./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:06:20,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:06:20,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:06:20,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:06:20,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:06:20,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:06:20,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:06:20,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:06:20,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:06:20,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:06:20,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:06:20,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:06:20,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:06:20,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:06:20,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:06:20,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:06:20,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:06:20,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:06:20,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:06:20,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:06:20,856 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:06:20,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:06:20,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:06:20,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:06:20,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:06:20,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:06:20,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:06:20,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:06:20,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:06:20,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:06:20,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:06:20,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:06:20,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:06:20,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:06:20,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:06:20,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:06:20,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:06:20,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:06:20,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:06:20,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:06:20,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:06:20,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:06:20,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:06:20,895 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:06:20,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:06:20,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:06:20,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:06:20,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:06:20,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:06:20,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:06:20,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:06:20,898 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:06:20,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:06:20,899 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:06:20,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:06:20,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:06:20,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:06:20,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:06:20,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:06:20,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:06:20,900 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:06:20,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:06:20,900 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:06:20,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:06:20,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:06:20,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:06:20,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:06:20,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:06:20,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:06:20,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:06:20,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:06:20,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:06:20,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:06:20,902 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:06:20,902 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:06:20,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:06:20,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-07-21 09:06:21,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:06:21,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:06:21,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:06:21,197 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:06:21,198 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:06:21,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-07-21 09:06:21,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37345e8ae/41299ba7f8b74b00b7dafd9e7d6ed202/FLAG5069acdd7 [2022-07-21 09:06:21,552 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:06:21,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-07-21 09:06:21,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37345e8ae/41299ba7f8b74b00b7dafd9e7d6ed202/FLAG5069acdd7 [2022-07-21 09:06:21,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37345e8ae/41299ba7f8b74b00b7dafd9e7d6ed202 [2022-07-21 09:06:21,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:06:21,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:06:21,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:06:21,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:06:21,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:06:21,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:06:21" (1/1) ... [2022-07-21 09:06:21,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c4445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:21, skipping insertion in model container [2022-07-21 09:06:21,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:06:21" (1/1) ... [2022-07-21 09:06:21,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:06:22,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:06:22,115 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-07-21 09:06:22,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:06:22,129 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:06:22,183 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/weaver/popl20-figure3.wvr.c[2121,2134] [2022-07-21 09:06:22,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:06:22,198 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:06:22,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22 WrapperNode [2022-07-21 09:06:22,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:06:22,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:06:22,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:06:22,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:06:22,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (1/1) ... [2022-07-21 09:06:22,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (1/1) ... [2022-07-21 09:06:22,227 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-07-21 09:06:22,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:06:22,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:06:22,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:06:22,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:06:22,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (1/1) ... [2022-07-21 09:06:22,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (1/1) ... [2022-07-21 09:06:22,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (1/1) ... [2022-07-21 09:06:22,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (1/1) ... [2022-07-21 09:06:22,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (1/1) ... [2022-07-21 09:06:22,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (1/1) ... [2022-07-21 09:06:22,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (1/1) ... [2022-07-21 09:06:22,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:06:22,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:06:22,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:06:22,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:06:22,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (1/1) ... [2022-07-21 09:06:22,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:06:22,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:22,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:06:22,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:06:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:06:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:06:22,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:06:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:06:22,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:06:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:06:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:06:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:06:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:06:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:06:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:06:22,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:06:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:06:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:06:22,319 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:06:22,394 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:06:22,401 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:06:22,511 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:06:22,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:06:22,529 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 09:06:22,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:06:22 BoogieIcfgContainer [2022-07-21 09:06:22,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:06:22,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:06:22,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:06:22,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:06:22,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:06:21" (1/3) ... [2022-07-21 09:06:22,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4aedfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:06:22, skipping insertion in model container [2022-07-21 09:06:22,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:22" (2/3) ... [2022-07-21 09:06:22,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4aedfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:06:22, skipping insertion in model container [2022-07-21 09:06:22,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:06:22" (3/3) ... [2022-07-21 09:06:22,536 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-07-21 09:06:22,539 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:06:22,545 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:06:22,545 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:06:22,545 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:06:22,595 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:06:22,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-07-21 09:06:22,647 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-07-21 09:06:22,647 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:06:22,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-07-21 09:06:22,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-07-21 09:06:22,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-07-21 09:06:22,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:06:22,664 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@792c5bfd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@506a46d6 [2022-07-21 09:06:22,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:06:22,679 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-07-21 09:06:22,680 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:06:22,680 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:22,681 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:22,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:22,685 INFO L85 PathProgramCache]: Analyzing trace with hash 653583360, now seen corresponding path program 1 times [2022-07-21 09:06:22,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:22,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937046756] [2022-07-21 09:06:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:22,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:22,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:22,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937046756] [2022-07-21 09:06:22,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937046756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:22,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:22,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:06:22,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348298857] [2022-07-21 09:06:22,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:22,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:06:22,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:06:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:06:22,967 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-21 09:06:22,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 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) [2022-07-21 09:06:22,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:22,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-21 09:06:22,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:23,079 INFO L129 PetriNetUnfolder]: 8/110 cut-off events. [2022-07-21 09:06:23,079 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-21 09:06:23,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 110 events. 8/110 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 1 based on Foata normal form. 15/117 useless extension candidates. Maximal degree in co-relation 62. Up to 18 conditions per place. [2022-07-21 09:06:23,081 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 15 selfloop transitions, 2 changer transitions 8/80 dead transitions. [2022-07-21 09:06:23,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 231 flow [2022-07-21 09:06:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:06:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:06:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 489 transitions. [2022-07-21 09:06:23,099 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8029556650246306 [2022-07-21 09:06:23,099 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 489 transitions. [2022-07-21 09:06:23,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 489 transitions. [2022-07-21 09:06:23,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:23,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 489 transitions. [2022-07-21 09:06:23,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,116 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 7 states and 489 transitions. [2022-07-21 09:06:23,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 231 flow [2022-07-21 09:06:23,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 217 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:06:23,126 INFO L242 Difference]: Finished difference. Result has 82 places, 71 transitions, 162 flow [2022-07-21 09:06:23,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=82, PETRI_TRANSITIONS=71} [2022-07-21 09:06:23,132 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-07-21 09:06:23,132 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 71 transitions, 162 flow [2022-07-21 09:06:23,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 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) [2022-07-21 09:06:23,133 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:23,133 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:23,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:06:23,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:23,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:23,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2080326486, now seen corresponding path program 1 times [2022-07-21 09:06:23,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:23,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882353507] [2022-07-21 09:06:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:23,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:23,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:23,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882353507] [2022-07-21 09:06:23,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882353507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:23,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:23,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:06:23,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061347963] [2022-07-21 09:06:23,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:23,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:06:23,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:23,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:06:23,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:06:23,293 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-21 09:06:23,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 71 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 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) [2022-07-21 09:06:23,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:23,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-21 09:06:23,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:23,467 INFO L129 PetriNetUnfolder]: 74/272 cut-off events. [2022-07-21 09:06:23,468 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-21 09:06:23,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 272 events. 74/272 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1161 event pairs, 22 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 468. Up to 95 conditions per place. [2022-07-21 09:06:23,470 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 31 selfloop transitions, 7 changer transitions 4/96 dead transitions. [2022-07-21 09:06:23,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 305 flow [2022-07-21 09:06:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:06:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:06:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2022-07-21 09:06:23,471 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482758620689655 [2022-07-21 09:06:23,471 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 369 transitions. [2022-07-21 09:06:23,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 369 transitions. [2022-07-21 09:06:23,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:23,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 369 transitions. [2022-07-21 09:06:23,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,474 INFO L186 Difference]: Start difference. First operand has 82 places, 71 transitions, 162 flow. Second operand 5 states and 369 transitions. [2022-07-21 09:06:23,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 305 flow [2022-07-21 09:06:23,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 299 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-21 09:06:23,477 INFO L242 Difference]: Finished difference. Result has 80 places, 77 transitions, 207 flow [2022-07-21 09:06:23,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2022-07-21 09:06:23,477 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-07-21 09:06:23,478 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 207 flow [2022-07-21 09:06:23,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 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) [2022-07-21 09:06:23,478 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:23,478 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:23,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:06:23,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1370932692, now seen corresponding path program 2 times [2022-07-21 09:06:23,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:23,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530175064] [2022-07-21 09:06:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:23,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:23,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530175064] [2022-07-21 09:06:23,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530175064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244845236] [2022-07-21 09:06:23,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:06:23,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:23,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:23,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:23,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:06:23,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:06:23,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:23,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:06:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:23,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:06:23,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244845236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:23,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:06:23,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-21 09:06:23,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957548551] [2022-07-21 09:06:23,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:23,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:06:23,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:06:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:06:23,732 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-07-21 09:06:23,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:23,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-07-21 09:06:23,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:23,825 INFO L129 PetriNetUnfolder]: 64/245 cut-off events. [2022-07-21 09:06:23,825 INFO L130 PetriNetUnfolder]: For 75/81 co-relation queries the response was YES. [2022-07-21 09:06:23,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 245 events. 64/245 cut-off events. For 75/81 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1064 event pairs, 19 based on Foata normal form. 7/239 useless extension candidates. Maximal degree in co-relation 365. Up to 74 conditions per place. [2022-07-21 09:06:23,828 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 23 selfloop transitions, 7 changer transitions 3/92 dead transitions. [2022-07-21 09:06:23,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 92 transitions, 329 flow [2022-07-21 09:06:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:06:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:06:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 302 transitions. [2022-07-21 09:06:23,829 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.867816091954023 [2022-07-21 09:06:23,829 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 302 transitions. [2022-07-21 09:06:23,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 302 transitions. [2022-07-21 09:06:23,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:23,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 302 transitions. [2022-07-21 09:06:23,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,832 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,832 INFO L186 Difference]: Start difference. First operand has 80 places, 77 transitions, 207 flow. Second operand 4 states and 302 transitions. [2022-07-21 09:06:23,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 92 transitions, 329 flow [2022-07-21 09:06:23,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 329 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:06:23,835 INFO L242 Difference]: Finished difference. Result has 86 places, 81 transitions, 263 flow [2022-07-21 09:06:23,835 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2022-07-21 09:06:23,836 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2022-07-21 09:06:23,836 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 263 flow [2022-07-21 09:06:23,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,836 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:23,837 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:23,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:24,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:24,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:24,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1132170860, now seen corresponding path program 3 times [2022-07-21 09:06:24,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:24,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426538790] [2022-07-21 09:06:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:24,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:24,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:24,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426538790] [2022-07-21 09:06:24,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426538790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:24,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:24,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:06:24,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140639566] [2022-07-21 09:06:24,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:24,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:06:24,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:06:24,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:06:24,151 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-21 09:06:24,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 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) [2022-07-21 09:06:24,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:24,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-21 09:06:24,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:24,233 INFO L129 PetriNetUnfolder]: 127/424 cut-off events. [2022-07-21 09:06:24,234 INFO L130 PetriNetUnfolder]: For 314/314 co-relation queries the response was YES. [2022-07-21 09:06:24,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 424 events. 127/424 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2139 event pairs, 52 based on Foata normal form. 3/418 useless extension candidates. Maximal degree in co-relation 752. Up to 125 conditions per place. [2022-07-21 09:06:24,237 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 37 selfloop transitions, 9 changer transitions 4/104 dead transitions. [2022-07-21 09:06:24,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 104 transitions, 460 flow [2022-07-21 09:06:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:06:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:06:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-07-21 09:06:24,239 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-07-21 09:06:24,239 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-07-21 09:06:24,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-07-21 09:06:24,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:24,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-07-21 09:06:24,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,242 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,242 INFO L186 Difference]: Start difference. First operand has 86 places, 81 transitions, 263 flow. Second operand 6 states and 429 transitions. [2022-07-21 09:06:24,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 104 transitions, 460 flow [2022-07-21 09:06:24,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 452 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-21 09:06:24,246 INFO L242 Difference]: Finished difference. Result has 94 places, 83 transitions, 305 flow [2022-07-21 09:06:24,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=94, PETRI_TRANSITIONS=83} [2022-07-21 09:06:24,246 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 17 predicate places. [2022-07-21 09:06:24,247 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 83 transitions, 305 flow [2022-07-21 09:06:24,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 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) [2022-07-21 09:06:24,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:24,260 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:24,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:06:24,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:24,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1391320060, now seen corresponding path program 4 times [2022-07-21 09:06:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:24,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493332153] [2022-07-21 09:06:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:24,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:24,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493332153] [2022-07-21 09:06:24,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493332153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:24,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497828104] [2022-07-21 09:06:24,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:06:24,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:24,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:24,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:24,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:06:24,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:06:24,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:24,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:06:24,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:24,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:24,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497828104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:24,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:24,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-07-21 09:06:24,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148828555] [2022-07-21 09:06:24,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:24,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:06:24,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:24,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:06:24,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:06:24,584 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-21 09:06:24,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 83 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 67.875) internal successors, (543), 8 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:24,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-21 09:06:24,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:24,764 INFO L129 PetriNetUnfolder]: 209/644 cut-off events. [2022-07-21 09:06:24,765 INFO L130 PetriNetUnfolder]: For 775/784 co-relation queries the response was YES. [2022-07-21 09:06:24,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 644 events. 209/644 cut-off events. For 775/784 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3836 event pairs, 19 based on Foata normal form. 8/640 useless extension candidates. Maximal degree in co-relation 1171. Up to 100 conditions per place. [2022-07-21 09:06:24,769 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 53 selfloop transitions, 36 changer transitions 10/153 dead transitions. [2022-07-21 09:06:24,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 153 transitions, 848 flow [2022-07-21 09:06:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:06:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:06:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 736 transitions. [2022-07-21 09:06:24,771 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8459770114942529 [2022-07-21 09:06:24,771 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 736 transitions. [2022-07-21 09:06:24,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 736 transitions. [2022-07-21 09:06:24,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:24,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 736 transitions. [2022-07-21 09:06:24,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 87.0) internal successors, (957), 11 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,774 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 87.0) internal successors, (957), 11 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,775 INFO L186 Difference]: Start difference. First operand has 94 places, 83 transitions, 305 flow. Second operand 10 states and 736 transitions. [2022-07-21 09:06:24,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 153 transitions, 848 flow [2022-07-21 09:06:24,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 153 transitions, 817 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-07-21 09:06:24,779 INFO L242 Difference]: Finished difference. Result has 108 places, 107 transitions, 610 flow [2022-07-21 09:06:24,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=610, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2022-07-21 09:06:24,780 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 31 predicate places. [2022-07-21 09:06:24,780 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 610 flow [2022-07-21 09:06:24,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.875) internal successors, (543), 8 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,781 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:24,781 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:24,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:24,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:25,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2053154838, now seen corresponding path program 5 times [2022-07-21 09:06:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:25,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518768549] [2022-07-21 09:06:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:25,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:25,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:25,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518768549] [2022-07-21 09:06:25,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518768549] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:25,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:25,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:06:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25823673] [2022-07-21 09:06:25,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:25,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:06:25,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:25,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:06:25,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:06:25,095 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-21 09:06:25,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:25,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-21 09:06:25,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:25,220 INFO L129 PetriNetUnfolder]: 207/624 cut-off events. [2022-07-21 09:06:25,220 INFO L130 PetriNetUnfolder]: For 1956/1960 co-relation queries the response was YES. [2022-07-21 09:06:25,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 624 events. 207/624 cut-off events. For 1956/1960 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3659 event pairs, 81 based on Foata normal form. 8/621 useless extension candidates. Maximal degree in co-relation 1629. Up to 229 conditions per place. [2022-07-21 09:06:25,225 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 47 selfloop transitions, 27 changer transitions 7/135 dead transitions. [2022-07-21 09:06:25,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 946 flow [2022-07-21 09:06:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:06:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:06:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 442 transitions. [2022-07-21 09:06:25,227 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8467432950191571 [2022-07-21 09:06:25,227 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 442 transitions. [2022-07-21 09:06:25,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 442 transitions. [2022-07-21 09:06:25,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:25,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 442 transitions. [2022-07-21 09:06:25,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,229 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,229 INFO L186 Difference]: Start difference. First operand has 108 places, 107 transitions, 610 flow. Second operand 6 states and 442 transitions. [2022-07-21 09:06:25,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 946 flow [2022-07-21 09:06:25,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 135 transitions, 920 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-07-21 09:06:25,237 INFO L242 Difference]: Finished difference. Result has 115 places, 111 transitions, 710 flow [2022-07-21 09:06:25,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=710, PETRI_PLACES=115, PETRI_TRANSITIONS=111} [2022-07-21 09:06:25,239 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 38 predicate places. [2022-07-21 09:06:25,240 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 111 transitions, 710 flow [2022-07-21 09:06:25,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,240 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:25,240 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:25,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:06:25,241 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1438588188, now seen corresponding path program 1 times [2022-07-21 09:06:25,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:25,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390879804] [2022-07-21 09:06:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:25,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:25,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390879804] [2022-07-21 09:06:25,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390879804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:25,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795682093] [2022-07-21 09:06:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:25,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:25,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:25,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:06:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 09:06:25,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:06:25,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:06:25,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795682093] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:25,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:25,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2022-07-21 09:06:25,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732805071] [2022-07-21 09:06:25,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:25,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:06:25,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:25,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:06:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:06:25,563 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:06:25,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 111 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:25,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:06:25,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:25,669 INFO L129 PetriNetUnfolder]: 108/637 cut-off events. [2022-07-21 09:06:25,669 INFO L130 PetriNetUnfolder]: For 1574/1604 co-relation queries the response was YES. [2022-07-21 09:06:25,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 637 events. 108/637 cut-off events. For 1574/1604 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4282 event pairs, 18 based on Foata normal form. 12/639 useless extension candidates. Maximal degree in co-relation 1476. Up to 88 conditions per place. [2022-07-21 09:06:25,674 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 23 selfloop transitions, 7 changer transitions 4/126 dead transitions. [2022-07-21 09:06:25,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 126 transitions, 818 flow [2022-07-21 09:06:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:06:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:06:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2022-07-21 09:06:25,676 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2022-07-21 09:06:25,676 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2022-07-21 09:06:25,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2022-07-21 09:06:25,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:25,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2022-07-21 09:06:25,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,679 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,679 INFO L186 Difference]: Start difference. First operand has 115 places, 111 transitions, 710 flow. Second operand 7 states and 476 transitions. [2022-07-21 09:06:25,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 126 transitions, 818 flow [2022-07-21 09:06:25,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 126 transitions, 755 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-21 09:06:25,686 INFO L242 Difference]: Finished difference. Result has 119 places, 113 transitions, 691 flow [2022-07-21 09:06:25,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=691, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2022-07-21 09:06:25,687 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-07-21 09:06:25,687 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 691 flow [2022-07-21 09:06:25,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,687 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:25,688 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:25,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:25,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:25,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2121607920, now seen corresponding path program 2 times [2022-07-21 09:06:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:25,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128527320] [2022-07-21 09:06:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:25,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:26,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:26,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128527320] [2022-07-21 09:06:26,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128527320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:26,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259319337] [2022-07-21 09:06:26,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:06:26,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:26,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:26,015 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) [2022-07-21 09:06:26,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:06:26,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:06:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:26,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:06:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:26,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:26,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259319337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:26,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:26,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:06:26,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825639474] [2022-07-21 09:06:26,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:26,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:06:26,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:06:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:06:26,285 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:06:26,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 691 flow. Second operand has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:26,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:26,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:06:26,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:28,532 INFO L129 PetriNetUnfolder]: 883/2531 cut-off events. [2022-07-21 09:06:28,533 INFO L130 PetriNetUnfolder]: For 6718/6737 co-relation queries the response was YES. [2022-07-21 09:06:28,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8330 conditions, 2531 events. 883/2531 cut-off events. For 6718/6737 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19769 event pairs, 62 based on Foata normal form. 32/2548 useless extension candidates. Maximal degree in co-relation 8273. Up to 294 conditions per place. [2022-07-21 09:06:28,550 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 173 selfloop transitions, 210 changer transitions 24/461 dead transitions. [2022-07-21 09:06:28,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 461 transitions, 3794 flow [2022-07-21 09:06:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-21 09:06:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-21 09:06:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4883 transitions. [2022-07-21 09:06:28,560 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7795338441890166 [2022-07-21 09:06:28,561 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4883 transitions. [2022-07-21 09:06:28,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4883 transitions. [2022-07-21 09:06:28,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:28,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4883 transitions. [2022-07-21 09:06:28,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 67.81944444444444) internal successors, (4883), 72 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:28,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 87.0) internal successors, (6351), 73 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:28,607 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 87.0) internal successors, (6351), 73 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:28,607 INFO L186 Difference]: Start difference. First operand has 119 places, 113 transitions, 691 flow. Second operand 72 states and 4883 transitions. [2022-07-21 09:06:28,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 461 transitions, 3794 flow [2022-07-21 09:06:28,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 461 transitions, 3726 flow, removed 33 selfloop flow, removed 3 redundant places. [2022-07-21 09:06:28,628 INFO L242 Difference]: Finished difference. Result has 218 places, 299 transitions, 2745 flow [2022-07-21 09:06:28,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2745, PETRI_PLACES=218, PETRI_TRANSITIONS=299} [2022-07-21 09:06:28,631 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 141 predicate places. [2022-07-21 09:06:28,631 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 299 transitions, 2745 flow [2022-07-21 09:06:28,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:28,632 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:28,632 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:28,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:28,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:28,850 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:28,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:28,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1078465688, now seen corresponding path program 3 times [2022-07-21 09:06:28,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:28,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864970107] [2022-07-21 09:06:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:28,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:28,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:28,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864970107] [2022-07-21 09:06:28,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864970107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:28,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245699709] [2022-07-21 09:06:28,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:06:28,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:28,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:28,969 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) [2022-07-21 09:06:28,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:06:29,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:06:29,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:06:29,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:29,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:29,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245699709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:29,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:29,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-21 09:06:29,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038336262] [2022-07-21 09:06:29,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:06:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:06:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:06:29,198 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:06:29,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 299 transitions, 2745 flow. Second operand has 16 states, 16 states have (on average 65.625) internal successors, (1050), 16 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:29,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:29,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:06:29,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:30,604 INFO L129 PetriNetUnfolder]: 1220/3244 cut-off events. [2022-07-21 09:06:30,604 INFO L130 PetriNetUnfolder]: For 34165/34183 co-relation queries the response was YES. [2022-07-21 09:06:30,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17105 conditions, 3244 events. 1220/3244 cut-off events. For 34165/34183 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 26181 event pairs, 58 based on Foata normal form. 36/3258 useless extension candidates. Maximal degree in co-relation 15734. Up to 438 conditions per place. [2022-07-21 09:06:30,639 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 171 selfloop transitions, 431 changer transitions 12/668 dead transitions. [2022-07-21 09:06:30,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 668 transitions, 8330 flow [2022-07-21 09:06:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 09:06:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-21 09:06:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3176 transitions. [2022-07-21 09:06:30,643 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7767180239667401 [2022-07-21 09:06:30,643 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3176 transitions. [2022-07-21 09:06:30,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3176 transitions. [2022-07-21 09:06:30,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:30,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3176 transitions. [2022-07-21 09:06:30,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.57446808510639) internal successors, (3176), 47 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:30,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:30,652 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:30,653 INFO L186 Difference]: Start difference. First operand has 218 places, 299 transitions, 2745 flow. Second operand 47 states and 3176 transitions. [2022-07-21 09:06:30,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 668 transitions, 8330 flow [2022-07-21 09:06:30,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 668 transitions, 7510 flow, removed 346 selfloop flow, removed 6 redundant places. [2022-07-21 09:06:30,803 INFO L242 Difference]: Finished difference. Result has 284 places, 547 transitions, 6270 flow [2022-07-21 09:06:30,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=6270, PETRI_PLACES=284, PETRI_TRANSITIONS=547} [2022-07-21 09:06:30,804 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 207 predicate places. [2022-07-21 09:06:30,804 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 547 transitions, 6270 flow [2022-07-21 09:06:30,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.625) internal successors, (1050), 16 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:30,805 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:30,805 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:30,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:31,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:31,019 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:31,020 INFO L85 PathProgramCache]: Analyzing trace with hash -599658512, now seen corresponding path program 4 times [2022-07-21 09:06:31,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:31,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034541836] [2022-07-21 09:06:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:31,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:31,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:31,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034541836] [2022-07-21 09:06:31,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034541836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:31,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718557394] [2022-07-21 09:06:31,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:06:31,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:31,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:31,118 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) [2022-07-21 09:06:31,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:06:31,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:06:31,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:31,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:06:31,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:31,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:31,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718557394] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:31,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:31,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-21 09:06:31,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798621650] [2022-07-21 09:06:31,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:31,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 09:06:31,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 09:06:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:06:31,355 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:06:31,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 547 transitions, 6270 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:31,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:31,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:06:31,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:32,808 INFO L129 PetriNetUnfolder]: 1238/3407 cut-off events. [2022-07-21 09:06:32,808 INFO L130 PetriNetUnfolder]: For 62138/62174 co-relation queries the response was YES. [2022-07-21 09:06:32,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20630 conditions, 3407 events. 1238/3407 cut-off events. For 62138/62174 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 28274 event pairs, 77 based on Foata normal form. 15/3388 useless extension candidates. Maximal degree in co-relation 19180. Up to 544 conditions per place. [2022-07-21 09:06:32,861 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 341 selfloop transitions, 279 changer transitions 42/716 dead transitions. [2022-07-21 09:06:32,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 716 transitions, 10316 flow [2022-07-21 09:06:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 09:06:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-21 09:06:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2574 transitions. [2022-07-21 09:06:32,865 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.778584392014519 [2022-07-21 09:06:32,865 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2574 transitions. [2022-07-21 09:06:32,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2574 transitions. [2022-07-21 09:06:32,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:32,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2574 transitions. [2022-07-21 09:06:32,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 67.73684210526316) internal successors, (2574), 38 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:32,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:32,874 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:32,874 INFO L186 Difference]: Start difference. First operand has 284 places, 547 transitions, 6270 flow. Second operand 38 states and 2574 transitions. [2022-07-21 09:06:32,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 716 transitions, 10316 flow [2022-07-21 09:06:33,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 716 transitions, 9327 flow, removed 350 selfloop flow, removed 2 redundant places. [2022-07-21 09:06:33,132 INFO L242 Difference]: Finished difference. Result has 332 places, 584 transitions, 6655 flow [2022-07-21 09:06:33,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=5504, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6655, PETRI_PLACES=332, PETRI_TRANSITIONS=584} [2022-07-21 09:06:33,133 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 255 predicate places. [2022-07-21 09:06:33,133 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 584 transitions, 6655 flow [2022-07-21 09:06:33,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:33,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:33,134 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:33,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:33,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:33,336 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash -907958500, now seen corresponding path program 5 times [2022-07-21 09:06:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:33,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746427694] [2022-07-21 09:06:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:33,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:33,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:33,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746427694] [2022-07-21 09:06:33,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746427694] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:33,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249473907] [2022-07-21 09:06:33,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:06:33,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:33,452 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) [2022-07-21 09:06:33,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:06:33,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:06:33,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:33,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 09:06:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:33,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:33,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249473907] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:33,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:33,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2022-07-21 09:06:33,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262622767] [2022-07-21 09:06:33,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:33,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 09:06:33,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 09:06:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:06:33,811 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:06:33,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 584 transitions, 6655 flow. Second operand has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:33,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:33,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:06:33,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:35,205 INFO L129 PetriNetUnfolder]: 1514/4097 cut-off events. [2022-07-21 09:06:35,205 INFO L130 PetriNetUnfolder]: For 81650/81663 co-relation queries the response was YES. [2022-07-21 09:06:35,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25293 conditions, 4097 events. 1514/4097 cut-off events. For 81650/81663 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 34473 event pairs, 121 based on Foata normal form. 10/4100 useless extension candidates. Maximal degree in co-relation 24928. Up to 798 conditions per place. [2022-07-21 09:06:35,262 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 365 selfloop transitions, 429 changer transitions 5/853 dead transitions. [2022-07-21 09:06:35,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 853 transitions, 11707 flow [2022-07-21 09:06:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 09:06:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-21 09:06:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1887 transitions. [2022-07-21 09:06:35,265 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7746305418719212 [2022-07-21 09:06:35,265 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1887 transitions. [2022-07-21 09:06:35,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1887 transitions. [2022-07-21 09:06:35,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:35,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1887 transitions. [2022-07-21 09:06:35,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 67.39285714285714) internal successors, (1887), 28 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:35,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 87.0) internal successors, (2523), 29 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:35,270 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 87.0) internal successors, (2523), 29 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:35,270 INFO L186 Difference]: Start difference. First operand has 332 places, 584 transitions, 6655 flow. Second operand 28 states and 1887 transitions. [2022-07-21 09:06:35,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 853 transitions, 11707 flow [2022-07-21 09:06:35,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 853 transitions, 11412 flow, removed 109 selfloop flow, removed 6 redundant places. [2022-07-21 09:06:35,641 INFO L242 Difference]: Finished difference. Result has 357 places, 746 transitions, 10190 flow [2022-07-21 09:06:35,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10190, PETRI_PLACES=357, PETRI_TRANSITIONS=746} [2022-07-21 09:06:35,642 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 280 predicate places. [2022-07-21 09:06:35,642 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 746 transitions, 10190 flow [2022-07-21 09:06:35,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:35,643 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:35,643 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:35,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:35,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:35,849 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash 996319846, now seen corresponding path program 6 times [2022-07-21 09:06:35,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:35,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208985969] [2022-07-21 09:06:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:35,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:35,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:35,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208985969] [2022-07-21 09:06:35,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208985969] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:35,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032221984] [2022-07-21 09:06:35,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:06:35,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:35,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:35,974 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) [2022-07-21 09:06:35,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:06:36,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:06:36,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:36,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:06:36,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:36,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:36,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032221984] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:36,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:36,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-21 09:06:36,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626916342] [2022-07-21 09:06:36,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:36,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:06:36,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:36,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:06:36,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:06:36,273 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:06:36,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 746 transitions, 10190 flow. Second operand has 20 states, 20 states have (on average 65.8) internal successors, (1316), 20 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:36,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:36,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:06:36,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:40,110 INFO L129 PetriNetUnfolder]: 2382/6414 cut-off events. [2022-07-21 09:06:40,110 INFO L130 PetriNetUnfolder]: For 156511/156537 co-relation queries the response was YES. [2022-07-21 09:06:40,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43397 conditions, 6414 events. 2382/6414 cut-off events. For 156511/156537 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 59614 event pairs, 33 based on Foata normal form. 32/6420 useless extension candidates. Maximal degree in co-relation 42984. Up to 750 conditions per place. [2022-07-21 09:06:40,209 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 289 selfloop transitions, 1096 changer transitions 5/1444 dead transitions. [2022-07-21 09:06:40,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1444 transitions, 24022 flow [2022-07-21 09:06:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-21 09:06:40,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-07-21 09:06:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 7224 transitions. [2022-07-21 09:06:40,216 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.768837803320562 [2022-07-21 09:06:40,217 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 7224 transitions. [2022-07-21 09:06:40,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 7224 transitions. [2022-07-21 09:06:40,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:40,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 7224 transitions. [2022-07-21 09:06:40,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 66.88888888888889) internal successors, (7224), 108 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:40,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:40,239 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:40,239 INFO L186 Difference]: Start difference. First operand has 357 places, 746 transitions, 10190 flow. Second operand 108 states and 7224 transitions. [2022-07-21 09:06:40,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1444 transitions, 24022 flow [2022-07-21 09:06:41,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 1444 transitions, 22667 flow, removed 629 selfloop flow, removed 7 redundant places. [2022-07-21 09:06:41,372 INFO L242 Difference]: Finished difference. Result has 487 places, 1261 transitions, 20726 flow [2022-07-21 09:06:41,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=9766, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=20726, PETRI_PLACES=487, PETRI_TRANSITIONS=1261} [2022-07-21 09:06:41,373 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 410 predicate places. [2022-07-21 09:06:41,374 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1261 transitions, 20726 flow [2022-07-21 09:06:41,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.8) internal successors, (1316), 20 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:41,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:41,374 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:41,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:41,579 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,SelfDestructingSolverStorable11 [2022-07-21 09:06:41,580 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:41,580 INFO L85 PathProgramCache]: Analyzing trace with hash 356696528, now seen corresponding path program 7 times [2022-07-21 09:06:41,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:41,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580093377] [2022-07-21 09:06:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:41,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:41,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:41,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580093377] [2022-07-21 09:06:41,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580093377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822630795] [2022-07-21 09:06:41,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:06:41,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:41,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:41,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:41,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:06:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:41,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:06:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:41,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:41,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822630795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:41,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:41,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 09:06:41,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264118330] [2022-07-21 09:06:41,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:41,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:06:41,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:41,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:06:41,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:06:41,931 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:06:41,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1261 transitions, 20726 flow. Second operand has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:41,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:41,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:06:41,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:46,193 INFO L129 PetriNetUnfolder]: 3289/8637 cut-off events. [2022-07-21 09:06:46,193 INFO L130 PetriNetUnfolder]: For 260282/260321 co-relation queries the response was YES. [2022-07-21 09:06:46,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66445 conditions, 8637 events. 3289/8637 cut-off events. For 260282/260321 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 84543 event pairs, 120 based on Foata normal form. 51/8596 useless extension candidates. Maximal degree in co-relation 66002. Up to 1078 conditions per place. [2022-07-21 09:06:46,319 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 352 selfloop transitions, 1545 changer transitions 3/1954 dead transitions. [2022-07-21 09:06:46,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1954 transitions, 36611 flow [2022-07-21 09:06:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-21 09:06:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-07-21 09:06:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4171 transitions. [2022-07-21 09:06:46,323 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7732665925101965 [2022-07-21 09:06:46,323 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4171 transitions. [2022-07-21 09:06:46,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4171 transitions. [2022-07-21 09:06:46,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:46,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4171 transitions. [2022-07-21 09:06:46,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.2741935483871) internal successors, (4171), 62 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:46,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:46,333 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:46,333 INFO L186 Difference]: Start difference. First operand has 487 places, 1261 transitions, 20726 flow. Second operand 62 states and 4171 transitions. [2022-07-21 09:06:46,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1954 transitions, 36611 flow [2022-07-21 09:06:48,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 1954 transitions, 34119 flow, removed 1110 selfloop flow, removed 8 redundant places. [2022-07-21 09:06:48,528 INFO L242 Difference]: Finished difference. Result has 569 places, 1846 transitions, 34105 flow [2022-07-21 09:06:48,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=19253, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=966, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=34105, PETRI_PLACES=569, PETRI_TRANSITIONS=1846} [2022-07-21 09:06:48,530 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 492 predicate places. [2022-07-21 09:06:48,530 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 1846 transitions, 34105 flow [2022-07-21 09:06:48,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:48,531 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:48,531 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:48,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:48,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:06:48,732 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:48,733 INFO L85 PathProgramCache]: Analyzing trace with hash 768637718, now seen corresponding path program 8 times [2022-07-21 09:06:48,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:48,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242684622] [2022-07-21 09:06:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:48,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:48,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:48,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242684622] [2022-07-21 09:06:48,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242684622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:48,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762649321] [2022-07-21 09:06:48,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:06:48,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:48,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:48,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:48,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:06:48,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:06:48,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:06:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:48,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:49,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762649321] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:49,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:49,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:06:49,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733755415] [2022-07-21 09:06:49,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:49,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:06:49,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:49,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:06:49,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:06:49,062 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:06:49,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 1846 transitions, 34105 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:49,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:49,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:06:49,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:55,797 INFO L129 PetriNetUnfolder]: 4079/10778 cut-off events. [2022-07-21 09:06:55,797 INFO L130 PetriNetUnfolder]: For 303815/303840 co-relation queries the response was YES. [2022-07-21 09:06:55,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83501 conditions, 10778 events. 4079/10778 cut-off events. For 303815/303840 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 111162 event pairs, 86 based on Foata normal form. 31/10762 useless extension candidates. Maximal degree in co-relation 83132. Up to 1331 conditions per place. [2022-07-21 09:06:55,980 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 313 selfloop transitions, 2117 changer transitions 3/2487 dead transitions. [2022-07-21 09:06:55,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 2487 transitions, 50680 flow [2022-07-21 09:06:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-21 09:06:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-07-21 09:06:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5263 transitions. [2022-07-21 09:06:55,985 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7657500363742179 [2022-07-21 09:06:55,985 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5263 transitions. [2022-07-21 09:06:55,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5263 transitions. [2022-07-21 09:06:55,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:55,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5263 transitions. [2022-07-21 09:06:55,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.62025316455696) internal successors, (5263), 79 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:55,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:55,996 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:55,996 INFO L186 Difference]: Start difference. First operand has 569 places, 1846 transitions, 34105 flow. Second operand 79 states and 5263 transitions. [2022-07-21 09:06:55,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 2487 transitions, 50680 flow [2022-07-21 09:06:59,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 2487 transitions, 50128 flow, removed 149 selfloop flow, removed 13 redundant places. [2022-07-21 09:06:59,872 INFO L242 Difference]: Finished difference. Result has 666 places, 2387 transitions, 50391 flow [2022-07-21 09:06:59,873 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=33652, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=50391, PETRI_PLACES=666, PETRI_TRANSITIONS=2387} [2022-07-21 09:06:59,874 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 589 predicate places. [2022-07-21 09:06:59,874 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 2387 transitions, 50391 flow [2022-07-21 09:06:59,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:59,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:59,874 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:59,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:00,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:07:00,075 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:00,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1627796726, now seen corresponding path program 9 times [2022-07-21 09:07:00,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:00,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623417325] [2022-07-21 09:07:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:00,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:00,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623417325] [2022-07-21 09:07:00,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623417325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7768373] [2022-07-21 09:07:00,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:07:00,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:00,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:00,172 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:00,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:07:00,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:07:00,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:00,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:07:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:00,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:00,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7768373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:00,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:00,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:07:00,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177835225] [2022-07-21 09:07:00,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:00,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:07:00,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:00,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:07:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:07:00,393 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:07:00,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 2387 transitions, 50391 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:00,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:00,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:07:00,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:08,569 INFO L129 PetriNetUnfolder]: 4231/11248 cut-off events. [2022-07-21 09:07:08,570 INFO L130 PetriNetUnfolder]: For 366383/366409 co-relation queries the response was YES. [2022-07-21 09:07:08,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94663 conditions, 11248 events. 4231/11248 cut-off events. For 366383/366409 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 117497 event pairs, 131 based on Foata normal form. 27/11158 useless extension candidates. Maximal degree in co-relation 94392. Up to 1392 conditions per place. [2022-07-21 09:07:08,875 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 854 selfloop transitions, 1765 changer transitions 26/2699 dead transitions. [2022-07-21 09:07:08,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 2699 transitions, 61925 flow [2022-07-21 09:07:08,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-21 09:07:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-21 09:07:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4370 transitions. [2022-07-21 09:07:08,879 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7727674624226348 [2022-07-21 09:07:08,879 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4370 transitions. [2022-07-21 09:07:08,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4370 transitions. [2022-07-21 09:07:08,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:08,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4370 transitions. [2022-07-21 09:07:08,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 67.23076923076923) internal successors, (4370), 65 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:08,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:08,889 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:08,889 INFO L186 Difference]: Start difference. First operand has 666 places, 2387 transitions, 50391 flow. Second operand 65 states and 4370 transitions. [2022-07-21 09:07:08,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 2699 transitions, 61925 flow [2022-07-21 09:07:13,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 2699 transitions, 61349 flow, removed 155 selfloop flow, removed 18 redundant places. [2022-07-21 09:07:13,765 INFO L242 Difference]: Finished difference. Result has 724 places, 2545 transitions, 58046 flow [2022-07-21 09:07:13,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=49721, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=58046, PETRI_PLACES=724, PETRI_TRANSITIONS=2545} [2022-07-21 09:07:13,767 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 647 predicate places. [2022-07-21 09:07:13,767 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 2545 transitions, 58046 flow [2022-07-21 09:07:13,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:13,767 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:13,768 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:13,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:13,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:07:13,984 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1906991496, now seen corresponding path program 10 times [2022-07-21 09:07:13,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:13,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11961580] [2022-07-21 09:07:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:13,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:14,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:14,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11961580] [2022-07-21 09:07:14,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11961580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:14,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116912588] [2022-07-21 09:07:14,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:07:14,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:14,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:14,092 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:14,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:07:14,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:07:14,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:07:14,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:14,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:14,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116912588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:14,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:14,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-21 09:07:14,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989916002] [2022-07-21 09:07:14,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:14,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:07:14,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:07:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:07:14,346 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:07:14,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 2545 transitions, 58046 flow. Second operand has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:14,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:14,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:07:14,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:26,298 INFO L129 PetriNetUnfolder]: 5636/14703 cut-off events. [2022-07-21 09:07:26,298 INFO L130 PetriNetUnfolder]: For 615022/615058 co-relation queries the response was YES. [2022-07-21 09:07:26,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138398 conditions, 14703 events. 5636/14703 cut-off events. For 615022/615058 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 159622 event pairs, 579 based on Foata normal form. 52/14586 useless extension candidates. Maximal degree in co-relation 138123. Up to 2145 conditions per place. [2022-07-21 09:07:26,602 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1011 selfloop transitions, 2492 changer transitions 2/3559 dead transitions. [2022-07-21 09:07:26,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 3559 transitions, 88295 flow [2022-07-21 09:07:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-21 09:07:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-07-21 09:07:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4991 transitions. [2022-07-21 09:07:26,606 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7752407579993786 [2022-07-21 09:07:26,606 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4991 transitions. [2022-07-21 09:07:26,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4991 transitions. [2022-07-21 09:07:26,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:26,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4991 transitions. [2022-07-21 09:07:26,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 67.44594594594595) internal successors, (4991), 74 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:26,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:26,616 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:26,616 INFO L186 Difference]: Start difference. First operand has 724 places, 2545 transitions, 58046 flow. Second operand 74 states and 4991 transitions. [2022-07-21 09:07:26,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 3559 transitions, 88295 flow [2022-07-21 09:07:35,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 3559 transitions, 86706 flow, removed 413 selfloop flow, removed 25 redundant places. [2022-07-21 09:07:35,909 INFO L242 Difference]: Finished difference. Result has 793 places, 3328 transitions, 84740 flow [2022-07-21 09:07:35,911 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=57036, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=84740, PETRI_PLACES=793, PETRI_TRANSITIONS=3328} [2022-07-21 09:07:35,911 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 716 predicate places. [2022-07-21 09:07:35,911 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 3328 transitions, 84740 flow [2022-07-21 09:07:35,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:35,912 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:35,912 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:35,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-21 09:07:36,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:07:36,112 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:36,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1650327980, now seen corresponding path program 11 times [2022-07-21 09:07:36,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:36,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476261884] [2022-07-21 09:07:36,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:36,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:36,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:36,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476261884] [2022-07-21 09:07:36,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476261884] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:36,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371008276] [2022-07-21 09:07:36,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:07:36,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:36,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:36,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:36,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:07:36,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:07:36,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:07:36,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:36,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:36,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371008276] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:36,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:36,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:07:36,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860653636] [2022-07-21 09:07:36,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:36,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:07:36,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:36,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:07:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:07:36,458 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:07:36,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 3328 transitions, 84740 flow. Second operand has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:36,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:36,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:07:36,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:53,018 INFO L129 PetriNetUnfolder]: 6268/16422 cut-off events. [2022-07-21 09:07:53,018 INFO L130 PetriNetUnfolder]: For 868432/868481 co-relation queries the response was YES. [2022-07-21 09:07:53,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167517 conditions, 16422 events. 6268/16422 cut-off events. For 868432/868481 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 180918 event pairs, 421 based on Foata normal form. 48/16267 useless extension candidates. Maximal degree in co-relation 167157. Up to 2169 conditions per place. [2022-07-21 09:07:53,430 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 711 selfloop transitions, 3100 changer transitions 4/3869 dead transitions. [2022-07-21 09:07:53,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 875 places, 3869 transitions, 105785 flow [2022-07-21 09:07:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-21 09:07:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-07-21 09:07:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5585 transitions. [2022-07-21 09:07:53,434 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7734385819138624 [2022-07-21 09:07:53,434 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5585 transitions. [2022-07-21 09:07:53,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5585 transitions. [2022-07-21 09:07:53,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:53,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5585 transitions. [2022-07-21 09:07:53,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 67.28915662650603) internal successors, (5585), 83 states have internal predecessors, (5585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:53,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:53,445 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:53,445 INFO L186 Difference]: Start difference. First operand has 793 places, 3328 transitions, 84740 flow. Second operand 83 states and 5585 transitions. [2022-07-21 09:07:53,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 875 places, 3869 transitions, 105785 flow [2022-07-21 09:08:07,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 856 places, 3869 transitions, 104582 flow, removed 426 selfloop flow, removed 19 redundant places. [2022-07-21 09:08:07,755 INFO L242 Difference]: Finished difference. Result has 877 places, 3634 transitions, 102351 flow [2022-07-21 09:08:07,757 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=83816, PETRI_DIFFERENCE_MINUEND_PLACES=774, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=102351, PETRI_PLACES=877, PETRI_TRANSITIONS=3634} [2022-07-21 09:08:07,757 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 800 predicate places. [2022-07-21 09:08:07,757 INFO L495 AbstractCegarLoop]: Abstraction has has 877 places, 3634 transitions, 102351 flow [2022-07-21 09:08:07,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:07,758 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:08:07,758 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:08:07,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:08:07,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:08:07,958 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:08:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:08:07,959 INFO L85 PathProgramCache]: Analyzing trace with hash 917077054, now seen corresponding path program 12 times [2022-07-21 09:08:07,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:08:07,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294691671] [2022-07-21 09:08:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:08:07,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:08:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:08:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:08:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294691671] [2022-07-21 09:08:08,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294691671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:08:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468793071] [2022-07-21 09:08:08,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:08:08,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:08,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:08:08,049 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:08:08,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:08:08,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:08:08,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:08:08,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:08:08,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:08:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:08,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:08:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:08,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468793071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:08:08,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:08:08,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:08:08,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927518268] [2022-07-21 09:08:08,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:08:08,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:08:08,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:08:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:08:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:08:08,307 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:08:08,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 877 places, 3634 transitions, 102351 flow. Second operand has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:08,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:08:08,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:08:08,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:08:34,364 INFO L129 PetriNetUnfolder]: 8477/22116 cut-off events. [2022-07-21 09:08:34,364 INFO L130 PetriNetUnfolder]: For 1434075/1434159 co-relation queries the response was YES. [2022-07-21 09:08:34,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244450 conditions, 22116 events. 8477/22116 cut-off events. For 1434075/1434159 co-relation queries the response was YES. Maximal size of possible extension queue 1397. Compared 255398 event pairs, 549 based on Foata normal form. 59/21942 useless extension candidates. Maximal degree in co-relation 243965. Up to 3110 conditions per place. [2022-07-21 09:08:35,040 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 756 selfloop transitions, 4596 changer transitions 3/5409 dead transitions. [2022-07-21 09:08:35,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 5409 transitions, 163256 flow [2022-07-21 09:08:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-07-21 09:08:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-07-21 09:08:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8664 transitions. [2022-07-21 09:08:35,047 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7660477453580902 [2022-07-21 09:08:35,047 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8664 transitions. [2022-07-21 09:08:35,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8664 transitions. [2022-07-21 09:08:35,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:08:35,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8664 transitions. [2022-07-21 09:08:35,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.64615384615385) internal successors, (8664), 130 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:35,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:35,064 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:35,064 INFO L186 Difference]: Start difference. First operand has 877 places, 3634 transitions, 102351 flow. Second operand 130 states and 8664 transitions. [2022-07-21 09:08:35,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 5409 transitions, 163256 flow [2022-07-21 09:09:05,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 975 places, 5409 transitions, 159081 flow, removed 534 selfloop flow, removed 31 redundant places. [2022-07-21 09:09:05,711 INFO L242 Difference]: Finished difference. Result has 1015 places, 5163 transitions, 157846 flow [2022-07-21 09:09:05,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=99384, PETRI_DIFFERENCE_MINUEND_PLACES=846, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=157846, PETRI_PLACES=1015, PETRI_TRANSITIONS=5163} [2022-07-21 09:09:05,715 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 938 predicate places. [2022-07-21 09:09:05,715 INFO L495 AbstractCegarLoop]: Abstraction has has 1015 places, 5163 transitions, 157846 flow [2022-07-21 09:09:05,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:05,715 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:05,715 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:09:05,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:09:05,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:05,925 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:09:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash 641559098, now seen corresponding path program 13 times [2022-07-21 09:09:05,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:05,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298418155] [2022-07-21 09:09:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:05,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:06,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:06,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298418155] [2022-07-21 09:09:06,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298418155] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:06,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378277580] [2022-07-21 09:09:06,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:09:06,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:06,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:09:06,024 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:09:06,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:09:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:06,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:09:06,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:09:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:06,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:09:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:06,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378277580] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:09:06,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:09:06,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 09:09:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75821839] [2022-07-21 09:09:06,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:09:06,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:09:06,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:09:06,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:09:06,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:09:06,231 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:09:06,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1015 places, 5163 transitions, 157846 flow. Second operand has 18 states, 18 states have (on average 65.44444444444444) internal successors, (1178), 18 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:06,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:09:06,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:09:06,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:09:48,422 INFO L129 PetriNetUnfolder]: 10147/26155 cut-off events. [2022-07-21 09:09:48,422 INFO L130 PetriNetUnfolder]: For 2118904/2119006 co-relation queries the response was YES. [2022-07-21 09:09:49,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312909 conditions, 26155 events. 10147/26155 cut-off events. For 2118904/2119006 co-relation queries the response was YES. Maximal size of possible extension queue 1627. Compared 309546 event pairs, 647 based on Foata normal form. 103/25965 useless extension candidates. Maximal degree in co-relation 312372. Up to 3730 conditions per place. [2022-07-21 09:09:49,663 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1006 selfloop transitions, 5515 changer transitions 3/6578 dead transitions. [2022-07-21 09:09:49,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1089 places, 6578 transitions, 213210 flow [2022-07-21 09:09:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-21 09:09:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-21 09:09:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5028 transitions. [2022-07-21 09:09:49,666 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7705747126436782 [2022-07-21 09:09:49,666 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5028 transitions. [2022-07-21 09:09:49,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5028 transitions. [2022-07-21 09:09:49,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:09:49,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5028 transitions. [2022-07-21 09:09:49,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 67.04) internal successors, (5028), 75 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:49,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:49,674 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:49,675 INFO L186 Difference]: Start difference. First operand has 1015 places, 5163 transitions, 157846 flow. Second operand 75 states and 5028 transitions. [2022-07-21 09:09:49,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1089 places, 6578 transitions, 213210 flow [2022-07-21 09:10:44,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1063 places, 6578 transitions, 211348 flow, removed 763 selfloop flow, removed 26 redundant places. [2022-07-21 09:10:44,936 INFO L242 Difference]: Finished difference. Result has 1094 places, 6447 transitions, 214613 flow [2022-07-21 09:10:44,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156258, PETRI_DIFFERENCE_MINUEND_PLACES=989, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=214613, PETRI_PLACES=1094, PETRI_TRANSITIONS=6447} [2022-07-21 09:10:44,940 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1017 predicate places. [2022-07-21 09:10:44,940 INFO L495 AbstractCegarLoop]: Abstraction has has 1094 places, 6447 transitions, 214613 flow [2022-07-21 09:10:44,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.44444444444444) internal successors, (1178), 18 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,940 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:44,940 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:44,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:10:45,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:45,144 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:45,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1826540416, now seen corresponding path program 14 times [2022-07-21 09:10:45,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:45,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537188695] [2022-07-21 09:10:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:45,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:45,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537188695] [2022-07-21 09:10:45,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537188695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:45,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169850891] [2022-07-21 09:10:45,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:10:45,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:45,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:45,231 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:10:45,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:10:45,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:10:45,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:10:45,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:10:45,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:45,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:10:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:45,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169850891] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:10:45,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:10:45,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:10:45,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229977668] [2022-07-21 09:10:45,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:10:45,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:10:45,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:10:45,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:10:45,468 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-21 09:10:45,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1094 places, 6447 transitions, 214613 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:45,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:45,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-21 09:10:45,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand