38/250 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1086 event pairs, 6 based on Foata normal form. 46/295 useless extension candidates. Maximal degree in co-relation 392. Up to 50 conditions per place. [2022-07-21 08:37:29,527 INFO L132 encePairwiseOnDemand]: 86/92 looper letters, 6 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2022-07-21 08:37:29,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 210 flow [2022-07-21 08:37:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:37:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:37:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2022-07-21 08:37:29,529 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7608695652173914 [2022-07-21 08:37:29,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2022-07-21 08:37:29,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2022-07-21 08:37:29,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:29,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2022-07-21 08:37:29,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,532 INFO L186 Difference]: Start difference. First operand has 67 places, 63 transitions, 186 flow. Second operand 3 states and 210 transitions. [2022-07-21 08:37:29,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 210 flow [2022-07-21 08:37:29,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 204 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-21 08:37:29,536 INFO L242 Difference]: Finished difference. Result has 68 places, 61 transitions, 180 flow [2022-07-21 08:37:29,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-07-21 08:37:29,539 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2022-07-21 08:37:29,539 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 180 flow [2022-07-21 08:37:29,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:29,540 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] [2022-07-21 08:37:29,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:37:29,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:37:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:29,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1614490504, now seen corresponding path program 1 times [2022-07-21 08:37:29,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:29,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451781370] [2022-07-21 08:37:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:29,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:29,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:29,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451781370] [2022-07-21 08:37:29,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451781370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:29,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:29,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:37:29,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527136418] [2022-07-21 08:37:29,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:29,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:37:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:37:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:37:29,668 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 92 [2022-07-21 08:37:29,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:29,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 92 [2022-07-21 08:37:29,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:29,805 INFO L129 PetriNetUnfolder]: 91/341 cut-off events. [2022-07-21 08:37:29,805 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-07-21 08:37:29,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 341 events. 91/341 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1853 event pairs, 9 based on Foata normal form. 3/337 useless extension candidates. Maximal degree in co-relation 906. Up to 145 conditions per place. [2022-07-21 08:37:29,809 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 44 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2022-07-21 08:37:29,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 410 flow [2022-07-21 08:37:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:37:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 08:37:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 408 transitions. [2022-07-21 08:37:29,811 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2022-07-21 08:37:29,811 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 408 transitions. [2022-07-21 08:37:29,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 408 transitions. [2022-07-21 08:37:29,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:29,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 408 transitions. [2022-07-21 08:37:29,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.285714285714285) internal successors, (408), 7 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,815 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,815 INFO L186 Difference]: Start difference. First operand has 68 places, 61 transitions, 180 flow. Second operand 7 states and 408 transitions. [2022-07-21 08:37:29,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 410 flow [2022-07-21 08:37:29,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:37:29,819 INFO L242 Difference]: Finished difference. Result has 76 places, 69 transitions, 258 flow [2022-07-21 08:37:29,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=258, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2022-07-21 08:37:29,820 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -1 predicate places. [2022-07-21 08:37:29,820 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 258 flow [2022-07-21 08:37:29,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,820 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:29,821 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-21 08:37:29,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:37:29,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:37:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1827137551, now seen corresponding path program 1 times [2022-07-21 08:37:29,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:29,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178089424] [2022-07-21 08:37:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:29,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:29,839 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:37:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:29,859 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:37:29,859 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:37:29,860 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:37:29,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:37:29,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-21 08:37:29,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:37:29,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:37:29,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:37:29,861 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:37:29,862 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:37:29,862 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:37:29,883 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:29,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 280 flow [2022-07-21 08:37:29,896 INFO L129 PetriNetUnfolder]: 13/127 cut-off events. [2022-07-21 08:37:29,896 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:37:29,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 127 events. 13/127 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2022-07-21 08:37:29,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 280 flow [2022-07-21 08:37:29,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 90 transitions, 204 flow [2022-07-21 08:37:29,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:29,901 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@1b78f654, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e3e065b [2022-07-21 08:37:29,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:37:29,904 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2022-07-21 08:37:29,904 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:37:29,904 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:29,904 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] [2022-07-21 08:37:29,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 08:37:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1010684622, now seen corresponding path program 1 times [2022-07-21 08:37:29,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:29,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128245096] [2022-07-21 08:37:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:29,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:29,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:29,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128245096] [2022-07-21 08:37:29,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128245096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:29,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:29,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:37:29,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293563277] [2022-07-21 08:37:29,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:29,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:37:29,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:29,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:37:29,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:37:29,953 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 119 [2022-07-21 08:37:29,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:29,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:29,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 119 [2022-07-21 08:37:29,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:31,166 INFO L129 PetriNetUnfolder]: 6323/9886 cut-off events. [2022-07-21 08:37:31,167 INFO L130 PetriNetUnfolder]: For 2152/2152 co-relation queries the response was YES. [2022-07-21 08:37:31,204 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19896 conditions, 9886 events. 6323/9886 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 66023 event pairs, 1736 based on Foata normal form. 5068/14571 useless extension candidates. Maximal degree in co-relation 19863. Up to 5413 conditions per place. [2022-07-21 08:37:31,286 INFO L132 encePairwiseOnDemand]: 98/119 looper letters, 47 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2022-07-21 08:37:31,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 364 flow [2022-07-21 08:37:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:37:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 08:37:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2022-07-21 08:37:31,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.692436974789916 [2022-07-21 08:37:31,289 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2022-07-21 08:37:31,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2022-07-21 08:37:31,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:31,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2022-07-21 08:37:31,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,293 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,293 INFO L186 Difference]: Start difference. First operand has 90 places, 90 transitions, 204 flow. Second operand 5 states and 412 transitions. [2022-07-21 08:37:31,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 364 flow [2022-07-21 08:37:31,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 353 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-07-21 08:37:31,300 INFO L242 Difference]: Finished difference. Result has 77 places, 75 transitions, 231 flow [2022-07-21 08:37:31,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2022-07-21 08:37:31,301 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -13 predicate places. [2022-07-21 08:37:31,301 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 231 flow [2022-07-21 08:37:31,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,302 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:31,302 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] [2022-07-21 08:37:31,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:37:31,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 08:37:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash -156069315, now seen corresponding path program 1 times [2022-07-21 08:37:31,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:31,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735627818] [2022-07-21 08:37:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:31,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:31,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735627818] [2022-07-21 08:37:31,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735627818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:31,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:31,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:37:31,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312859170] [2022-07-21 08:37:31,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:31,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:37:31,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:31,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:37:31,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:37:31,337 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 119 [2022-07-21 08:37:31,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:31,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 119 [2022-07-21 08:37:31,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:31,428 INFO L129 PetriNetUnfolder]: 146/567 cut-off events. [2022-07-21 08:37:31,428 INFO L130 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-07-21 08:37:31,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 567 events. 146/567 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3223 event pairs, 16 based on Foata normal form. 225/787 useless extension candidates. Maximal degree in co-relation 1110. Up to 168 conditions per place. [2022-07-21 08:37:31,463 INFO L132 encePairwiseOnDemand]: 111/119 looper letters, 8 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2022-07-21 08:37:31,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 264 flow [2022-07-21 08:37:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:37:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:37:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-07-21 08:37:31,465 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7282913165266106 [2022-07-21 08:37:31,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-07-21 08:37:31,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-07-21 08:37:31,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:31,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-07-21 08:37:31,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,467 INFO L186 Difference]: Start difference. First operand has 77 places, 75 transitions, 231 flow. Second operand 3 states and 260 transitions. [2022-07-21 08:37:31,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 264 flow [2022-07-21 08:37:31,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 256 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-21 08:37:31,471 INFO L242 Difference]: Finished difference. Result has 78 places, 72 transitions, 221 flow [2022-07-21 08:37:31,472 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2022-07-21 08:37:31,473 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -12 predicate places. [2022-07-21 08:37:31,473 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 221 flow [2022-07-21 08:37:31,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,474 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:31,474 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] [2022-07-21 08:37:31,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:37:31,475 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 08:37:31,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:31,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1201091516, now seen corresponding path program 1 times [2022-07-21 08:37:31,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:31,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100707199] [2022-07-21 08:37:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:31,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:31,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:31,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100707199] [2022-07-21 08:37:31,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100707199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:31,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:31,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:37:31,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397399046] [2022-07-21 08:37:31,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:31,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:37:31,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:31,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:37:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:37:31,591 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 119 [2022-07-21 08:37:31,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:31,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 119 [2022-07-21 08:37:31,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:31,799 INFO L129 PetriNetUnfolder]: 316/963 cut-off events. [2022-07-21 08:37:31,799 INFO L130 PetriNetUnfolder]: For 667/667 co-relation queries the response was YES. [2022-07-21 08:37:31,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 963 events. 316/963 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7318 event pairs, 20 based on Foata normal form. 6/950 useless extension candidates. Maximal degree in co-relation 2753. Up to 497 conditions per place. [2022-07-21 08:37:31,808 INFO L132 encePairwiseOnDemand]: 107/119 looper letters, 61 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2022-07-21 08:37:31,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 553 flow [2022-07-21 08:37:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:37:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 08:37:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 491 transitions. [2022-07-21 08:37:31,811 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5894357743097239 [2022-07-21 08:37:31,811 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 491 transitions. [2022-07-21 08:37:31,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 491 transitions. [2022-07-21 08:37:31,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:31,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 491 transitions. [2022-07-21 08:37:31,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,815 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,815 INFO L186 Difference]: Start difference. First operand has 78 places, 72 transitions, 221 flow. Second operand 7 states and 491 transitions. [2022-07-21 08:37:31,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 553 flow [2022-07-21 08:37:31,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 532 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:37:31,820 INFO L242 Difference]: Finished difference. Result has 86 places, 84 transitions, 336 flow [2022-07-21 08:37:31,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=336, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2022-07-21 08:37:31,822 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -4 predicate places. [2022-07-21 08:37:31,822 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 336 flow [2022-07-21 08:37:31,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:31,823 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:31,823 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2022-07-21 08:37:31,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:37:31,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 08:37:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:31,824 INFO L85 PathProgramCache]: Analyzing trace with hash -298955266, now seen corresponding path program 2 times [2022-07-21 08:37:31,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:31,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604041620] [2022-07-21 08:37:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:31,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:31,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:31,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604041620] [2022-07-21 08:37:31,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604041620] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:37:31,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491311863] [2022-07-21 08:37:31,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:37:31,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:37:31,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:37:31,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:37:31,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:37:32,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:37:32,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:37:32,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:37:32,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:37:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:32,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:37:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:32,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491311863] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:37:32,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:37:32,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-21 08:37:32,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472139893] [2022-07-21 08:37:32,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:37:32,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 08:37:32,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:32,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 08:37:32,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-07-21 08:37:32,463 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 119 [2022-07-21 08:37:32,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 336 flow. Second operand has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:32,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:32,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 119 [2022-07-21 08:37:32,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:33,351 INFO L129 PetriNetUnfolder]: 647/1843 cut-off events. [2022-07-21 08:37:33,352 INFO L130 PetriNetUnfolder]: For 1701/1701 co-relation queries the response was YES. [2022-07-21 08:37:33,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5668 conditions, 1843 events. 647/1843 cut-off events. For 1701/1701 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15434 event pairs, 14 based on Foata normal form. 10/1840 useless extension candidates. Maximal degree in co-relation 5622. Up to 505 conditions per place. [2022-07-21 08:37:33,374 INFO L132 encePairwiseOnDemand]: 103/119 looper letters, 100 selfloop transitions, 42 changer transitions 0/177 dead transitions. [2022-07-21 08:37:33,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 177 transitions, 1045 flow [2022-07-21 08:37:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 08:37:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 08:37:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 894 transitions. [2022-07-21 08:37:33,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5778926955397543 [2022-07-21 08:37:33,378 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 894 transitions. [2022-07-21 08:37:33,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 894 transitions. [2022-07-21 08:37:33,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:33,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 894 transitions. [2022-07-21 08:37:33,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 68.76923076923077) internal successors, (894), 13 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:33,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:33,384 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:33,384 INFO L186 Difference]: Start difference. First operand has 86 places, 84 transitions, 336 flow. Second operand 13 states and 894 transitions. [2022-07-21 08:37:33,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 177 transitions, 1045 flow [2022-07-21 08:37:33,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 177 transitions, 1032 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:37:33,391 INFO L242 Difference]: Finished difference. Result has 100 places, 108 transitions, 599 flow [2022-07-21 08:37:33,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=599, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2022-07-21 08:37:33,392 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 10 predicate places. [2022-07-21 08:37:33,392 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 599 flow [2022-07-21 08:37:33,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:33,393 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:33,393 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-07-21 08:37:33,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:37:33,616 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,SelfDestructingSolverStorable9 [2022-07-21 08:37:33,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 08:37:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1247337996, now seen corresponding path program 1 times [2022-07-21 08:37:33,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:33,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175003648] [2022-07-21 08:37:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:33,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:33,631 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:37:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:33,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:37:33,645 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:37:33,645 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-21 08:37:33,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-21 08:37:33,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-21 08:37:33,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-21 08:37:33,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-21 08:37:33,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-21 08:37:33,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:37:33,647 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-07-21 08:37:33,647 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:37:33,648 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:37:33,667 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:33,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 143 places, 146 transitions, 356 flow [2022-07-21 08:37:33,680 INFO L129 PetriNetUnfolder]: 16/153 cut-off events. [2022-07-21 08:37:33,681 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:37:33,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 153 events. 16/153 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 295 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 173. Up to 10 conditions per place. [2022-07-21 08:37:33,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 146 transitions, 356 flow [2022-07-21 08:37:33,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 103 transitions, 241 flow [2022-07-21 08:37:33,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:33,685 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@1b78f654, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e3e065b [2022-07-21 08:37:33,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:37:33,687 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2022-07-21 08:37:33,687 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:37:33,687 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:33,687 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] [2022-07-21 08:37:33,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:37:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash -610787504, now seen corresponding path program 1 times [2022-07-21 08:37:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:33,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609508807] [2022-07-21 08:37:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:33,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:33,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:33,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609508807] [2022-07-21 08:37:33,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609508807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:33,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:33,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:37:33,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294666524] [2022-07-21 08:37:33,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:33,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:37:33,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:33,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:37:33,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:37:33,714 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 146 [2022-07-21 08:37:33,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:33,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:33,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 146 [2022-07-21 08:37:33,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:39,696 INFO L129 PetriNetUnfolder]: 50080/69789 cut-off events. [2022-07-21 08:37:39,696 INFO L130 PetriNetUnfolder]: For 20816/20816 co-relation queries the response was YES. [2022-07-21 08:37:39,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143487 conditions, 69789 events. 50080/69789 cut-off events. For 20816/20816 co-relation queries the response was YES. Maximal size of possible extension queue 2579. Compared 487731 event pairs, 15030 based on Foata normal form. 34578/102288 useless extension candidates. Maximal degree in co-relation 143453. Up to 42229 conditions per place. [2022-07-21 08:37:40,601 INFO L132 encePairwiseOnDemand]: 121/146 looper letters, 60 selfloop transitions, 15 changer transitions 0/118 dead transitions. [2022-07-21 08:37:40,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 463 flow [2022-07-21 08:37:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:37:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 08:37:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2022-07-21 08:37:40,605 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.663013698630137 [2022-07-21 08:37:40,605 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 484 transitions. [2022-07-21 08:37:40,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 484 transitions. [2022-07-21 08:37:40,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:40,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 484 transitions. [2022-07-21 08:37:40,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:40,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 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) [2022-07-21 08:37:40,608 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 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) [2022-07-21 08:37:40,608 INFO L186 Difference]: Start difference. First operand has 103 places, 103 transitions, 241 flow. Second operand 5 states and 484 transitions. [2022-07-21 08:37:40,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 463 flow [2022-07-21 08:37:40,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 438 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-21 08:37:40,618 INFO L242 Difference]: Finished difference. Result has 87 places, 87 transitions, 276 flow [2022-07-21 08:37:40,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2022-07-21 08:37:40,619 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -16 predicate places. [2022-07-21 08:37:40,622 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 276 flow [2022-07-21 08:37:40,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:40,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:40,623 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] [2022-07-21 08:37:40,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:37:40,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:37:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash 497899920, now seen corresponding path program 1 times [2022-07-21 08:37:40,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:40,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539789039] [2022-07-21 08:37:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:40,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:40,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:40,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539789039] [2022-07-21 08:37:40,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539789039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:40,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:40,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:37:40,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209108371] [2022-07-21 08:37:40,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:40,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:37:40,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:40,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:37:40,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:37:40,660 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 146 [2022-07-21 08:37:40,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:40,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:40,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 146 [2022-07-21 08:37:40,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:40,804 INFO L129 PetriNetUnfolder]: 414/1413 cut-off events. [2022-07-21 08:37:40,804 INFO L130 PetriNetUnfolder]: For 504/504 co-relation queries the response was YES. [2022-07-21 08:37:40,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2913 conditions, 1413 events. 414/1413 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10153 event pairs, 50 based on Foata normal form. 765/2169 useless extension candidates. Maximal degree in co-relation 2875. Up to 460 conditions per place. [2022-07-21 08:37:40,817 INFO L132 encePairwiseOnDemand]: 136/146 looper letters, 10 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2022-07-21 08:37:40,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 318 flow [2022-07-21 08:37:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:37:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:37:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2022-07-21 08:37:40,819 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7077625570776256 [2022-07-21 08:37:40,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2022-07-21 08:37:40,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2022-07-21 08:37:40,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:40,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2022-07-21 08:37:40,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:40,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:40,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:40,822 INFO L186 Difference]: Start difference. First operand has 87 places, 87 transitions, 276 flow. Second operand 3 states and 310 transitions. [2022-07-21 08:37:40,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 318 flow [2022-07-21 08:37:40,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 308 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-07-21 08:37:40,826 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 262 flow [2022-07-21 08:37:40,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-07-21 08:37:40,827 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -15 predicate places. [2022-07-21 08:37:40,827 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 262 flow [2022-07-21 08:37:40,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:40,828 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:40,828 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] [2022-07-21 08:37:40,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:37:40,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:37:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:40,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2145552573, now seen corresponding path program 1 times [2022-07-21 08:37:40,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:40,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582129079] [2022-07-21 08:37:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:40,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:40,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:40,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582129079] [2022-07-21 08:37:40,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582129079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:40,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:40,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:37:40,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638473780] [2022-07-21 08:37:40,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:40,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:37:40,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:37:40,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:37:40,903 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 146 [2022-07-21 08:37:40,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 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) [2022-07-21 08:37:40,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:40,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 146 [2022-07-21 08:37:40,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:41,295 INFO L129 PetriNetUnfolder]: 851/2282 cut-off events. [2022-07-21 08:37:41,295 INFO L130 PetriNetUnfolder]: For 1721/1721 co-relation queries the response was YES. [2022-07-21 08:37:41,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6882 conditions, 2282 events. 851/2282 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19822 event pairs, 37 based on Foata normal form. 10/2254 useless extension candidates. Maximal degree in co-relation 6842. Up to 1407 conditions per place. [2022-07-21 08:37:41,315 INFO L132 encePairwiseOnDemand]: 131/146 looper letters, 78 selfloop transitions, 22 changer transitions 0/138 dead transitions. [2022-07-21 08:37:41,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 696 flow [2022-07-21 08:37:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:37:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 08:37:41,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 574 transitions. [2022-07-21 08:37:41,318 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2022-07-21 08:37:41,318 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 574 transitions. [2022-07-21 08:37:41,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 574 transitions. [2022-07-21 08:37:41,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:41,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 574 transitions. [2022-07-21 08:37:41,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:41,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 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) [2022-07-21 08:37:41,323 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 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) [2022-07-21 08:37:41,323 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 262 flow. Second operand 7 states and 574 transitions. [2022-07-21 08:37:41,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 696 flow [2022-07-21 08:37:41,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:37:41,328 INFO L242 Difference]: Finished difference. Result has 96 places, 99 transitions, 414 flow [2022-07-21 08:37:41,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2022-07-21 08:37:41,329 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -7 predicate places. [2022-07-21 08:37:41,329 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 414 flow [2022-07-21 08:37:41,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 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) [2022-07-21 08:37:41,330 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:41,330 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2022-07-21 08:37:41,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 08:37:41,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:37:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1408106927, now seen corresponding path program 2 times [2022-07-21 08:37:41,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:41,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345567347] [2022-07-21 08:37:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:41,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:41,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345567347] [2022-07-21 08:37:41,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345567347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:37:41,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165192045] [2022-07-21 08:37:41,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:37:41,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:37:41,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:37:41,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:37:41,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:37:41,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:37:41,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:37:41,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:37:41,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:37:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:41,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:37:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:41,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165192045] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:37:41,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:37:41,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-21 08:37:41,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578001648] [2022-07-21 08:37:41,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:37:41,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 08:37:41,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:41,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 08:37:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-07-21 08:37:41,877 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2022-07-21 08:37:41,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 414 flow. Second operand has 23 states, 23 states have (on average 70.6086956521739) internal successors, (1624), 23 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:41,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:41,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2022-07-21 08:37:41,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:43,116 INFO L129 PetriNetUnfolder]: 1825/4623 cut-off events. [2022-07-21 08:37:43,116 INFO L130 PetriNetUnfolder]: For 4546/4546 co-relation queries the response was YES. [2022-07-21 08:37:43,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14609 conditions, 4623 events. 1825/4623 cut-off events. For 4546/4546 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 45812 event pairs, 23 based on Foata normal form. 20/4620 useless extension candidates. Maximal degree in co-relation 14562. Up to 1463 conditions per place. [2022-07-21 08:37:43,150 INFO L132 encePairwiseOnDemand]: 126/146 looper letters, 129 selfloop transitions, 55 changer transitions 0/221 dead transitions. [2022-07-21 08:37:43,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 221 transitions, 1350 flow [2022-07-21 08:37:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 08:37:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 08:37:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1049 transitions. [2022-07-21 08:37:43,156 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5526870389884089 [2022-07-21 08:37:43,156 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1049 transitions. [2022-07-21 08:37:43,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1049 transitions. [2022-07-21 08:37:43,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:43,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1049 transitions. [2022-07-21 08:37:43,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 80.6923076923077) internal successors, (1049), 13 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:43,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:43,163 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:43,163 INFO L186 Difference]: Start difference. First operand has 96 places, 99 transitions, 414 flow. Second operand 13 states and 1049 transitions. [2022-07-21 08:37:43,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 221 transitions, 1350 flow [2022-07-21 08:37:43,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 221 transitions, 1334 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:37:43,174 INFO L242 Difference]: Finished difference. Result has 110 places, 131 transitions, 763 flow [2022-07-21 08:37:43,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=763, PETRI_PLACES=110, PETRI_TRANSITIONS=131} [2022-07-21 08:37:43,175 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-07-21 08:37:43,175 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 131 transitions, 763 flow [2022-07-21 08:37:43,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 70.6086956521739) internal successors, (1624), 23 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:43,176 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:43,176 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-21 08:37:43,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:37:43,395 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,SelfDestructingSolverStorable14 [2022-07-21 08:37:43,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:37:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash -540595927, now seen corresponding path program 3 times [2022-07-21 08:37:43,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:43,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560582529] [2022-07-21 08:37:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:43,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:43,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:43,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560582529] [2022-07-21 08:37:43,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560582529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:37:43,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485550368] [2022-07-21 08:37:43,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 08:37:43,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:37:43,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:37:43,491 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:37:43,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:37:43,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 08:37:43,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:37:43,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 08:37:43,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:37:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:43,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:37:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:44,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485550368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:37:44,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:37:44,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2022-07-21 08:37:44,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088660576] [2022-07-21 08:37:44,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:37:44,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 08:37:44,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:44,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 08:37:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-07-21 08:37:44,070 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2022-07-21 08:37:44,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 763 flow. Second operand has 26 states, 26 states have (on average 70.96153846153847) internal successors, (1845), 26 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:44,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:44,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2022-07-21 08:37:44,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:47,094 INFO L129 PetriNetUnfolder]: 4409/11192 cut-off events. [2022-07-21 08:37:47,094 INFO L130 PetriNetUnfolder]: For 16869/16869 co-relation queries the response was YES. [2022-07-21 08:37:47,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40342 conditions, 11192 events. 4409/11192 cut-off events. For 16869/16869 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 122705 event pairs, 23 based on Foata normal form. 180/11349 useless extension candidates. Maximal degree in co-relation 40289. Up to 2321 conditions per place. [2022-07-21 08:37:47,177 INFO L132 encePairwiseOnDemand]: 124/146 looper letters, 159 selfloop transitions, 202 changer transitions 0/398 dead transitions. [2022-07-21 08:37:47,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 398 transitions, 3162 flow [2022-07-21 08:37:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 08:37:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 08:37:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2445 transitions. [2022-07-21 08:37:47,184 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5233304794520548 [2022-07-21 08:37:47,184 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2445 transitions. [2022-07-21 08:37:47,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2445 transitions. [2022-07-21 08:37:47,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:47,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2445 transitions. [2022-07-21 08:37:47,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 76.40625) internal successors, (2445), 32 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:47,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 146.0) internal successors, (4818), 33 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:47,199 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 146.0) internal successors, (4818), 33 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:47,199 INFO L186 Difference]: Start difference. First operand has 110 places, 131 transitions, 763 flow. Second operand 32 states and 2445 transitions. [2022-07-21 08:37:47,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 398 transitions, 3162 flow [2022-07-21 08:37:47,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 398 transitions, 3031 flow, removed 48 selfloop flow, removed 5 redundant places. [2022-07-21 08:37:47,243 INFO L242 Difference]: Finished difference. Result has 137 places, 256 transitions, 1978 flow [2022-07-21 08:37:47,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1978, PETRI_PLACES=137, PETRI_TRANSITIONS=256} [2022-07-21 08:37:47,244 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2022-07-21 08:37:47,244 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 256 transitions, 1978 flow [2022-07-21 08:37:47,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 70.96153846153847) internal successors, (1845), 26 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:47,245 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:47,246 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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] [2022-07-21 08:37:47,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 08:37:47,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:37:47,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:37:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1175858377, now seen corresponding path program 1 times [2022-07-21 08:37:47,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:47,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425588264] [2022-07-21 08:37:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:47,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:47,474 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:37:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:47,502 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:37:47,504 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:37:47,505 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-21 08:37:47,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-21 08:37:47,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-07-21 08:37:47,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-21 08:37:47,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-21 08:37:47,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-21 08:37:47,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-21 08:37:47,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 08:37:47,506 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-07-21 08:37:47,509 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:37:47,509 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:37:47,539 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:47,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 173 transitions, 436 flow [2022-07-21 08:37:47,555 INFO L129 PetriNetUnfolder]: 19/179 cut-off events. [2022-07-21 08:37:47,555 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:37:47,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 179 events. 19/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 350 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2022-07-21 08:37:47,557 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 173 transitions, 436 flow [2022-07-21 08:37:47,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 116 transitions, 280 flow [2022-07-21 08:37:47,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:47,561 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b78f654, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e3e065b [2022-07-21 08:37:47,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-21 08:37:47,563 INFO L129 PetriNetUnfolder]: 4/41 cut-off events. [2022-07-21 08:37:47,563 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:37:47,563 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:47,564 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] [2022-07-21 08:37:47,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-07-21 08:37:47,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:47,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1240615746, now seen corresponding path program 1 times [2022-07-21 08:37:47,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:47,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371204270] [2022-07-21 08:37:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:47,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:47,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:47,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371204270] [2022-07-21 08:37:47,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371204270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:47,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:47,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:37:47,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087425108] [2022-07-21 08:37:47,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:47,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:37:47,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:47,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:37:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:37:47,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 173 [2022-07-21 08:37:47,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 116 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:47,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:47,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 173 [2022-07-21 08:37:47,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand