./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-nonblocking-cntr.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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:18:36,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:18:36,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:18:36,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:18:36,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:18:36,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:18:36,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:18:36,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:18:36,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:18:36,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:18:36,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:18:36,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:18:36,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:18:36,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:18:36,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:18:36,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:18:36,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:18:36,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:18:36,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:18:36,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:18:36,957 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:18:36,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:18:36,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:18:36,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:18:36,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:18:36,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:18:36,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:18:36,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:18:36,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:18:36,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:18:36,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:18:36,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:18:36,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:18:36,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:18:36,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:18:36,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:18:36,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:18:36,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:18:36,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:18:36,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:18:36,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:18:36,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:18:36,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:18:36,989 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:18:36,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:18:36,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:18:36,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:18:36,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:18:36,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:18:36,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:18:36,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:18:36,993 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:18:36,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:18:36,993 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:18:36,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:18:36,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:18:36,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:18:36,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:18:36,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:18:36,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:18:36,994 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:18:36,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:18:36,995 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:18:36,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:18:36,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:18:36,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:18:36,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:18:36,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:18:36,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:18:36,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:18:36,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:18:36,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:18:36,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:18:36,997 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:18:36,997 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:18:36,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:18:36,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-07-13 22:18:37,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:18:37,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:18:37,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:18:37,208 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:18:37,208 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:18:37,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-07-13 22:18:37,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ea8adab9/c2592edee86e46bb992d3f2d6b31cc7c/FLAGc3a13aceb [2022-07-13 22:18:37,556 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:18:37,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-07-13 22:18:37,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ea8adab9/c2592edee86e46bb992d3f2d6b31cc7c/FLAGc3a13aceb [2022-07-13 22:18:37,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ea8adab9/c2592edee86e46bb992d3f2d6b31cc7c [2022-07-13 22:18:38,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:18:38,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:18:38,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:18:38,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:18:38,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:18:38,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cadcac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38, skipping insertion in model container [2022-07-13 22:18:38,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:18:38,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:18:38,146 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-nonblocking-cntr.wvr.c[2037,2050] [2022-07-13 22:18:38,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:18:38,152 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:18:38,164 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-nonblocking-cntr.wvr.c[2037,2050] [2022-07-13 22:18:38,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:18:38,173 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:18:38,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38 WrapperNode [2022-07-13 22:18:38,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:18:38,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:18:38,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:18:38,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:18:38,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,198 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-07-13 22:18:38,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:18:38,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:18:38,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:18:38,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:18:38,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:18:38,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:18:38,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:18:38,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:18:38,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (1/1) ... [2022-07-13 22:18:38,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:18:38,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:38,244 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) [2022-07-13 22:18:38,248 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 [2022-07-13 22:18:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:18:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:18:38,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:18:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:18:38,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:18:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:18:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:18:38,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:18:38,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:18:38,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:18:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:18:38,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:18:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:18:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:18:38,286 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:18:38,384 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:18:38,385 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:18:38,533 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:18:38,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:18:38,567 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 22:18:38,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:18:38 BoogieIcfgContainer [2022-07-13 22:18:38,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:18:38,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:18:38,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:18:38,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:18:38,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:18:38" (1/3) ... [2022-07-13 22:18:38,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e131a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:18:38, skipping insertion in model container [2022-07-13 22:18:38,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:18:38" (2/3) ... [2022-07-13 22:18:38,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e131a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:18:38, skipping insertion in model container [2022-07-13 22:18:38,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:18:38" (3/3) ... [2022-07-13 22:18:38,579 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-07-13 22:18:38,583 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:18:38,590 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:18:38,590 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:18:38,590 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:18:38,646 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:18:38,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-07-13 22:18:38,698 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-13 22:18:38,698 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:18:38,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-07-13 22:18:38,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-07-13 22:18:38,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-07-13 22:18:38,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:18:38,715 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@1ffa090, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@596fa273 [2022-07-13 22:18:38,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:18:38,729 INFO L129 PetriNetUnfolder]: 6/70 cut-off events. [2022-07-13 22:18:38,730 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:18:38,730 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:38,730 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] [2022-07-13 22:18:38,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:38,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-07-13 22:18:38,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:38,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024157865] [2022-07-13 22:18:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:38,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:39,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:39,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024157865] [2022-07-13 22:18:39,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024157865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:39,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:39,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:18:39,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471058114] [2022-07-13 22:18:39,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:39,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:18:39,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:39,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:18:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:18:39,052 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-07-13 22:18:39,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:39,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-07-13 22:18:39,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:39,164 INFO L129 PetriNetUnfolder]: 64/185 cut-off events. [2022-07-13 22:18:39,165 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-13 22:18:39,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 185 events. 64/185 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 555 event pairs, 25 based on Foata normal form. 2/154 useless extension candidates. Maximal degree in co-relation 257. Up to 81 conditions per place. [2022-07-13 22:18:39,169 INFO L132 encePairwiseOnDemand]: 72/82 looper letters, 26 selfloop transitions, 5 changer transitions 2/75 dead transitions. [2022-07-13 22:18:39,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 231 flow [2022-07-13 22:18:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 352 transitions. [2022-07-13 22:18:39,180 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2022-07-13 22:18:39,180 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 352 transitions. [2022-07-13 22:18:39,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 352 transitions. [2022-07-13 22:18:39,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:39,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 352 transitions. [2022-07-13 22:18:39,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,190 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,191 INFO L186 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 6 states and 352 transitions. [2022-07-13 22:18:39,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 231 flow [2022-07-13 22:18:39,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 221 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:18:39,196 INFO L242 Difference]: Finished difference. Result has 74 places, 66 transitions, 152 flow [2022-07-13 22:18:39,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2022-07-13 22:18:39,199 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2022-07-13 22:18:39,199 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 152 flow [2022-07-13 22:18:39,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,200 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:39,200 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] [2022-07-13 22:18:39,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:18:39,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:39,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1831791135, now seen corresponding path program 1 times [2022-07-13 22:18:39,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:39,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379839346] [2022-07-13 22:18:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:39,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:39,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:39,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379839346] [2022-07-13 22:18:39,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379839346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:39,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:18:39,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:18:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259066178] [2022-07-13 22:18:39,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:39,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:18:39,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:18:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:18:39,262 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-07-13 22:18:39,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:39,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-07-13 22:18:39,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:39,337 INFO L129 PetriNetUnfolder]: 87/281 cut-off events. [2022-07-13 22:18:39,337 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-07-13 22:18:39,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 281 events. 87/281 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1072 event pairs, 39 based on Foata normal form. 1/254 useless extension candidates. Maximal degree in co-relation 358. Up to 113 conditions per place. [2022-07-13 22:18:39,340 INFO L132 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-07-13 22:18:39,340 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 291 flow [2022-07-13 22:18:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-07-13 22:18:39,342 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-07-13 22:18:39,342 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-07-13 22:18:39,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-07-13 22:18:39,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:39,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-07-13 22:18:39,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,346 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,346 INFO L186 Difference]: Start difference. First operand has 74 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-07-13 22:18:39,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 291 flow [2022-07-13 22:18:39,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:18:39,348 INFO L242 Difference]: Finished difference. Result has 76 places, 68 transitions, 170 flow [2022-07-13 22:18:39,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2022-07-13 22:18:39,349 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2022-07-13 22:18:39,349 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 170 flow [2022-07-13 22:18:39,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,350 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:39,350 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] [2022-07-13 22:18:39,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:18:39,350 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:39,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:39,351 INFO L85 PathProgramCache]: Analyzing trace with hash -188749577, now seen corresponding path program 2 times [2022-07-13 22:18:39,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:39,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903467695] [2022-07-13 22:18:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:39,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:39,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:39,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903467695] [2022-07-13 22:18:39,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903467695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:39,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186184665] [2022-07-13 22:18:39,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:18:39,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:39,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:39,416 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) [2022-07-13 22:18:39,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:18:39,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-13 22:18:39,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:39,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 22:18:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:18:39,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:18:39,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186184665] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:18:39,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:18:39,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-07-13 22:18:39,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887073021] [2022-07-13 22:18:39,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:18:39,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:18:39,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:39,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:18:39,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:18:39,572 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-07-13 22:18:39,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:39,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-07-13 22:18:39,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:39,688 INFO L129 PetriNetUnfolder]: 44/168 cut-off events. [2022-07-13 22:18:39,688 INFO L130 PetriNetUnfolder]: For 53/59 co-relation queries the response was YES. [2022-07-13 22:18:39,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 168 events. 44/168 cut-off events. For 53/59 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 540 event pairs, 21 based on Foata normal form. 13/176 useless extension candidates. Maximal degree in co-relation 298. Up to 66 conditions per place. [2022-07-13 22:18:39,691 INFO L132 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-07-13 22:18:39,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 233 flow [2022-07-13 22:18:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:18:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:18:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-07-13 22:18:39,694 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-07-13 22:18:39,695 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-07-13 22:18:39,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-07-13 22:18:39,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:39,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-07-13 22:18:39,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,699 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,699 INFO L186 Difference]: Start difference. First operand has 76 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-07-13 22:18:39,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 233 flow [2022-07-13 22:18:39,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-13 22:18:39,702 INFO L242 Difference]: Finished difference. Result has 77 places, 67 transitions, 168 flow [2022-07-13 22:18:39,702 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2022-07-13 22:18:39,704 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-07-13 22:18:39,704 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 168 flow [2022-07-13 22:18:39,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:39,705 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:39,705 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] [2022-07-13 22:18:39,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 22:18:39,917 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 [2022-07-13 22:18:39,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:39,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:39,918 INFO L85 PathProgramCache]: Analyzing trace with hash 285176305, now seen corresponding path program 1 times [2022-07-13 22:18:39,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:39,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512878764] [2022-07-13 22:18:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:39,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:40,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:40,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512878764] [2022-07-13 22:18:40,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512878764] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:40,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80620622] [2022-07-13 22:18:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:40,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:40,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:40,016 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) [2022-07-13 22:18:40,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:18:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:40,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 22:18:40,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:40,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:40,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80620622] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:40,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:40,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-07-13 22:18:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083741286] [2022-07-13 22:18:40,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:40,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:18:40,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:40,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:18:40,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:18:40,444 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-07-13 22:18:40,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:40,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-07-13 22:18:40,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:40,513 INFO L129 PetriNetUnfolder]: 17/162 cut-off events. [2022-07-13 22:18:40,513 INFO L130 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-07-13 22:18:40,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 422 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 109. Up to 21 conditions per place. [2022-07-13 22:18:40,514 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-07-13 22:18:40,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 302 flow [2022-07-13 22:18:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:18:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:18:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-07-13 22:18:40,516 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-07-13 22:18:40,516 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-07-13 22:18:40,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-07-13 22:18:40,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:40,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-07-13 22:18:40,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,519 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,519 INFO L186 Difference]: Start difference. First operand has 77 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-07-13 22:18:40,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 302 flow [2022-07-13 22:18:40,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 22:18:40,523 INFO L242 Difference]: Finished difference. Result has 80 places, 71 transitions, 197 flow [2022-07-13 22:18:40,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2022-07-13 22:18:40,524 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 8 predicate places. [2022-07-13 22:18:40,524 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 197 flow [2022-07-13 22:18:40,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:40,525 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:40,525 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] [2022-07-13 22:18:40,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:40,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 22:18:40,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:40,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash 343908841, now seen corresponding path program 2 times [2022-07-13 22:18:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:40,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868690849] [2022-07-13 22:18:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:40,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:18:40,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:40,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868690849] [2022-07-13 22:18:40,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868690849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558873913] [2022-07-13 22:18:40,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:18:40,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:40,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:40,798 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) [2022-07-13 22:18:40,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:18:40,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:18:40,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:40,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:18:40,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:18:40,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:18:41,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558873913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:41,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:41,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-07-13 22:18:41,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478961713] [2022-07-13 22:18:41,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:41,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:18:41,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:41,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:18:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:18:41,016 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-07-13 22:18:41,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:41,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:41,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-07-13 22:18:41,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:41,112 INFO L129 PetriNetUnfolder]: 109/380 cut-off events. [2022-07-13 22:18:41,112 INFO L130 PetriNetUnfolder]: For 205/215 co-relation queries the response was YES. [2022-07-13 22:18:41,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 380 events. 109/380 cut-off events. For 205/215 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1810 event pairs, 27 based on Foata normal form. 15/388 useless extension candidates. Maximal degree in co-relation 820. Up to 124 conditions per place. [2022-07-13 22:18:41,115 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-07-13 22:18:41,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 99 transitions, 414 flow [2022-07-13 22:18:41,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:18:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:18:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-07-13 22:18:41,117 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-07-13 22:18:41,117 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-07-13 22:18:41,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-07-13 22:18:41,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:41,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-07-13 22:18:41,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:41,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:41,119 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:41,119 INFO L186 Difference]: Start difference. First operand has 80 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-07-13 22:18:41,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 99 transitions, 414 flow [2022-07-13 22:18:41,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-13 22:18:41,123 INFO L242 Difference]: Finished difference. Result has 87 places, 84 transitions, 338 flow [2022-07-13 22:18:41,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2022-07-13 22:18:41,125 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2022-07-13 22:18:41,125 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 338 flow [2022-07-13 22:18:41,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:41,125 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:41,125 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] [2022-07-13 22:18:41,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:41,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:41,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:41,343 INFO L85 PathProgramCache]: Analyzing trace with hash 788007917, now seen corresponding path program 3 times [2022-07-13 22:18:41,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:41,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291180184] [2022-07-13 22:18:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:41,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:41,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:41,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291180184] [2022-07-13 22:18:41,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291180184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:41,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545017452] [2022-07-13 22:18:41,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:18:41,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:41,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:41,467 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) [2022-07-13 22:18:41,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:18:41,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:18:41,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:18:41,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:41,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:41,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545017452] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:41,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:41,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2022-07-13 22:18:41,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009788229] [2022-07-13 22:18:41,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:41,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:18:41,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:41,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:18:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:18:41,709 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:18:41,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 338 flow. Second operand has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:41,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:41,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:18:41,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:42,693 INFO L129 PetriNetUnfolder]: 312/856 cut-off events. [2022-07-13 22:18:42,694 INFO L130 PetriNetUnfolder]: For 1304/1304 co-relation queries the response was YES. [2022-07-13 22:18:42,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2539 conditions, 856 events. 312/856 cut-off events. For 1304/1304 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4684 event pairs, 12 based on Foata normal form. 29/884 useless extension candidates. Maximal degree in co-relation 2047. Up to 168 conditions per place. [2022-07-13 22:18:42,699 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 117 selfloop transitions, 134 changer transitions 11/307 dead transitions. [2022-07-13 22:18:42,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 307 transitions, 1960 flow [2022-07-13 22:18:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-13 22:18:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-13 22:18:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3368 transitions. [2022-07-13 22:18:42,705 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7467849223946785 [2022-07-13 22:18:42,705 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3368 transitions. [2022-07-13 22:18:42,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3368 transitions. [2022-07-13 22:18:42,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:42,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3368 transitions. [2022-07-13 22:18:42,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 61.236363636363635) internal successors, (3368), 55 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:42,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:42,720 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:42,720 INFO L186 Difference]: Start difference. First operand has 87 places, 84 transitions, 338 flow. Second operand 55 states and 3368 transitions. [2022-07-13 22:18:42,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 307 transitions, 1960 flow [2022-07-13 22:18:42,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 307 transitions, 1952 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-13 22:18:42,732 INFO L242 Difference]: Finished difference. Result has 153 places, 206 transitions, 1422 flow [2022-07-13 22:18:42,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1422, PETRI_PLACES=153, PETRI_TRANSITIONS=206} [2022-07-13 22:18:42,734 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 81 predicate places. [2022-07-13 22:18:42,734 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 206 transitions, 1422 flow [2022-07-13 22:18:42,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:42,734 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:42,735 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] [2022-07-13 22:18:42,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:42,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:42,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:42,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:42,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1695977387, now seen corresponding path program 4 times [2022-07-13 22:18:42,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:42,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587515369] [2022-07-13 22:18:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:42,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:43,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:43,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587515369] [2022-07-13 22:18:43,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587515369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:43,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799493491] [2022-07-13 22:18:43,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:18:43,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:43,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:43,062 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) [2022-07-13 22:18:43,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:18:43,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:18:43,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:43,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 22:18:43,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:43,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:43,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799493491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:43,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:43,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-07-13 22:18:43,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937473977] [2022-07-13 22:18:43,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:43,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 22:18:43,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:43,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 22:18:43,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-07-13 22:18:43,413 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:18:43,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 206 transitions, 1422 flow. Second operand has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:43,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:43,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:18:43,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:44,657 INFO L129 PetriNetUnfolder]: 789/2284 cut-off events. [2022-07-13 22:18:44,658 INFO L130 PetriNetUnfolder]: For 7863/7863 co-relation queries the response was YES. [2022-07-13 22:18:44,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8783 conditions, 2284 events. 789/2284 cut-off events. For 7863/7863 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17196 event pairs, 50 based on Foata normal form. 124/2400 useless extension candidates. Maximal degree in co-relation 8060. Up to 444 conditions per place. [2022-07-13 22:18:44,675 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 312 selfloop transitions, 334 changer transitions 21/712 dead transitions. [2022-07-13 22:18:44,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 712 transitions, 6678 flow [2022-07-13 22:18:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 22:18:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-13 22:18:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3772 transitions. [2022-07-13 22:18:44,680 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7540983606557377 [2022-07-13 22:18:44,680 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3772 transitions. [2022-07-13 22:18:44,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3772 transitions. [2022-07-13 22:18:44,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:44,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3772 transitions. [2022-07-13 22:18:44,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.83606557377049) internal successors, (3772), 61 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:44,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:44,693 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:44,693 INFO L186 Difference]: Start difference. First operand has 153 places, 206 transitions, 1422 flow. Second operand 61 states and 3772 transitions. [2022-07-13 22:18:44,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 712 transitions, 6678 flow [2022-07-13 22:18:44,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 712 transitions, 6187 flow, removed 216 selfloop flow, removed 6 redundant places. [2022-07-13 22:18:44,752 INFO L242 Difference]: Finished difference. Result has 237 places, 492 transitions, 4915 flow [2022-07-13 22:18:44,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4915, PETRI_PLACES=237, PETRI_TRANSITIONS=492} [2022-07-13 22:18:44,753 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 165 predicate places. [2022-07-13 22:18:44,754 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 492 transitions, 4915 flow [2022-07-13 22:18:44,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:44,755 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:44,755 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] [2022-07-13 22:18:44,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:44,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:44,971 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:44,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:44,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1062102969, now seen corresponding path program 5 times [2022-07-13 22:18:44,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:44,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364218914] [2022-07-13 22:18:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:44,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:45,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:45,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364218914] [2022-07-13 22:18:45,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364218914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:45,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280598164] [2022-07-13 22:18:45,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:18:45,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:45,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:45,089 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) [2022-07-13 22:18:45,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:18:45,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:18:45,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:45,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 22:18:45,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:45,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:45,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280598164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:45,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:45,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-07-13 22:18:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697067053] [2022-07-13 22:18:45,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:45,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 22:18:45,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 22:18:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-07-13 22:18:45,430 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:18:45,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 492 transitions, 4915 flow. Second operand has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:45,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:45,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:18:45,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:46,440 INFO L129 PetriNetUnfolder]: 962/2727 cut-off events. [2022-07-13 22:18:46,440 INFO L130 PetriNetUnfolder]: For 23134/23134 co-relation queries the response was YES. [2022-07-13 22:18:46,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14524 conditions, 2727 events. 962/2727 cut-off events. For 23134/23134 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 21657 event pairs, 22 based on Foata normal form. 33/2750 useless extension candidates. Maximal degree in co-relation 13882. Up to 512 conditions per place. [2022-07-13 22:18:46,494 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 183 selfloop transitions, 511 changer transitions 7/746 dead transitions. [2022-07-13 22:18:46,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 746 transitions, 9027 flow [2022-07-13 22:18:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 22:18:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-13 22:18:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-07-13 22:18:46,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-07-13 22:18:46,497 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-07-13 22:18:46,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-07-13 22:18:46,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:46,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-07-13 22:18:46,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:46,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:46,505 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:46,505 INFO L186 Difference]: Start difference. First operand has 237 places, 492 transitions, 4915 flow. Second operand 39 states and 2387 transitions. [2022-07-13 22:18:46,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 746 transitions, 9027 flow [2022-07-13 22:18:46,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 746 transitions, 8707 flow, removed 157 selfloop flow, removed 3 redundant places. [2022-07-13 22:18:46,615 INFO L242 Difference]: Finished difference. Result has 286 places, 646 transitions, 8206 flow [2022-07-13 22:18:46,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8206, PETRI_PLACES=286, PETRI_TRANSITIONS=646} [2022-07-13 22:18:46,616 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 214 predicate places. [2022-07-13 22:18:46,617 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 646 transitions, 8206 flow [2022-07-13 22:18:46,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:46,617 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:46,617 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] [2022-07-13 22:18:46,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 22:18:46,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:46,831 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1632526143, now seen corresponding path program 6 times [2022-07-13 22:18:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:46,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008575528] [2022-07-13 22:18:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:46,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:46,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:46,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008575528] [2022-07-13 22:18:46,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008575528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:46,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354423655] [2022-07-13 22:18:46,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:18:46,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:46,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:46,924 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) [2022-07-13 22:18:46,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:18:46,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 22:18:46,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:46,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:18:46,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:47,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:47,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354423655] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:47,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:47,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-07-13 22:18:47,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817232798] [2022-07-13 22:18:47,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:47,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:18:47,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:47,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:18:47,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:18:47,228 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:18:47,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 646 transitions, 8206 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:47,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:47,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:18:47,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:49,095 INFO L129 PetriNetUnfolder]: 1247/3668 cut-off events. [2022-07-13 22:18:49,095 INFO L130 PetriNetUnfolder]: For 46784/46784 co-relation queries the response was YES. [2022-07-13 22:18:49,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22547 conditions, 3668 events. 1247/3668 cut-off events. For 46784/46784 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 31698 event pairs, 60 based on Foata normal form. 38/3674 useless extension candidates. Maximal degree in co-relation 21679. Up to 626 conditions per place. [2022-07-13 22:18:49,170 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 256 selfloop transitions, 795 changer transitions 9/1105 dead transitions. [2022-07-13 22:18:49,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1105 transitions, 16324 flow [2022-07-13 22:18:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-13 22:18:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-13 22:18:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4397 transitions. [2022-07-13 22:18:49,187 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7447493224932249 [2022-07-13 22:18:49,187 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4397 transitions. [2022-07-13 22:18:49,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4397 transitions. [2022-07-13 22:18:49,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:49,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4397 transitions. [2022-07-13 22:18:49,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 61.06944444444444) internal successors, (4397), 72 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:49,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:49,202 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:49,202 INFO L186 Difference]: Start difference. First operand has 286 places, 646 transitions, 8206 flow. Second operand 72 states and 4397 transitions. [2022-07-13 22:18:49,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1105 transitions, 16324 flow [2022-07-13 22:18:49,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1105 transitions, 15317 flow, removed 156 selfloop flow, removed 19 redundant places. [2022-07-13 22:18:49,423 INFO L242 Difference]: Finished difference. Result has 368 places, 944 transitions, 14092 flow [2022-07-13 22:18:49,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7528, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=14092, PETRI_PLACES=368, PETRI_TRANSITIONS=944} [2022-07-13 22:18:49,424 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 296 predicate places. [2022-07-13 22:18:49,424 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 944 transitions, 14092 flow [2022-07-13 22:18:49,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:49,425 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:49,425 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] [2022-07-13 22:18:49,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:49,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:49,629 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:49,630 INFO L85 PathProgramCache]: Analyzing trace with hash -925173425, now seen corresponding path program 7 times [2022-07-13 22:18:49,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:49,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097436015] [2022-07-13 22:18:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:49,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:49,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097436015] [2022-07-13 22:18:49,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097436015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191613508] [2022-07-13 22:18:49,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:18:49,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:49,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:49,694 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) [2022-07-13 22:18:49,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:18:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:49,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:18:49,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:49,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:49,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191613508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:49,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:49,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-07-13 22:18:49,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087646651] [2022-07-13 22:18:49,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:49,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:18:49,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:49,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:18:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:18:49,984 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:18:49,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 944 transitions, 14092 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:49,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:49,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:18:49,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:51,566 INFO L129 PetriNetUnfolder]: 1335/3958 cut-off events. [2022-07-13 22:18:51,566 INFO L130 PetriNetUnfolder]: For 65581/65581 co-relation queries the response was YES. [2022-07-13 22:18:51,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27395 conditions, 3958 events. 1335/3958 cut-off events. For 65581/65581 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 35053 event pairs, 32 based on Foata normal form. 2/3950 useless extension candidates. Maximal degree in co-relation 26336. Up to 674 conditions per place. [2022-07-13 22:18:51,613 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 381 selfloop transitions, 755 changer transitions 35/1216 dead transitions. [2022-07-13 22:18:51,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1216 transitions, 21058 flow [2022-07-13 22:18:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 22:18:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-13 22:18:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-07-13 22:18:51,616 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-07-13 22:18:51,616 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-07-13 22:18:51,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-07-13 22:18:51,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:51,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-07-13 22:18:51,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:51,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:51,622 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:51,622 INFO L186 Difference]: Start difference. First operand has 368 places, 944 transitions, 14092 flow. Second operand 41 states and 2515 transitions. [2022-07-13 22:18:51,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1216 transitions, 21058 flow [2022-07-13 22:18:52,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1216 transitions, 20576 flow, removed 170 selfloop flow, removed 22 redundant places. [2022-07-13 22:18:52,109 INFO L242 Difference]: Finished difference. Result has 394 places, 1064 transitions, 17945 flow [2022-07-13 22:18:52,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=13588, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17945, PETRI_PLACES=394, PETRI_TRANSITIONS=1064} [2022-07-13 22:18:52,111 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 322 predicate places. [2022-07-13 22:18:52,111 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1064 transitions, 17945 flow [2022-07-13 22:18:52,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:52,111 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:52,111 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] [2022-07-13 22:18:52,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-13 22:18:52,322 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,SelfDestructingSolverStorable9 [2022-07-13 22:18:52,322 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:52,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:52,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1862553847, now seen corresponding path program 8 times [2022-07-13 22:18:52,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:52,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949346696] [2022-07-13 22:18:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:52,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:52,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:52,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949346696] [2022-07-13 22:18:52,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949346696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:52,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030666707] [2022-07-13 22:18:52,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:18:52,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:52,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:52,406 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) [2022-07-13 22:18:52,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 22:18:52,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:18:52,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:52,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:18:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:52,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:52,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030666707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:52,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:52,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-13 22:18:52,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920397009] [2022-07-13 22:18:52,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:52,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:18:52,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:18:52,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:18:52,693 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:18:52,694 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1064 transitions, 17945 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:52,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:52,694 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:18:52,694 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:55,311 INFO L129 PetriNetUnfolder]: 1748/5156 cut-off events. [2022-07-13 22:18:55,312 INFO L130 PetriNetUnfolder]: For 94133/94133 co-relation queries the response was YES. [2022-07-13 22:18:55,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38289 conditions, 5156 events. 1748/5156 cut-off events. For 94133/94133 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 48232 event pairs, 75 based on Foata normal form. 43/5163 useless extension candidates. Maximal degree in co-relation 37018. Up to 927 conditions per place. [2022-07-13 22:18:55,377 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 338 selfloop transitions, 1244 changer transitions 3/1630 dead transitions. [2022-07-13 22:18:55,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1630 transitions, 30624 flow [2022-07-13 22:18:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-13 22:18:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-13 22:18:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3837 transitions. [2022-07-13 22:18:55,380 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2022-07-13 22:18:55,380 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3837 transitions. [2022-07-13 22:18:55,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3837 transitions. [2022-07-13 22:18:55,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:55,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3837 transitions. [2022-07-13 22:18:55,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.904761904761905) internal successors, (3837), 63 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:55,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:55,390 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:55,390 INFO L186 Difference]: Start difference. First operand has 394 places, 1064 transitions, 17945 flow. Second operand 63 states and 3837 transitions. [2022-07-13 22:18:55,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1630 transitions, 30624 flow [2022-07-13 22:18:56,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1630 transitions, 29455 flow, removed 187 selfloop flow, removed 21 redundant places. [2022-07-13 22:18:56,225 INFO L242 Difference]: Finished difference. Result has 454 places, 1485 transitions, 28896 flow [2022-07-13 22:18:56,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17203, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=28896, PETRI_PLACES=454, PETRI_TRANSITIONS=1485} [2022-07-13 22:18:56,226 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 382 predicate places. [2022-07-13 22:18:56,226 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1485 transitions, 28896 flow [2022-07-13 22:18:56,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:56,227 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:56,227 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] [2022-07-13 22:18:56,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:56,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:56,428 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash -167169759, now seen corresponding path program 9 times [2022-07-13 22:18:56,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:56,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350858581] [2022-07-13 22:18:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:56,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:56,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350858581] [2022-07-13 22:18:56,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350858581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:56,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474501136] [2022-07-13 22:18:56,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:18:56,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:56,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:56,518 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) [2022-07-13 22:18:56,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 22:18:56,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 22:18:56,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:56,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:18:56,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:56,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:56,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474501136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:56,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:56,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-13 22:18:56,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044911775] [2022-07-13 22:18:56,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:56,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:18:56,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:18:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:18:56,862 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:18:56,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1485 transitions, 28896 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:56,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:56,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:18:56,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:59,549 INFO L129 PetriNetUnfolder]: 1760/5259 cut-off events. [2022-07-13 22:18:59,549 INFO L130 PetriNetUnfolder]: For 117980/117980 co-relation queries the response was YES. [2022-07-13 22:18:59,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42899 conditions, 5259 events. 1760/5259 cut-off events. For 117980/117980 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 49672 event pairs, 86 based on Foata normal form. 4/5220 useless extension candidates. Maximal degree in co-relation 42709. Up to 898 conditions per place. [2022-07-13 22:18:59,629 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 539 selfloop transitions, 1041 changer transitions 14/1639 dead transitions. [2022-07-13 22:18:59,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1639 transitions, 34707 flow [2022-07-13 22:18:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 22:18:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-13 22:18:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2525 transitions. [2022-07-13 22:18:59,632 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7510410469958358 [2022-07-13 22:18:59,632 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2525 transitions. [2022-07-13 22:18:59,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2525 transitions. [2022-07-13 22:18:59,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:59,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2525 transitions. [2022-07-13 22:18:59,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.58536585365854) internal successors, (2525), 41 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:59,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:59,639 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:18:59,639 INFO L186 Difference]: Start difference. First operand has 454 places, 1485 transitions, 28896 flow. Second operand 41 states and 2525 transitions. [2022-07-13 22:18:59,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1639 transitions, 34707 flow [2022-07-13 22:19:00,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1639 transitions, 34281 flow, removed 134 selfloop flow, removed 25 redundant places. [2022-07-13 22:19:00,914 INFO L242 Difference]: Finished difference. Result has 476 places, 1521 transitions, 31685 flow [2022-07-13 22:19:00,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=28476, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=31685, PETRI_PLACES=476, PETRI_TRANSITIONS=1521} [2022-07-13 22:19:00,916 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 404 predicate places. [2022-07-13 22:19:00,916 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1521 transitions, 31685 flow [2022-07-13 22:19:00,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:00,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:00,916 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] [2022-07-13 22:19:00,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:01,119 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,SelfDestructingSolverStorable11 [2022-07-13 22:19:01,121 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:19:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:01,122 INFO L85 PathProgramCache]: Analyzing trace with hash -949462277, now seen corresponding path program 10 times [2022-07-13 22:19:01,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:01,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299543082] [2022-07-13 22:19:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:01,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:01,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299543082] [2022-07-13 22:19:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299543082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75196379] [2022-07-13 22:19:01,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:19:01,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:01,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:01,190 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) [2022-07-13 22:19:01,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 22:19:01,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:19:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:01,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:19:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:01,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:01,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75196379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:01,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:01,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-13 22:19:01,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603875925] [2022-07-13 22:19:01,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:01,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 22:19:01,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:01,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 22:19:01,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:19:01,515 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:19:01,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1521 transitions, 31685 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:01,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:01,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:19:01,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:03,957 INFO L129 PetriNetUnfolder]: 1761/5254 cut-off events. [2022-07-13 22:19:03,958 INFO L130 PetriNetUnfolder]: For 124047/124047 co-relation queries the response was YES. [2022-07-13 22:19:04,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44752 conditions, 5254 events. 1761/5254 cut-off events. For 124047/124047 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 49611 event pairs, 156 based on Foata normal form. 1/5163 useless extension candidates. Maximal degree in co-relation 44518. Up to 900 conditions per place. [2022-07-13 22:19:04,027 INFO L132 encePairwiseOnDemand]: 71/82 looper letters, 656 selfloop transitions, 868 changer transitions 12/1581 dead transitions. [2022-07-13 22:19:04,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1581 transitions, 35757 flow [2022-07-13 22:19:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 22:19:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 22:19:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1295 transitions. [2022-07-13 22:19:04,029 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7520325203252033 [2022-07-13 22:19:04,029 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1295 transitions. [2022-07-13 22:19:04,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1295 transitions. [2022-07-13 22:19:04,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:04,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1295 transitions. [2022-07-13 22:19:04,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.666666666666664) internal successors, (1295), 21 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:04,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:04,032 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:04,032 INFO L186 Difference]: Start difference. First operand has 476 places, 1521 transitions, 31685 flow. Second operand 21 states and 1295 transitions. [2022-07-13 22:19:04,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1581 transitions, 35757 flow [2022-07-13 22:19:05,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1581 transitions, 34429 flow, removed 121 selfloop flow, removed 26 redundant places. [2022-07-13 22:19:05,322 INFO L242 Difference]: Finished difference. Result has 471 places, 1527 transitions, 32263 flow [2022-07-13 22:19:05,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30388, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=862, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=32263, PETRI_PLACES=471, PETRI_TRANSITIONS=1527} [2022-07-13 22:19:05,323 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 399 predicate places. [2022-07-13 22:19:05,323 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1527 transitions, 32263 flow [2022-07-13 22:19:05,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:05,324 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:05,324 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] [2022-07-13 22:19:05,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:05,536 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,SelfDestructingSolverStorable12 [2022-07-13 22:19:05,536 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:19:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:05,537 INFO L85 PathProgramCache]: Analyzing trace with hash 258337235, now seen corresponding path program 11 times [2022-07-13 22:19:05,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:05,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234515077] [2022-07-13 22:19:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:05,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234515077] [2022-07-13 22:19:05,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234515077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284794895] [2022-07-13 22:19:05,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:19:05,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:05,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:05,668 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) [2022-07-13 22:19:05,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 22:19:05,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 22:19:05,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:05,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:19:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:05,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:05,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284794895] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:05,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:05,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-07-13 22:19:05,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77714278] [2022-07-13 22:19:05,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:05,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:19:05,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:05,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:19:05,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:19:05,982 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:19:05,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1527 transitions, 32263 flow. Second operand has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:05,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:05,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:19:05,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:08,775 INFO L129 PetriNetUnfolder]: 2222/6104 cut-off events. [2022-07-13 22:19:08,775 INFO L130 PetriNetUnfolder]: For 160146/160146 co-relation queries the response was YES. [2022-07-13 22:19:08,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54762 conditions, 6104 events. 2222/6104 cut-off events. For 160146/160146 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 56585 event pairs, 71 based on Foata normal form. 1/6088 useless extension candidates. Maximal degree in co-relation 54432. Up to 2219 conditions per place. [2022-07-13 22:19:08,863 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1044 selfloop transitions, 906 changer transitions 14/2009 dead transitions. [2022-07-13 22:19:08,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 2009 transitions, 46439 flow [2022-07-13 22:19:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 22:19:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-13 22:19:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1469 transitions. [2022-07-13 22:19:08,864 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7464430894308943 [2022-07-13 22:19:08,864 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1469 transitions. [2022-07-13 22:19:08,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1469 transitions. [2022-07-13 22:19:08,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:08,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1469 transitions. [2022-07-13 22:19:08,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 61.208333333333336) internal successors, (1469), 24 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:08,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 82.0) internal successors, (2050), 25 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:08,868 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 82.0) internal successors, (2050), 25 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:08,868 INFO L186 Difference]: Start difference. First operand has 471 places, 1527 transitions, 32263 flow. Second operand 24 states and 1469 transitions. [2022-07-13 22:19:08,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 2009 transitions, 46439 flow [2022-07-13 22:19:10,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 2009 transitions, 44451 flow, removed 2 selfloop flow, removed 16 redundant places. [2022-07-13 22:19:10,663 INFO L242 Difference]: Finished difference. Result has 486 places, 1815 transitions, 41302 flow [2022-07-13 22:19:10,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30869, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=41302, PETRI_PLACES=486, PETRI_TRANSITIONS=1815} [2022-07-13 22:19:10,665 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 414 predicate places. [2022-07-13 22:19:10,665 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1815 transitions, 41302 flow [2022-07-13 22:19:10,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.13636363636363) internal successors, (1301), 22 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:10,665 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:10,666 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] [2022-07-13 22:19:10,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 22:19:10,881 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,SelfDestructingSolverStorable13 [2022-07-13 22:19:10,881 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:19:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:10,882 INFO L85 PathProgramCache]: Analyzing trace with hash -876241051, now seen corresponding path program 12 times [2022-07-13 22:19:10,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:10,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135654693] [2022-07-13 22:19:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:10,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:10,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:10,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135654693] [2022-07-13 22:19:10,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135654693] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:10,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015169315] [2022-07-13 22:19:10,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:19:10,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:10,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:10,947 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) [2022-07-13 22:19:10,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 22:19:10,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 22:19:10,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:10,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:19:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:11,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:11,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015169315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:11,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:11,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-13 22:19:11,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114434622] [2022-07-13 22:19:11,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:11,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 22:19:11,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 22:19:11,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:19:11,248 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:19:11,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1815 transitions, 41302 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:11,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:11,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:19:11,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:16,884 INFO L129 PetriNetUnfolder]: 3225/9342 cut-off events. [2022-07-13 22:19:16,884 INFO L130 PetriNetUnfolder]: For 269109/269109 co-relation queries the response was YES. [2022-07-13 22:19:16,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86722 conditions, 9342 events. 3225/9342 cut-off events. For 269109/269109 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 95537 event pairs, 157 based on Foata normal form. 11/9304 useless extension candidates. Maximal degree in co-relation 86562. Up to 2674 conditions per place. [2022-07-13 22:19:17,028 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1602 selfloop transitions, 1237 changer transitions 24/2908 dead transitions. [2022-07-13 22:19:17,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 2908 transitions, 72684 flow [2022-07-13 22:19:17,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 22:19:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-13 22:19:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3734 transitions. [2022-07-13 22:19:17,031 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7465013994402239 [2022-07-13 22:19:17,031 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3734 transitions. [2022-07-13 22:19:17,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3734 transitions. [2022-07-13 22:19:17,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:17,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3734 transitions. [2022-07-13 22:19:17,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.21311475409836) internal successors, (3734), 61 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:17,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:17,040 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:17,040 INFO L186 Difference]: Start difference. First operand has 486 places, 1815 transitions, 41302 flow. Second operand 61 states and 3734 transitions. [2022-07-13 22:19:17,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 2908 transitions, 72684 flow [2022-07-13 22:19:20,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 2908 transitions, 72092 flow, removed 181 selfloop flow, removed 12 redundant places. [2022-07-13 22:19:20,679 INFO L242 Difference]: Finished difference. Result has 560 places, 2542 transitions, 63497 flow [2022-07-13 22:19:20,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=40961, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=63497, PETRI_PLACES=560, PETRI_TRANSITIONS=2542} [2022-07-13 22:19:20,681 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 488 predicate places. [2022-07-13 22:19:20,681 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 2542 transitions, 63497 flow [2022-07-13 22:19:20,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:20,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:20,682 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] [2022-07-13 22:19:20,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-13 22:19:20,895 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,SelfDestructingSolverStorable14 [2022-07-13 22:19:20,895 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:19:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash 478208163, now seen corresponding path program 13 times [2022-07-13 22:19:20,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:20,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343618329] [2022-07-13 22:19:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:20,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:20,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:20,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343618329] [2022-07-13 22:19:20,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343618329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:20,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521295961] [2022-07-13 22:19:20,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:19:20,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:20,970 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) [2022-07-13 22:19:20,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 22:19:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:21,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:19:21,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:21,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:21,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521295961] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:21,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:21,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-13 22:19:21,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910629267] [2022-07-13 22:19:21,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:21,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:19:21,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:21,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:19:21,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:19:21,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:19:21,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2542 transitions, 63497 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:21,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:21,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:19:21,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:30,060 INFO L129 PetriNetUnfolder]: 3972/11750 cut-off events. [2022-07-13 22:19:30,060 INFO L130 PetriNetUnfolder]: For 402447/402447 co-relation queries the response was YES. [2022-07-13 22:19:30,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115276 conditions, 11750 events. 3972/11750 cut-off events. For 402447/402447 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 126472 event pairs, 238 based on Foata normal form. 79/11757 useless extension candidates. Maximal degree in co-relation 114268. Up to 2084 conditions per place. [2022-07-13 22:19:30,274 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 928 selfloop transitions, 2346 changer transitions 12/3331 dead transitions. [2022-07-13 22:19:30,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 3331 transitions, 88961 flow [2022-07-13 22:19:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-13 22:19:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-13 22:19:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3629 transitions. [2022-07-13 22:19:30,277 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.750103348491112 [2022-07-13 22:19:30,277 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3629 transitions. [2022-07-13 22:19:30,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3629 transitions. [2022-07-13 22:19:30,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:30,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3629 transitions. [2022-07-13 22:19:30,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 61.50847457627118) internal successors, (3629), 59 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:30,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:30,286 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:30,286 INFO L186 Difference]: Start difference. First operand has 560 places, 2542 transitions, 63497 flow. Second operand 59 states and 3629 transitions. [2022-07-13 22:19:30,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 3331 transitions, 88961 flow [2022-07-13 22:19:36,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 3331 transitions, 88246 flow, removed 315 selfloop flow, removed 15 redundant places. [2022-07-13 22:19:36,266 INFO L242 Difference]: Finished difference. Result has 625 places, 3108 transitions, 86417 flow [2022-07-13 22:19:36,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=62640, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1822, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=86417, PETRI_PLACES=625, PETRI_TRANSITIONS=3108} [2022-07-13 22:19:36,269 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 553 predicate places. [2022-07-13 22:19:36,269 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 3108 transitions, 86417 flow [2022-07-13 22:19:36,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:36,269 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:36,269 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] [2022-07-13 22:19:36,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:36,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:36,474 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:19:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1907780337, now seen corresponding path program 14 times [2022-07-13 22:19:36,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:36,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982273485] [2022-07-13 22:19:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:36,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:36,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:36,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982273485] [2022-07-13 22:19:36,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982273485] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:36,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243435750] [2022-07-13 22:19:36,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:19:36,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:36,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:36,543 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) [2022-07-13 22:19:36,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 22:19:36,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:19:36,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:36,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:19:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:36,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:36,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243435750] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:36,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:36,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-07-13 22:19:36,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299530070] [2022-07-13 22:19:36,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:36,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:19:36,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:36,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:19:36,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:19:36,831 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:19:36,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 3108 transitions, 86417 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:36,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:36,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:19:36,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:47,174 INFO L129 PetriNetUnfolder]: 3986/11919 cut-off events. [2022-07-13 22:19:47,174 INFO L130 PetriNetUnfolder]: For 457064/457075 co-relation queries the response was YES. [2022-07-13 22:19:47,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125431 conditions, 11919 events. 3986/11919 cut-off events. For 457064/457075 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 129436 event pairs, 227 based on Foata normal form. 14/11862 useless extension candidates. Maximal degree in co-relation 124803. Up to 2387 conditions per place. [2022-07-13 22:19:47,408 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1522 selfloop transitions, 1749 changer transitions 16/3332 dead transitions. [2022-07-13 22:19:47,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 3332 transitions, 98550 flow [2022-07-13 22:19:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-13 22:19:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-13 22:19:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2662 transitions. [2022-07-13 22:19:47,410 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7549631310266591 [2022-07-13 22:19:47,410 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2662 transitions. [2022-07-13 22:19:47,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2662 transitions. [2022-07-13 22:19:47,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:47,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2662 transitions. [2022-07-13 22:19:47,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 61.906976744186046) internal successors, (2662), 43 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:47,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:47,415 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:47,415 INFO L186 Difference]: Start difference. First operand has 625 places, 3108 transitions, 86417 flow. Second operand 43 states and 2662 transitions. [2022-07-13 22:19:47,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 3332 transitions, 98550 flow [2022-07-13 22:19:54,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 3332 transitions, 97346 flow, removed 233 selfloop flow, removed 24 redundant places. [2022-07-13 22:19:54,682 INFO L242 Difference]: Finished difference. Result has 651 places, 3141 transitions, 91046 flow [2022-07-13 22:19:54,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=85195, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1715, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=91046, PETRI_PLACES=651, PETRI_TRANSITIONS=3141} [2022-07-13 22:19:54,684 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 579 predicate places. [2022-07-13 22:19:54,684 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 3141 transitions, 91046 flow [2022-07-13 22:19:54,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:54,684 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:54,685 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] [2022-07-13 22:19:54,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:54,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 22:19:54,889 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:19:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1527497207, now seen corresponding path program 15 times [2022-07-13 22:19:54,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:54,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034998983] [2022-07-13 22:19:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:54,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:55,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034998983] [2022-07-13 22:19:55,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034998983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7376968] [2022-07-13 22:19:55,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:19:55,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:55,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:55,089 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) [2022-07-13 22:19:55,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 22:19:55,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:19:55,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:55,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:19:55,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:55,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:55,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7376968] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:55,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:55,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-07-13 22:19:55,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733945263] [2022-07-13 22:19:55,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:55,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:19:55,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:19:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:19:55,351 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:19:55,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 3141 transitions, 91046 flow. Second operand has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:19:55,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:55,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:19:55,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:06,021 INFO L129 PetriNetUnfolder]: 4247/12550 cut-off events. [2022-07-13 22:20:06,021 INFO L130 PetriNetUnfolder]: For 529890/529890 co-relation queries the response was YES. [2022-07-13 22:20:06,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137140 conditions, 12550 events. 4247/12550 cut-off events. For 529890/529890 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 137100 event pairs, 93 based on Foata normal form. 120/12652 useless extension candidates. Maximal degree in co-relation 136696. Up to 4170 conditions per place. [2022-07-13 22:20:06,287 INFO L132 encePairwiseOnDemand]: 69/82 looper letters, 1360 selfloop transitions, 2155 changer transitions 16/3576 dead transitions. [2022-07-13 22:20:06,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 3576 transitions, 109620 flow [2022-07-13 22:20:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 22:20:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-13 22:20:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2495 transitions. [2022-07-13 22:20:06,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.760670731707317 [2022-07-13 22:20:06,289 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2495 transitions. [2022-07-13 22:20:06,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2495 transitions. [2022-07-13 22:20:06,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:06,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2495 transitions. [2022-07-13 22:20:06,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 62.375) internal successors, (2495), 40 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:06,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:06,294 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 82.0) internal successors, (3362), 41 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:06,294 INFO L186 Difference]: Start difference. First operand has 651 places, 3141 transitions, 91046 flow. Second operand 40 states and 2495 transitions. [2022-07-13 22:20:06,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 3576 transitions, 109620 flow [2022-07-13 22:20:15,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 3576 transitions, 107572 flow, removed 211 selfloop flow, removed 25 redundant places. [2022-07-13 22:20:15,275 INFO L242 Difference]: Finished difference. Result has 693 places, 3353 transitions, 104218 flow [2022-07-13 22:20:15,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=89188, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1947, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=104218, PETRI_PLACES=693, PETRI_TRANSITIONS=3353} [2022-07-13 22:20:15,278 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 621 predicate places. [2022-07-13 22:20:15,278 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 3353 transitions, 104218 flow [2022-07-13 22:20:15,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.69565217391305) internal successors, (1373), 23 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:15,278 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:15,278 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] [2022-07-13 22:20:15,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 22:20:15,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 22:20:15,479 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:15,479 INFO L85 PathProgramCache]: Analyzing trace with hash -738199079, now seen corresponding path program 16 times [2022-07-13 22:20:15,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:15,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153594372] [2022-07-13 22:20:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:15,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:15,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:15,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153594372] [2022-07-13 22:20:15,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153594372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:15,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072728381] [2022-07-13 22:20:15,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:20:15,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:15,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:15,560 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:15,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 22:20:15,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:20:15,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:15,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:20:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:15,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:20:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:15,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072728381] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:20:15,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:20:15,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-13 22:20:15,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682753871] [2022-07-13 22:20:15,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:20:15,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 22:20:15,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 22:20:15,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:20:15,854 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:20:15,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 3353 transitions, 104218 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:15,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:15,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:20:15,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:29,508 INFO L129 PetriNetUnfolder]: 4600/13629 cut-off events. [2022-07-13 22:20:29,509 INFO L130 PetriNetUnfolder]: For 752741/752741 co-relation queries the response was YES. [2022-07-13 22:20:29,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162148 conditions, 13629 events. 4600/13629 cut-off events. For 752741/752741 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 151723 event pairs, 317 based on Foata normal form. 4/13580 useless extension candidates. Maximal degree in co-relation 161702. Up to 5478 conditions per place. [2022-07-13 22:20:29,827 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 2681 selfloop transitions, 975 changer transitions 9/3710 dead transitions. [2022-07-13 22:20:29,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 3710 transitions, 121868 flow [2022-07-13 22:20:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 22:20:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-13 22:20:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2265 transitions. [2022-07-13 22:20:29,829 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7465392221489783 [2022-07-13 22:20:29,829 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2265 transitions. [2022-07-13 22:20:29,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2265 transitions. [2022-07-13 22:20:29,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:29,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2265 transitions. [2022-07-13 22:20:29,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 61.21621621621622) internal successors, (2265), 37 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:29,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:29,834 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:29,834 INFO L186 Difference]: Start difference. First operand has 693 places, 3353 transitions, 104218 flow. Second operand 37 states and 2265 transitions. [2022-07-13 22:20:29,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 3710 transitions, 121868 flow [2022-07-13 22:20:42,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 3710 transitions, 120746 flow, removed 418 selfloop flow, removed 4 redundant places. [2022-07-13 22:20:42,333 INFO L242 Difference]: Finished difference. Result has 738 places, 3499 transitions, 111316 flow [2022-07-13 22:20:42,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=103029, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=826, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=111316, PETRI_PLACES=738, PETRI_TRANSITIONS=3499} [2022-07-13 22:20:42,337 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 666 predicate places. [2022-07-13 22:20:42,337 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 3499 transitions, 111316 flow [2022-07-13 22:20:42,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:42,337 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:42,337 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] [2022-07-13 22:20:42,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-13 22:20:42,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:42,555 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash 822128127, now seen corresponding path program 17 times [2022-07-13 22:20:42,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:42,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382660179] [2022-07-13 22:20:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:42,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:42,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:42,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382660179] [2022-07-13 22:20:42,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382660179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:42,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007228540] [2022-07-13 22:20:42,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:20:42,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:42,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:42,626 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:42,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 22:20:42,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:20:42,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:42,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:20:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:42,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:20:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:42,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007228540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:20:42,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:20:42,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-07-13 22:20:42,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131669863] [2022-07-13 22:20:42,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:20:42,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:20:42,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:42,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:20:42,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:20:42,875 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:20:42,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 3499 transitions, 111316 flow. Second operand has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:42,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:42,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:20:42,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:02,680 INFO L129 PetriNetUnfolder]: 6530/19417 cut-off events. [2022-07-13 22:21:02,680 INFO L130 PetriNetUnfolder]: For 1144568/1144568 co-relation queries the response was YES. [2022-07-13 22:21:03,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234708 conditions, 19417 events. 6530/19417 cut-off events. For 1144568/1144568 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 231725 event pairs, 235 based on Foata normal form. 7/19390 useless extension candidates. Maximal degree in co-relation 234098. Up to 3683 conditions per place. [2022-07-13 22:21:03,161 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1469 selfloop transitions, 3802 changer transitions 10/5326 dead transitions. [2022-07-13 22:21:03,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 5326 transitions, 181444 flow [2022-07-13 22:21:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-13 22:21:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-13 22:21:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3351 transitions. [2022-07-13 22:21:03,163 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7430155210643016 [2022-07-13 22:21:03,163 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3351 transitions. [2022-07-13 22:21:03,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3351 transitions. [2022-07-13 22:21:03,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:03,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3351 transitions. [2022-07-13 22:21:03,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 60.92727272727273) internal successors, (3351), 55 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:03,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:03,169 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:03,169 INFO L186 Difference]: Start difference. First operand has 738 places, 3499 transitions, 111316 flow. Second operand 55 states and 3351 transitions. [2022-07-13 22:21:03,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 5326 transitions, 181444 flow [2022-07-13 22:21:28,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 776 places, 5326 transitions, 180854 flow, removed 219 selfloop flow, removed 12 redundant places. [2022-07-13 22:21:28,408 INFO L242 Difference]: Finished difference. Result has 797 places, 4966 transitions, 177448 flow [2022-07-13 22:21:28,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=110844, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=177448, PETRI_PLACES=797, PETRI_TRANSITIONS=4966} [2022-07-13 22:21:28,411 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 725 predicate places. [2022-07-13 22:21:28,411 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 4966 transitions, 177448 flow [2022-07-13 22:21:28,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.18181818181818) internal successors, (1302), 22 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:28,411 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:21:28,412 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] [2022-07-13 22:21:28,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-13 22:21:28,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:28,613 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:21:28,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:21:28,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1155759277, now seen corresponding path program 18 times [2022-07-13 22:21:28,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:21:28,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721731860] [2022-07-13 22:21:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:21:28,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:21:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:21:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:28,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:21:28,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721731860] [2022-07-13 22:21:28,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721731860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:21:28,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257344729] [2022-07-13 22:21:28,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:21:28,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:21:28,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:21:28,682 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:21:28,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 22:21:28,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:21:28,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:21:28,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:21:28,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:28,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:21:28,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257344729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:28,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:28,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-07-13 22:21:28,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298351685] [2022-07-13 22:21:28,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:28,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:21:28,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:28,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:21:28,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:21:28,925 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:21:28,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 4966 transitions, 177448 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:28,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:28,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:21:28,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:59,391 INFO L129 PetriNetUnfolder]: 6800/20186 cut-off events. [2022-07-13 22:21:59,391 INFO L130 PetriNetUnfolder]: For 1379071/1379071 co-relation queries the response was YES. [2022-07-13 22:21:59,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262250 conditions, 20186 events. 6800/20186 cut-off events. For 1379071/1379071 co-relation queries the response was YES. Maximal size of possible extension queue 1320. Compared 242282 event pairs, 403 based on Foata normal form. 43/20164 useless extension candidates. Maximal degree in co-relation 261395. Up to 7887 conditions per place. [2022-07-13 22:21:59,960 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 1932 selfloop transitions, 3330 changer transitions 7/5314 dead transitions. [2022-07-13 22:21:59,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 5314 transitions, 198766 flow [2022-07-13 22:21:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 22:21:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-13 22:21:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2100 transitions. [2022-07-13 22:21:59,962 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7532281205164992 [2022-07-13 22:21:59,962 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2100 transitions. [2022-07-13 22:21:59,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2100 transitions. [2022-07-13 22:21:59,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:21:59,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2100 transitions. [2022-07-13 22:21:59,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 61.76470588235294) internal successors, (2100), 34 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:59,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:59,966 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 82.0) internal successors, (2870), 35 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:59,966 INFO L186 Difference]: Start difference. First operand has 797 places, 4966 transitions, 177448 flow. Second operand 34 states and 2100 transitions. [2022-07-13 22:21:59,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 5314 transitions, 198766 flow [2022-07-13 22:22:33,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 804 places, 5314 transitions, 197346 flow, removed 480 selfloop flow, removed 21 redundant places. [2022-07-13 22:22:33,408 INFO L242 Difference]: Finished difference. Result has 819 places, 5171 transitions, 196248 flow [2022-07-13 22:22:33,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=176087, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=196248, PETRI_PLACES=819, PETRI_TRANSITIONS=5171} [2022-07-13 22:22:33,411 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 747 predicate places. [2022-07-13 22:22:33,411 INFO L495 AbstractCegarLoop]: Abstraction has has 819 places, 5171 transitions, 196248 flow [2022-07-13 22:22:33,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:33,411 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:33,412 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] [2022-07-13 22:22:33,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 22:22:33,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:33,612 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:33,612 INFO L85 PathProgramCache]: Analyzing trace with hash -270707467, now seen corresponding path program 19 times [2022-07-13 22:22:33,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:33,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078897836] [2022-07-13 22:22:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:33,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:33,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078897836] [2022-07-13 22:22:33,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078897836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718817806] [2022-07-13 22:22:33,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:22:33,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:33,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:33,691 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:33,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 22:22:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:33,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:22:33,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:33,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:22:33,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718817806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:33,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:33,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-07-13 22:22:33,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891116420] [2022-07-13 22:22:33,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:33,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:22:33,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:22:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:22:33,962 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-07-13 22:22:33,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 819 places, 5171 transitions, 196248 flow. Second operand has 22 states, 22 states have (on average 59.72727272727273) internal successors, (1314), 22 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) [2022-07-13 22:22:33,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:33,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-07-13 22:22:33,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand