./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-1.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 b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 09:59:41,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 09:59:41,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 09:59:41,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 09:59:41,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 09:59:41,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 09:59:41,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 09:59:41,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 09:59:41,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 09:59:41,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 09:59:41,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 09:59:41,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 09:59:41,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 09:59:41,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 09:59:41,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 09:59:41,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 09:59:41,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 09:59:41,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 09:59:41,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 09:59:41,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 09:59:41,389 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 09:59:41,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 09:59:41,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 09:59:41,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 09:59:41,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 09:59:41,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 09:59:41,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 09:59:41,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 09:59:41,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 09:59:41,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 09:59:41,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 09:59:41,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 09:59:41,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 09:59:41,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 09:59:41,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 09:59:41,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 09:59:41,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 09:59:41,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 09:59:41,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 09:59:41,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 09:59:41,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 09:59:41,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 09:59:41,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 09:59:41,443 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 09:59:41,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 09:59:41,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 09:59:41,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 09:59:41,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 09:59:41,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 09:59:41,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 09:59:41,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 09:59:41,446 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 09:59:41,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 09:59:41,448 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 09:59:41,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 09:59:41,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 09:59:41,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 09:59:41,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 09:59:41,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 09:59:41,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 09:59:41,449 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 09:59:41,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 09:59:41,450 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 09:59:41,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 09:59:41,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 09:59:41,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 09:59:41,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 09:59:41,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:59:41,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 09:59:41,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 09:59:41,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 09:59:41,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 09:59:41,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 09:59:41,452 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 09:59:41,453 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 09:59:41,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 09:59:41,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd [2022-07-12 09:59:41,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 09:59:41,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 09:59:41,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 09:59:41,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 09:59:41,723 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 09:59:41,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-1.i [2022-07-12 09:59:41,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/576903944/099756751dc245549f1aa56cef55ee59/FLAGc7f3744ef [2022-07-12 09:59:42,168 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 09:59:42,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-1.i [2022-07-12 09:59:42,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/576903944/099756751dc245549f1aa56cef55ee59/FLAGc7f3744ef [2022-07-12 09:59:42,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/576903944/099756751dc245549f1aa56cef55ee59 [2022-07-12 09:59:42,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 09:59:42,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 09:59:42,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 09:59:42,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 09:59:42,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 09:59:42,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9b35ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42, skipping insertion in model container [2022-07-12 09:59:42,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 09:59:42,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 09:59:42,623 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/triangular-1.i[30950,30963] [2022-07-12 09:59:42,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:59:42,632 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 09:59:42,678 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/triangular-1.i[30950,30963] [2022-07-12 09:59:42,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:59:42,711 INFO L208 MainTranslator]: Completed translation [2022-07-12 09:59:42,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42 WrapperNode [2022-07-12 09:59:42,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 09:59:42,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 09:59:42,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 09:59:42,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 09:59:42,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,767 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-07-12 09:59:42,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 09:59:42,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 09:59:42,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 09:59:42,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 09:59:42,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 09:59:42,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 09:59:42,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 09:59:42,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 09:59:42,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (1/1) ... [2022-07-12 09:59:42,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:59:42,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:42,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 09:59:42,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 09:59:42,889 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-12 09:59:42,889 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-12 09:59:42,889 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-12 09:59:42,889 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-12 09:59:42,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 09:59:42,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 09:59:42,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 09:59:42,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 09:59:42,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 09:59:42,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 09:59:42,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 09:59:42,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 09:59:42,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 09:59:42,892 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 09:59:43,004 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 09:59:43,016 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 09:59:43,138 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 09:59:43,143 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 09:59:43,143 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 09:59:43,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:59:43 BoogieIcfgContainer [2022-07-12 09:59:43,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 09:59:43,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 09:59:43,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 09:59:43,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 09:59:43,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 09:59:42" (1/3) ... [2022-07-12 09:59:43,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369033a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:59:43, skipping insertion in model container [2022-07-12 09:59:43,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:42" (2/3) ... [2022-07-12 09:59:43,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369033a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:59:43, skipping insertion in model container [2022-07-12 09:59:43,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:59:43" (3/3) ... [2022-07-12 09:59:43,152 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2022-07-12 09:59:43,157 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 09:59:43,165 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 09:59:43,165 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 09:59:43,166 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 09:59:43,218 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 09:59:43,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-07-12 09:59:43,288 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-07-12 09:59:43,289 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 09:59:43,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-07-12 09:59:43,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-07-12 09:59:43,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-07-12 09:59:43,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 09:59:43,318 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@5c23fa26, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@13d120ec [2022-07-12 09:59:43,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 09:59:43,337 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-07-12 09:59:43,337 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 09:59:43,337 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:43,338 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] [2022-07-12 09:59:43,339 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:43,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:43,343 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-07-12 09:59:43,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:43,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70517441] [2022-07-12 09:59:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:43,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:43,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:43,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70517441] [2022-07-12 09:59:43,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70517441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:43,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:43,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:59:43,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540084853] [2022-07-12 09:59:43,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:43,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:59:43,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:59:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:59:43,710 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:43,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:43,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:43,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:43,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:43,858 INFO L129 PetriNetUnfolder]: 42/203 cut-off events. [2022-07-12 09:59:43,858 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 09:59:43,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 203 events. 42/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 761 event pairs, 3 based on Foata normal form. 45/231 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-07-12 09:59:43,862 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-07-12 09:59:43,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-07-12 09:59:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 09:59:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 09:59:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-07-12 09:59:43,876 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-07-12 09:59:43,877 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-07-12 09:59:43,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-07-12 09:59:43,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:43,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-07-12 09:59:43,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:43,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:43,895 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:43,896 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-07-12 09:59:43,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-07-12 09:59:43,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 09:59:43,902 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-07-12 09:59:43,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-07-12 09:59:43,907 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-07-12 09:59:43,907 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-07-12 09:59:43,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:43,908 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:43,908 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] [2022-07-12 09:59:43,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 09:59:43,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-07-12 09:59:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:43,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621221166] [2022-07-12 09:59:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:43,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:44,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:44,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621221166] [2022-07-12 09:59:44,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621221166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:44,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:44,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:59:44,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934791013] [2022-07-12 09:59:44,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:44,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:59:44,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:44,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:59:44,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:59:44,034 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:44,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:44,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:44,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:44,184 INFO L129 PetriNetUnfolder]: 46/218 cut-off events. [2022-07-12 09:59:44,184 INFO L130 PetriNetUnfolder]: For 115/120 co-relation queries the response was YES. [2022-07-12 09:59:44,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 115/120 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 854 event pairs, 0 based on Foata normal form. 3/206 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2022-07-12 09:59:44,187 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-07-12 09:59:44,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-07-12 09:59:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 09:59:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 09:59:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-07-12 09:59:44,193 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-07-12 09:59:44,193 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-07-12 09:59:44,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-07-12 09:59:44,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:44,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-07-12 09:59:44,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,198 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,198 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-07-12 09:59:44,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-07-12 09:59:44,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 09:59:44,210 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-07-12 09:59:44,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-07-12 09:59:44,211 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-07-12 09:59:44,212 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-07-12 09:59:44,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,212 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:44,213 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] [2022-07-12 09:59:44,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 09:59:44,214 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-07-12 09:59:44,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:44,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491595464] [2022-07-12 09:59:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:44,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:44,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:44,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491595464] [2022-07-12 09:59:44,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491595464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:44,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:44,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:59:44,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212667276] [2022-07-12 09:59:44,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:44,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:59:44,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:59:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:59:44,340 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:44,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:44,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:44,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:44,466 INFO L129 PetriNetUnfolder]: 37/196 cut-off events. [2022-07-12 09:59:44,466 INFO L130 PetriNetUnfolder]: For 265/276 co-relation queries the response was YES. [2022-07-12 09:59:44,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 196 events. 37/196 cut-off events. For 265/276 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 654 event pairs, 0 based on Foata normal form. 12/190 useless extension candidates. Maximal degree in co-relation 362. Up to 35 conditions per place. [2022-07-12 09:59:44,471 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-07-12 09:59:44,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-07-12 09:59:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 09:59:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 09:59:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-07-12 09:59:44,474 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-07-12 09:59:44,475 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-07-12 09:59:44,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-07-12 09:59:44,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:44,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-07-12 09:59:44,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,479 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,480 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-07-12 09:59:44,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-07-12 09:59:44,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-07-12 09:59:44,487 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-07-12 09:59:44,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-07-12 09:59:44,489 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-07-12 09:59:44,489 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-07-12 09:59:44,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,490 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:44,490 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] [2022-07-12 09:59:44,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 09:59:44,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:44,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-07-12 09:59:44,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:44,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800816658] [2022-07-12 09:59:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:44,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:44,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:44,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800816658] [2022-07-12 09:59:44,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800816658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:44,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:44,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:59:44,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988912477] [2022-07-12 09:59:44,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:44,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:59:44,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:59:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:59:44,640 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:44,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:44,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:44,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:44,741 INFO L129 PetriNetUnfolder]: 30/185 cut-off events. [2022-07-12 09:59:44,741 INFO L130 PetriNetUnfolder]: For 253/276 co-relation queries the response was YES. [2022-07-12 09:59:44,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 185 events. 30/185 cut-off events. For 253/276 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 18/186 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2022-07-12 09:59:44,743 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-07-12 09:59:44,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-07-12 09:59:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 09:59:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 09:59:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-07-12 09:59:44,746 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-07-12 09:59:44,746 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-07-12 09:59:44,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-07-12 09:59:44,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:44,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-07-12 09:59:44,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,753 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,753 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-07-12 09:59:44,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-07-12 09:59:44,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-12 09:59:44,760 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-07-12 09:59:44,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-07-12 09:59:44,761 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-07-12 09:59:44,761 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-07-12 09:59:44,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,766 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:44,767 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:44,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 09:59:44,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:44,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1461818299, now seen corresponding path program 1 times [2022-07-12 09:59:44,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:44,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343237126] [2022-07-12 09:59:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:44,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:44,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:44,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343237126] [2022-07-12 09:59:44,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343237126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:44,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:44,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:59:44,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968887382] [2022-07-12 09:59:44,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:44,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:59:44,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:44,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:59:44,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:59:44,877 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:44,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:44,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:44,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:44,978 INFO L129 PetriNetUnfolder]: 43/234 cut-off events. [2022-07-12 09:59:44,978 INFO L130 PetriNetUnfolder]: For 621/645 co-relation queries the response was YES. [2022-07-12 09:59:44,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 234 events. 43/234 cut-off events. For 621/645 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 845 event pairs, 1 based on Foata normal form. 17/229 useless extension candidates. Maximal degree in co-relation 535. Up to 50 conditions per place. [2022-07-12 09:59:44,981 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 21 changer transitions 8/97 dead transitions. [2022-07-12 09:59:44,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 660 flow [2022-07-12 09:59:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 09:59:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 09:59:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-07-12 09:59:44,983 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-07-12 09:59:44,984 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-07-12 09:59:44,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-07-12 09:59:44,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:44,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-07-12 09:59:44,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,988 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,988 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 644 transitions. [2022-07-12 09:59:44,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 660 flow [2022-07-12 09:59:44,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 544 flow, removed 45 selfloop flow, removed 10 redundant places. [2022-07-12 09:59:44,993 INFO L242 Difference]: Finished difference. Result has 97 places, 79 transitions, 417 flow [2022-07-12 09:59:44,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2022-07-12 09:59:44,996 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2022-07-12 09:59:44,996 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 417 flow [2022-07-12 09:59:44,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:44,996 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:44,997 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:44,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 09:59:44,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:45,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973881, now seen corresponding path program 2 times [2022-07-12 09:59:45,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:45,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782101550] [2022-07-12 09:59:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:45,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782101550] [2022-07-12 09:59:45,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782101550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:45,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:45,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:59:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171514207] [2022-07-12 09:59:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:59:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:59:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:59:45,101 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:45,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:45,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:45,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:45,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:45,223 INFO L129 PetriNetUnfolder]: 36/209 cut-off events. [2022-07-12 09:59:45,223 INFO L130 PetriNetUnfolder]: For 773/809 co-relation queries the response was YES. [2022-07-12 09:59:45,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 209 events. 36/209 cut-off events. For 773/809 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 715 event pairs, 1 based on Foata normal form. 27/217 useless extension candidates. Maximal degree in co-relation 551. Up to 44 conditions per place. [2022-07-12 09:59:45,225 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 20 selfloop transitions, 21 changer transitions 11/97 dead transitions. [2022-07-12 09:59:45,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 97 transitions, 749 flow [2022-07-12 09:59:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 09:59:45,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 09:59:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-07-12 09:59:45,228 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-12 09:59:45,228 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-07-12 09:59:45,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-07-12 09:59:45,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:45,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-07-12 09:59:45,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:45,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:45,232 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:45,232 INFO L186 Difference]: Start difference. First operand has 97 places, 79 transitions, 417 flow. Second operand 11 states and 638 transitions. [2022-07-12 09:59:45,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 97 transitions, 749 flow [2022-07-12 09:59:45,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 693 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-07-12 09:59:45,238 INFO L242 Difference]: Finished difference. Result has 104 places, 80 transitions, 470 flow [2022-07-12 09:59:45,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=470, PETRI_PLACES=104, PETRI_TRANSITIONS=80} [2022-07-12 09:59:45,239 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-07-12 09:59:45,239 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 80 transitions, 470 flow [2022-07-12 09:59:45,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:45,239 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:45,240 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:45,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 09:59:45,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:45,241 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 3 times [2022-07-12 09:59:45,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:45,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51050916] [2022-07-12 09:59:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:45,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:45,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:45,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51050916] [2022-07-12 09:59:45,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51050916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:45,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:45,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:59:45,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252419107] [2022-07-12 09:59:45,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:45,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:59:45,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:45,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:59:45,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:59:45,318 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:45,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 80 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:45,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:45,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:45,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:45,428 INFO L129 PetriNetUnfolder]: 37/218 cut-off events. [2022-07-12 09:59:45,428 INFO L130 PetriNetUnfolder]: For 962/999 co-relation queries the response was YES. [2022-07-12 09:59:45,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 218 events. 37/218 cut-off events. For 962/999 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 855 event pairs, 0 based on Foata normal form. 31/229 useless extension candidates. Maximal degree in co-relation 598. Up to 45 conditions per place. [2022-07-12 09:59:45,431 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 28 selfloop transitions, 16 changer transitions 5/94 dead transitions. [2022-07-12 09:59:45,431 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 94 transitions, 753 flow [2022-07-12 09:59:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 09:59:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 09:59:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 526 transitions. [2022-07-12 09:59:45,433 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.834920634920635 [2022-07-12 09:59:45,433 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 526 transitions. [2022-07-12 09:59:45,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 526 transitions. [2022-07-12 09:59:45,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:45,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 526 transitions. [2022-07-12 09:59:45,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.44444444444444) internal successors, (526), 9 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:45,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:45,437 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:45,437 INFO L186 Difference]: Start difference. First operand has 104 places, 80 transitions, 470 flow. Second operand 9 states and 526 transitions. [2022-07-12 09:59:45,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 94 transitions, 753 flow [2022-07-12 09:59:45,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 677 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-07-12 09:59:45,444 INFO L242 Difference]: Finished difference. Result has 104 places, 85 transitions, 532 flow [2022-07-12 09:59:45,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=104, PETRI_TRANSITIONS=85} [2022-07-12 09:59:45,445 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-07-12 09:59:45,446 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 85 transitions, 532 flow [2022-07-12 09:59:45,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:45,446 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:45,447 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:45,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 09:59:45,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1915188887, now seen corresponding path program 1 times [2022-07-12 09:59:45,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:45,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345393813] [2022-07-12 09:59:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:45,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:45,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:45,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345393813] [2022-07-12 09:59:45,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345393813] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:45,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215488595] [2022-07-12 09:59:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:45,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:45,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:45,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:45,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 09:59:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 09:59:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:45,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:45,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215488595] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:59:45,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:59:45,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-12 09:59:45,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731483095] [2022-07-12 09:59:45,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:59:45,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 09:59:45,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 09:59:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-12 09:59:45,904 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:45,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 85 transitions, 532 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 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) [2022-07-12 09:59:45,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:45,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:45,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:46,238 INFO L129 PetriNetUnfolder]: 55/317 cut-off events. [2022-07-12 09:59:46,238 INFO L130 PetriNetUnfolder]: For 1278/1326 co-relation queries the response was YES. [2022-07-12 09:59:46,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 317 events. 55/317 cut-off events. For 1278/1326 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1281 event pairs, 1 based on Foata normal form. 36/322 useless extension candidates. Maximal degree in co-relation 885. Up to 67 conditions per place. [2022-07-12 09:59:46,242 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 38 changer transitions 14/124 dead transitions. [2022-07-12 09:59:46,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 1220 flow [2022-07-12 09:59:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 09:59:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-12 09:59:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-07-12 09:59:46,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-07-12 09:59:46,247 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-07-12 09:59:46,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-07-12 09:59:46,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:46,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-07-12 09:59:46,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:46,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:46,254 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:46,254 INFO L186 Difference]: Start difference. First operand has 104 places, 85 transitions, 532 flow. Second operand 20 states and 1159 transitions. [2022-07-12 09:59:46,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 1220 flow [2022-07-12 09:59:46,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 124 transitions, 1199 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-12 09:59:46,261 INFO L242 Difference]: Finished difference. Result has 128 places, 101 transitions, 879 flow [2022-07-12 09:59:46,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=879, PETRI_PLACES=128, PETRI_TRANSITIONS=101} [2022-07-12 09:59:46,262 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 58 predicate places. [2022-07-12 09:59:46,262 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 101 transitions, 879 flow [2022-07-12 09:59:46,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 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) [2022-07-12 09:59:46,263 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:46,263 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:46,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 09:59:46,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:46,487 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2022110288, now seen corresponding path program 1 times [2022-07-12 09:59:46,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:46,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954822123] [2022-07-12 09:59:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:46,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:59:46,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:46,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954822123] [2022-07-12 09:59:46,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954822123] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:46,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360103837] [2022-07-12 09:59:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:46,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:46,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:46,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:46,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 09:59:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 09:59:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:59:46,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:59:47,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360103837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:59:47,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:59:47,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-12 09:59:47,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022104387] [2022-07-12 09:59:47,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:59:47,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 09:59:47,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 09:59:47,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-07-12 09:59:47,010 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:47,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 101 transitions, 879 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:47,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:47,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:47,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:47,372 INFO L129 PetriNetUnfolder]: 77/442 cut-off events. [2022-07-12 09:59:47,373 INFO L130 PetriNetUnfolder]: For 3503/3581 co-relation queries the response was YES. [2022-07-12 09:59:47,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 442 events. 77/442 cut-off events. For 3503/3581 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1821 event pairs, 0 based on Foata normal form. 37/435 useless extension candidates. Maximal degree in co-relation 1532. Up to 103 conditions per place. [2022-07-12 09:59:47,378 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 27 changer transitions 26/156 dead transitions. [2022-07-12 09:59:47,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 156 transitions, 2115 flow [2022-07-12 09:59:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 09:59:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-12 09:59:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-07-12 09:59:47,384 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-12 09:59:47,384 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-07-12 09:59:47,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-07-12 09:59:47,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:47,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-07-12 09:59:47,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:47,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:47,395 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:47,395 INFO L186 Difference]: Start difference. First operand has 128 places, 101 transitions, 879 flow. Second operand 25 states and 1450 transitions. [2022-07-12 09:59:47,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 156 transitions, 2115 flow [2022-07-12 09:59:47,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 156 transitions, 1698 flow, removed 191 selfloop flow, removed 12 redundant places. [2022-07-12 09:59:47,408 INFO L242 Difference]: Finished difference. Result has 154 places, 115 transitions, 1007 flow [2022-07-12 09:59:47,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1007, PETRI_PLACES=154, PETRI_TRANSITIONS=115} [2022-07-12 09:59:47,410 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2022-07-12 09:59:47,410 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 115 transitions, 1007 flow [2022-07-12 09:59:47,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:47,410 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:47,411 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:47,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 09:59:47,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-12 09:59:47,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:47,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2046027908, now seen corresponding path program 2 times [2022-07-12 09:59:47,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:47,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657242215] [2022-07-12 09:59:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:47,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:59:47,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:47,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657242215] [2022-07-12 09:59:47,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657242215] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:47,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649320597] [2022-07-12 09:59:47,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 09:59:47,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:47,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:47,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 09:59:47,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 09:59:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 09:59:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 09:59:47,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:59:47,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:59:48,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649320597] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:59:48,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:59:48,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-12 09:59:48,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052499410] [2022-07-12 09:59:48,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:59:48,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 09:59:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 09:59:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-07-12 09:59:48,087 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:48,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 115 transitions, 1007 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:48,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:48,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:48,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:48,624 INFO L129 PetriNetUnfolder]: 131/805 cut-off events. [2022-07-12 09:59:48,624 INFO L130 PetriNetUnfolder]: For 14458/14617 co-relation queries the response was YES. [2022-07-12 09:59:48,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 805 events. 131/805 cut-off events. For 14458/14617 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4796 event pairs, 0 based on Foata normal form. 48/771 useless extension candidates. Maximal degree in co-relation 3342. Up to 163 conditions per place. [2022-07-12 09:59:48,636 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 83 changer transitions 26/212 dead transitions. [2022-07-12 09:59:48,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 212 transitions, 3549 flow [2022-07-12 09:59:48,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 09:59:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-12 09:59:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1915 transitions. [2022-07-12 09:59:48,640 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.829004329004329 [2022-07-12 09:59:48,640 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1915 transitions. [2022-07-12 09:59:48,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1915 transitions. [2022-07-12 09:59:48,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:48,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1915 transitions. [2022-07-12 09:59:48,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.03030303030303) internal successors, (1915), 33 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:48,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:48,655 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:48,655 INFO L186 Difference]: Start difference. First operand has 154 places, 115 transitions, 1007 flow. Second operand 33 states and 1915 transitions. [2022-07-12 09:59:48,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 212 transitions, 3549 flow [2022-07-12 09:59:48,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 212 transitions, 2974 flow, removed 280 selfloop flow, removed 12 redundant places. [2022-07-12 09:59:48,714 INFO L242 Difference]: Finished difference. Result has 188 places, 158 transitions, 1866 flow [2022-07-12 09:59:48,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1866, PETRI_PLACES=188, PETRI_TRANSITIONS=158} [2022-07-12 09:59:48,715 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 118 predicate places. [2022-07-12 09:59:48,716 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 158 transitions, 1866 flow [2022-07-12 09:59:48,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:48,716 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:48,717 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:48,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 09:59:48,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:48,928 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:48,928 INFO L85 PathProgramCache]: Analyzing trace with hash -518674714, now seen corresponding path program 3 times [2022-07-12 09:59:48,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:48,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785225310] [2022-07-12 09:59:48,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:48,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:59:49,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:49,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785225310] [2022-07-12 09:59:49,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785225310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:49,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471889586] [2022-07-12 09:59:49,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 09:59:49,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:49,028 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:49,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 09:59:49,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 09:59:49,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 09:59:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 09:59:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:59:49,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:59:49,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471889586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:59:49,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:59:49,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-12 09:59:49,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972284686] [2022-07-12 09:59:49,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:59:49,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 09:59:49,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:49,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 09:59:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-12 09:59:49,318 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:49,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 158 transitions, 1866 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:49,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:49,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:49,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:50,121 INFO L129 PetriNetUnfolder]: 169/1075 cut-off events. [2022-07-12 09:59:50,122 INFO L130 PetriNetUnfolder]: For 36727/36963 co-relation queries the response was YES. [2022-07-12 09:59:50,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5443 conditions, 1075 events. 169/1075 cut-off events. For 36727/36963 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7400 event pairs, 0 based on Foata normal form. 52/1017 useless extension candidates. Maximal degree in co-relation 5347. Up to 215 conditions per place. [2022-07-12 09:59:50,141 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 130 changer transitions 31/268 dead transitions. [2022-07-12 09:59:50,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 268 transitions, 5607 flow [2022-07-12 09:59:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 09:59:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 09:59:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2022-07-12 09:59:50,145 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2022-07-12 09:59:50,145 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2022-07-12 09:59:50,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2022-07-12 09:59:50,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:50,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2022-07-12 09:59:50,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.916666666666664) internal successors, (2085), 36 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:50,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:50,156 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:50,156 INFO L186 Difference]: Start difference. First operand has 188 places, 158 transitions, 1866 flow. Second operand 36 states and 2085 transitions. [2022-07-12 09:59:50,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 268 transitions, 5607 flow [2022-07-12 09:59:50,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 268 transitions, 4763 flow, removed 403 selfloop flow, removed 18 redundant places. [2022-07-12 09:59:50,257 INFO L242 Difference]: Finished difference. Result has 218 places, 205 transitions, 2891 flow [2022-07-12 09:59:50,257 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2891, PETRI_PLACES=218, PETRI_TRANSITIONS=205} [2022-07-12 09:59:50,258 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 148 predicate places. [2022-07-12 09:59:50,258 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 205 transitions, 2891 flow [2022-07-12 09:59:50,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:50,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:50,259 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:50,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 09:59:50,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:50,484 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:50,485 INFO L85 PathProgramCache]: Analyzing trace with hash -390037378, now seen corresponding path program 4 times [2022-07-12 09:59:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:50,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180784921] [2022-07-12 09:59:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:50,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:50,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:50,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180784921] [2022-07-12 09:59:50,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180784921] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:50,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806081639] [2022-07-12 09:59:50,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 09:59:50,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:50,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:50,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:50,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 09:59:50,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 09:59:50,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 09:59:50,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 09:59:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:50,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:51,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806081639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:59:51,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:59:51,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2022-07-12 09:59:51,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026085233] [2022-07-12 09:59:51,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:59:51,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 09:59:51,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:51,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 09:59:51,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-07-12 09:59:51,135 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:51,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 205 transitions, 2891 flow. Second operand has 20 states, 20 states have (on average 56.55) internal successors, (1131), 20 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:51,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:51,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:51,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:51,729 INFO L129 PetriNetUnfolder]: 194/1272 cut-off events. [2022-07-12 09:59:51,729 INFO L130 PetriNetUnfolder]: For 59877/60016 co-relation queries the response was YES. [2022-07-12 09:59:51,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7069 conditions, 1272 events. 194/1272 cut-off events. For 59877/60016 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9360 event pairs, 1 based on Foata normal form. 37/1176 useless extension candidates. Maximal degree in co-relation 6962. Up to 247 conditions per place. [2022-07-12 09:59:51,754 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 96 selfloop transitions, 125 changer transitions 14/280 dead transitions. [2022-07-12 09:59:51,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 280 transitions, 6252 flow [2022-07-12 09:59:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 09:59:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-12 09:59:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1443 transitions. [2022-07-12 09:59:51,757 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8245714285714286 [2022-07-12 09:59:51,757 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1443 transitions. [2022-07-12 09:59:51,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1443 transitions. [2022-07-12 09:59:51,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:51,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1443 transitions. [2022-07-12 09:59:51,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.72) internal successors, (1443), 25 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:51,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:51,765 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:51,765 INFO L186 Difference]: Start difference. First operand has 218 places, 205 transitions, 2891 flow. Second operand 25 states and 1443 transitions. [2022-07-12 09:59:51,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 280 transitions, 6252 flow [2022-07-12 09:59:51,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 280 transitions, 5148 flow, removed 518 selfloop flow, removed 21 redundant places. [2022-07-12 09:59:51,902 INFO L242 Difference]: Finished difference. Result has 227 places, 248 transitions, 3726 flow [2022-07-12 09:59:51,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3726, PETRI_PLACES=227, PETRI_TRANSITIONS=248} [2022-07-12 09:59:51,903 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 157 predicate places. [2022-07-12 09:59:51,903 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 248 transitions, 3726 flow [2022-07-12 09:59:51,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.55) internal successors, (1131), 20 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:51,904 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:51,904 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:51,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 09:59:52,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 09:59:52,120 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:52,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:52,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1871808408, now seen corresponding path program 5 times [2022-07-12 09:59:52,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:52,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78491413] [2022-07-12 09:59:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:52,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:52,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:52,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78491413] [2022-07-12 09:59:52,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78491413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:52,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408248350] [2022-07-12 09:59:52,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 09:59:52,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:52,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:52,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:52,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 09:59:52,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 09:59:52,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 09:59:52,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 09:59:52,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:52,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:52,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408248350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:59:52,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:59:52,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-07-12 09:59:52,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872113305] [2022-07-12 09:59:52,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:59:52,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 09:59:52,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 09:59:52,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-07-12 09:59:52,810 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-12 09:59:52,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 248 transitions, 3726 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:52,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:52,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-12 09:59:52,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:53,606 INFO L129 PetriNetUnfolder]: 251/1616 cut-off events. [2022-07-12 09:59:53,606 INFO L130 PetriNetUnfolder]: For 80214/80411 co-relation queries the response was YES. [2022-07-12 09:59:53,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9207 conditions, 1616 events. 251/1616 cut-off events. For 80214/80411 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12647 event pairs, 1 based on Foata normal form. 64/1514 useless extension candidates. Maximal degree in co-relation 9094. Up to 331 conditions per place. [2022-07-12 09:59:53,638 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 71 selfloop transitions, 209 changer transitions 17/342 dead transitions. [2022-07-12 09:59:53,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 342 transitions, 7792 flow [2022-07-12 09:59:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 09:59:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-12 09:59:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1735 transitions. [2022-07-12 09:59:53,643 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8261904761904761 [2022-07-12 09:59:53,644 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1735 transitions. [2022-07-12 09:59:53,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1735 transitions. [2022-07-12 09:59:53,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:53,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1735 transitions. [2022-07-12 09:59:53,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.833333333333336) internal successors, (1735), 30 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:53,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 70.0) internal successors, (2170), 31 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:53,652 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 70.0) internal successors, (2170), 31 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:53,652 INFO L186 Difference]: Start difference. First operand has 227 places, 248 transitions, 3726 flow. Second operand 30 states and 1735 transitions. [2022-07-12 09:59:53,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 342 transitions, 7792 flow [2022-07-12 09:59:53,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 342 transitions, 6640 flow, removed 550 selfloop flow, removed 12 redundant places. [2022-07-12 09:59:53,835 INFO L242 Difference]: Finished difference. Result has 252 places, 309 transitions, 5304 flow [2022-07-12 09:59:53,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5304, PETRI_PLACES=252, PETRI_TRANSITIONS=309} [2022-07-12 09:59:53,837 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 182 predicate places. [2022-07-12 09:59:53,837 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 309 transitions, 5304 flow [2022-07-12 09:59:53,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:53,838 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:53,838 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:53,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 09:59:54,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:54,062 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:54,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:54,062 INFO L85 PathProgramCache]: Analyzing trace with hash 959354339, now seen corresponding path program 6 times [2022-07-12 09:59:54,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:54,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686455802] [2022-07-12 09:59:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:54,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 75 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 09:59:54,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:54,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686455802] [2022-07-12 09:59:54,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686455802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:54,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494187741] [2022-07-12 09:59:54,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 09:59:54,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:54,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:54,167 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:54,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 09:59:54,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-12 09:59:54,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 09:59:54,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 09:59:54,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 09:59:54,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:59:54,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494187741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:54,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 09:59:54,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2022-07-12 09:59:54,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510701895] [2022-07-12 09:59:54,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:54,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 09:59:54,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 09:59:54,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-12 09:59:54,330 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-07-12 09:59:54,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 309 transitions, 5304 flow. Second operand has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:54,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:54,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-07-12 09:59:54,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:55,294 INFO L129 PetriNetUnfolder]: 563/3477 cut-off events. [2022-07-12 09:59:55,296 INFO L130 PetriNetUnfolder]: For 80515/80603 co-relation queries the response was YES. [2022-07-12 09:59:55,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14947 conditions, 3477 events. 563/3477 cut-off events. For 80515/80603 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 35651 event pairs, 90 based on Foata normal form. 31/3167 useless extension candidates. Maximal degree in co-relation 14860. Up to 561 conditions per place. [2022-07-12 09:59:55,401 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 24 selfloop transitions, 20 changer transitions 179/325 dead transitions. [2022-07-12 09:59:55,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 325 transitions, 4943 flow [2022-07-12 09:59:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 09:59:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 09:59:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1090 transitions. [2022-07-12 09:59:55,405 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8650793650793651 [2022-07-12 09:59:55,405 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1090 transitions. [2022-07-12 09:59:55,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1090 transitions. [2022-07-12 09:59:55,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:55,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1090 transitions. [2022-07-12 09:59:55,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 60.55555555555556) internal successors, (1090), 18 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:55,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:55,417 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:55,417 INFO L186 Difference]: Start difference. First operand has 252 places, 309 transitions, 5304 flow. Second operand 18 states and 1090 transitions. [2022-07-12 09:59:55,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 325 transitions, 4943 flow [2022-07-12 09:59:55,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 325 transitions, 4074 flow, removed 338 selfloop flow, removed 22 redundant places. [2022-07-12 09:59:55,637 INFO L242 Difference]: Finished difference. Result has 241 places, 126 transitions, 1033 flow [2022-07-12 09:59:55,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1033, PETRI_PLACES=241, PETRI_TRANSITIONS=126} [2022-07-12 09:59:55,638 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 171 predicate places. [2022-07-12 09:59:55,638 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 126 transitions, 1033 flow [2022-07-12 09:59:55,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:55,638 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:55,639 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:55,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 09:59:55,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:55,840 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:59:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:55,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1656214660, now seen corresponding path program 7 times [2022-07-12 09:59:55,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:55,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242250336] [2022-07-12 09:59:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:55,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 09:59:55,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:55,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242250336] [2022-07-12 09:59:55,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242250336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:55,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313288552] [2022-07-12 09:59:55,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 09:59:55,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:55,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:55,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:55,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 09:59:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 09:59:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 09:59:56,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:59:56,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313288552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:56,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 09:59:56,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2022-07-12 09:59:56,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033842526] [2022-07-12 09:59:56,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:56,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 09:59:56,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:56,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 09:59:56,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-12 09:59:56,095 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-07-12 09:59:56,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 126 transitions, 1033 flow. Second operand has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:56,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:56,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-07-12 09:59:56,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:56,463 INFO L129 PetriNetUnfolder]: 273/1534 cut-off events. [2022-07-12 09:59:56,463 INFO L130 PetriNetUnfolder]: For 17166/17226 co-relation queries the response was YES. [2022-07-12 09:59:56,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5369 conditions, 1534 events. 273/1534 cut-off events. For 17166/17226 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13058 event pairs, 24 based on Foata normal form. 38/1481 useless extension candidates. Maximal degree in co-relation 5291. Up to 202 conditions per place. [2022-07-12 09:59:56,482 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 140/140 dead transitions. [2022-07-12 09:59:56,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 140 transitions, 1017 flow [2022-07-12 09:59:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 09:59:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 09:59:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1074 transitions. [2022-07-12 09:59:56,491 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8523809523809524 [2022-07-12 09:59:56,491 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1074 transitions. [2022-07-12 09:59:56,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1074 transitions. [2022-07-12 09:59:56,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:56,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1074 transitions. [2022-07-12 09:59:56,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.666666666666664) internal successors, (1074), 18 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:56,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:56,501 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:56,501 INFO L186 Difference]: Start difference. First operand has 241 places, 126 transitions, 1033 flow. Second operand 18 states and 1074 transitions. [2022-07-12 09:59:56,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 140 transitions, 1017 flow [2022-07-12 09:59:56,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 140 transitions, 694 flow, removed 63 selfloop flow, removed 60 redundant places. [2022-07-12 09:59:56,527 INFO L242 Difference]: Finished difference. Result has 157 places, 0 transitions, 0 flow [2022-07-12 09:59:56,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=157, PETRI_TRANSITIONS=0} [2022-07-12 09:59:56,528 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 87 predicate places. [2022-07-12 09:59:56,528 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 0 transitions, 0 flow [2022-07-12 09:59:56,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:56,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-07-12 09:59:56,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-07-12 09:59:56,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-07-12 09:59:56,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 09:59:56,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 09:59:56,756 INFO L356 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1] [2022-07-12 09:59:56,758 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-12 09:59:56,758 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 09:59:56,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 09:59:56 BasicIcfg [2022-07-12 09:59:56,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 09:59:56,762 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 09:59:56,762 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 09:59:56,762 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 09:59:56,763 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:59:43" (3/4) ... [2022-07-12 09:59:56,765 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-12 09:59:56,770 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2022-07-12 09:59:56,771 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2022-07-12 09:59:56,774 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-07-12 09:59:56,775 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-12 09:59:56,775 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-12 09:59:56,775 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-12 09:59:56,796 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 09:59:56,800 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 09:59:56,800 INFO L158 Benchmark]: Toolchain (without parser) took 14595.38ms. Allocated memory was 81.8MB in the beginning and 566.2MB in the end (delta: 484.4MB). Free memory was 46.7MB in the beginning and 314.9MB in the end (delta: -268.2MB). Peak memory consumption was 215.8MB. Max. memory is 16.1GB. [2022-07-12 09:59:56,801 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 81.8MB. Free memory was 61.1MB in the beginning and 61.0MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 09:59:56,802 INFO L158 Benchmark]: CACSL2BoogieTranslator took 504.73ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 46.5MB in the beginning and 65.2MB in the end (delta: -18.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 09:59:56,802 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.62ms. Allocated memory is still 98.6MB. Free memory was 65.2MB in the beginning and 63.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 09:59:56,802 INFO L158 Benchmark]: Boogie Preprocessor took 46.61ms. Allocated memory is still 98.6MB. Free memory was 63.1MB in the beginning and 61.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 09:59:56,802 INFO L158 Benchmark]: RCFGBuilder took 329.29ms. Allocated memory is still 98.6MB. Free memory was 61.5MB in the beginning and 50.1MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 09:59:56,803 INFO L158 Benchmark]: TraceAbstraction took 13614.66ms. Allocated memory was 98.6MB in the beginning and 566.2MB in the end (delta: 467.7MB). Free memory was 49.7MB in the beginning and 317.5MB in the end (delta: -267.9MB). Peak memory consumption was 301.7MB. Max. memory is 16.1GB. [2022-07-12 09:59:56,803 INFO L158 Benchmark]: Witness Printer took 37.85ms. Allocated memory is still 566.2MB. Free memory was 317.5MB in the beginning and 314.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 09:59:56,804 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 81.8MB. Free memory was 61.1MB in the beginning and 61.0MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 504.73ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 46.5MB in the beginning and 65.2MB in the end (delta: -18.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.62ms. Allocated memory is still 98.6MB. Free memory was 65.2MB in the beginning and 63.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.61ms. Allocated memory is still 98.6MB. Free memory was 63.1MB in the beginning and 61.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 329.29ms. Allocated memory is still 98.6MB. Free memory was 61.5MB in the beginning and 50.1MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 13614.66ms. Allocated memory was 98.6MB in the beginning and 566.2MB in the end (delta: 467.7MB). Free memory was 49.7MB in the beginning and 317.5MB in the end (delta: -267.9MB). Peak memory consumption was 301.7MB. Max. memory is 16.1GB. * Witness Printer took 37.85ms. Allocated memory is still 566.2MB. Free memory was 317.5MB in the beginning and 314.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13.5s, OverallIterations: 15, TraceHistogramMax: 6, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 487 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 487 mSDsluCounter, 224 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 320 mSDsCounter, 501 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1597 IncrementalHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 501 mSolverCounterUnsat, 72 mSDtfsCounter, 1597 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1265 GetRequests, 928 SyntacticMatches, 2 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5304occurred in iteration=13, InterpolantAutomatonStates: 272, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 1419 NumberOfCodeBlocks, 1414 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1783 ConstructedInterpolants, 0 QuantifiedInterpolants, 6130 SizeOfPredicates, 62 NumberOfNonLiveVariables, 1376 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 385/959 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-12 09:59:56,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE